./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN --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 cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c --- 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-6b4ec56 [2022-11-20 09:27:19,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:19,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:19,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:19,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:19,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:19,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:19,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:19,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:19,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:19,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:19,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:19,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:19,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:19,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:19,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:19,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:19,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:19,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:19,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:19,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:19,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:19,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:19,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:19,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:19,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:19,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:19,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:19,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:19,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:19,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:19,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:19,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:19,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:19,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:19,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:19,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:19,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:19,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:19,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:19,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:19,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:27:19,485 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:19,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:19,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:19,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:19,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:19,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:19,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:19,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:19,488 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:19,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:19,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:19,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:19,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:19,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:19,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:19,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:19,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:19,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:19,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:19,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:19,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:19,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:19,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:19,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:19,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:19,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:19,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:19,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:19,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:19,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:19,493 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:19,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:19,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:19,494 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_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb010ae024b402436affeb854f96a5f9e0df3d8ec2cfe8b3a7f33676b7169a2c [2022-11-20 09:27:19,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:19,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:19,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:19,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:19,792 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:19,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-20 09:27:22,978 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:23,290 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:23,291 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i [2022-11-20 09:27:23,305 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/data/14195d4d5/36160528840b4627b8731ee81d192088/FLAG308947fcc [2022-11-20 09:27:23,330 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/data/14195d4d5/36160528840b4627b8731ee81d192088 [2022-11-20 09:27:23,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:23,339 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:23,342 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:23,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:23,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:23,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:23" (1/1) ... [2022-11-20 09:27:23,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5e54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:23, skipping insertion in model container [2022-11-20 09:27:23,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:23" (1/1) ... [2022-11-20 09:27:23,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:23,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:23,879 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-20 09:27:23,898 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:23,911 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:23,952 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/sv-benchmarks/c/goblint-regression/28-race_reach_21-deref_read_racing.i[30176,30189] [2022-11-20 09:27:23,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:24,004 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:24,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24 WrapperNode [2022-11-20 09:27:24,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:24,006 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:24,006 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:24,006 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:24,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,038 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,057 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-20 09:27:24,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:24,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:24,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:24,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:24,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,083 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:24,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:24,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:24,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:24,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (1/1) ... [2022-11-20 09:27:24,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:24,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:24,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:24,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:24,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:27:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:27:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 09:27:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:27:24,196 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 09:27:24,196 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 09:27:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:27:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:24,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:24,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:24,199 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:27:24,384 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:24,386 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:24,649 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:24,656 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:24,657 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-20 09:27:24,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:24 BoogieIcfgContainer [2022-11-20 09:27:24,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:24,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:24,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:24,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:24,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:23" (1/3) ... [2022-11-20 09:27:24,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db419d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:24, skipping insertion in model container [2022-11-20 09:27:24,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:24" (2/3) ... [2022-11-20 09:27:24,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db419d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:24, skipping insertion in model container [2022-11-20 09:27:24,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:24" (3/3) ... [2022-11-20 09:27:24,668 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_21-deref_read_racing.i [2022-11-20 09:27:24,678 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:27:24,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:24,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:27:24,691 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:27:24,761 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:24,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 103 transitions, 211 flow [2022-11-20 09:27:24,927 INFO L130 PetriNetUnfolder]: 14/134 cut-off events. [2022-11-20 09:27:24,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:24,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2022-11-20 09:27:24,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 103 transitions, 211 flow [2022-11-20 09:27:24,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 103 transitions, 211 flow [2022-11-20 09:27:24,960 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:24,968 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:24,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:25,012 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-20 09:27:25,012 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:25,013 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:25,014 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] [2022-11-20 09:27:25,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:25,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1011992479, now seen corresponding path program 1 times [2022-11-20 09:27:25,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:25,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340260075] [2022-11-20 09:27:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:25,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340260075] [2022-11-20 09:27:25,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340260075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:25,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:25,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394521006] [2022-11-20 09:27:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:25,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:25,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:25,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 103 [2022-11-20 09:27:25,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 103 transitions, 211 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:25,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 103 [2022-11-20 09:27:25,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:25,436 INFO L130 PetriNetUnfolder]: 0/118 cut-off events. [2022-11-20 09:27:25,436 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:25,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 118 events. 0/118 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 14/128 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-11-20 09:27:25,438 INFO L137 encePairwiseOnDemand]: 93/103 looper letters, 1 selfloop transitions, 0 changer transitions 11/92 dead transitions. [2022-11-20 09:27:25,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 191 flow [2022-11-20 09:27:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 193 transitions. [2022-11-20 09:27:25,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9368932038834952 [2022-11-20 09:27:25,455 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 193 transitions. [2022-11-20 09:27:25,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 193 transitions. [2022-11-20 09:27:25,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:25,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 193 transitions. [2022-11-20 09:27:25,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 96.5) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,468 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,470 INFO L175 Difference]: Start difference. First operand has 96 places, 103 transitions, 211 flow. Second operand 2 states and 193 transitions. [2022-11-20 09:27:25,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 191 flow [2022-11-20 09:27:25,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 92 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:25,478 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 167 flow [2022-11-20 09:27:25,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=167, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2022-11-20 09:27:25,484 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, 0 predicate places. [2022-11-20 09:27:25,484 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 167 flow [2022-11-20 09:27:25,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:25,485 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] [2022-11-20 09:27:25,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:27:25,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:25,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1486023458, now seen corresponding path program 1 times [2022-11-20 09:27:25,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:25,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046496437] [2022-11-20 09:27:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:25,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:25,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:25,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046496437] [2022-11-20 09:27:25,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046496437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:25,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:25,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:25,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083327029] [2022-11-20 09:27:25,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:25,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:25,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 103 [2022-11-20 09:27:25,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:25,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 103 [2022-11-20 09:27:25,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:25,772 INFO L130 PetriNetUnfolder]: 0/85 cut-off events. [2022-11-20 09:27:25,773 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:25,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 85 events. 0/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 09:27:25,774 INFO L137 encePairwiseOnDemand]: 100/103 looper letters, 8 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2022-11-20 09:27:25,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 191 flow [2022-11-20 09:27:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2022-11-20 09:27:25,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8511326860841424 [2022-11-20 09:27:25,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2022-11-20 09:27:25,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2022-11-20 09:27:25,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:25,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2022-11-20 09:27:25,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,781 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,782 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 167 flow. Second operand 3 states and 263 transitions. [2022-11-20 09:27:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 191 flow [2022-11-20 09:27:25,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:25,785 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 175 flow [2022-11-20 09:27:25,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=103, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2022-11-20 09:27:25,786 INFO L288 CegarLoopForPetriNet]: 96 programPoint places, -8 predicate places. [2022-11-20 09:27:25,786 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 175 flow [2022-11-20 09:27:25,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:25,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:25,787 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:27:25,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash 455753518, now seen corresponding path program 1 times [2022-11-20 09:27:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:25,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684962330] [2022-11-20 09:27:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:25,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:25,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:25,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:25,873 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:25,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:25,876 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:25,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:27:25,877 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 09:27:25,879 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:25,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 09:27:25,906 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:25,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 136 transitions, 284 flow [2022-11-20 09:27:25,948 INFO L130 PetriNetUnfolder]: 24/203 cut-off events. [2022-11-20 09:27:25,948 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 09:27:25,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 203 events. 24/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 552 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 135. Up to 6 conditions per place. [2022-11-20 09:27:25,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 136 transitions, 284 flow [2022-11-20 09:27:25,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 136 transitions, 284 flow [2022-11-20 09:27:25,955 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:25,956 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:25,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:25,968 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:25,968 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:25,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:25,968 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] [2022-11-20 09:27:25,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:25,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:25,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1299574369, now seen corresponding path program 1 times [2022-11-20 09:27:25,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:25,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781052306] [2022-11-20 09:27:25,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:25,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:26,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781052306] [2022-11-20 09:27:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781052306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:26,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26233806] [2022-11-20 09:27:26,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:26,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 136 [2022-11-20 09:27:26,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 136 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:26,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 136 [2022-11-20 09:27:26,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:26,062 INFO L130 PetriNetUnfolder]: 0/176 cut-off events. [2022-11-20 09:27:26,062 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 09:27:26,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 0/176 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 406 event pairs, 0 based on Foata normal form. 26/196 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-20 09:27:26,063 INFO L137 encePairwiseOnDemand]: 120/136 looper letters, 2 selfloop transitions, 0 changer transitions 11/119 dead transitions. [2022-11-20 09:27:26,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 119 transitions, 254 flow [2022-11-20 09:27:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:26,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 252 transitions. [2022-11-20 09:27:26,072 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9264705882352942 [2022-11-20 09:27:26,073 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 252 transitions. [2022-11-20 09:27:26,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 252 transitions. [2022-11-20 09:27:26,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:26,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 252 transitions. [2022-11-20 09:27:26,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 126.0) internal successors, (252), 2 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,079 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,079 INFO L175 Difference]: Start difference. First operand has 125 places, 136 transitions, 284 flow. Second operand 2 states and 252 transitions. [2022-11-20 09:27:26,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 119 transitions, 254 flow [2022-11-20 09:27:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 119 transitions, 252 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:26,087 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 226 flow [2022-11-20 09:27:26,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=226, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2022-11-20 09:27:26,090 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, 0 predicate places. [2022-11-20 09:27:26,090 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 226 flow [2022-11-20 09:27:26,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.5) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:26,092 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] [2022-11-20 09:27:26,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:27:26,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:26,093 INFO L85 PathProgramCache]: Analyzing trace with hash -497376990, now seen corresponding path program 1 times [2022-11-20 09:27:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:26,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536088003] [2022-11-20 09:27:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:26,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:26,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:26,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536088003] [2022-11-20 09:27:26,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536088003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:26,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:26,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:26,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112662336] [2022-11-20 09:27:26,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:26,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 136 [2022-11-20 09:27:26,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:26,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 136 [2022-11-20 09:27:26,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:26,305 INFO L130 PetriNetUnfolder]: 0/132 cut-off events. [2022-11-20 09:27:26,306 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:27:26,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 132 events. 0/132 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 09:27:26,306 INFO L137 encePairwiseOnDemand]: 133/136 looper letters, 11 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2022-11-20 09:27:26,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 112 transitions, 260 flow [2022-11-20 09:27:26,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 344 transitions. [2022-11-20 09:27:26,309 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8431372549019608 [2022-11-20 09:27:26,309 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 344 transitions. [2022-11-20 09:27:26,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 344 transitions. [2022-11-20 09:27:26,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:26,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 344 transitions. [2022-11-20 09:27:26,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 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) [2022-11-20 09:27:26,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,313 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 226 flow. Second operand 3 states and 344 transitions. [2022-11-20 09:27:26,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 112 transitions, 260 flow [2022-11-20 09:27:26,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:26,317 INFO L231 Difference]: Finished difference. Result has 117 places, 109 transitions, 238 flow [2022-11-20 09:27:26,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=117, PETRI_TRANSITIONS=109} [2022-11-20 09:27:26,320 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, -8 predicate places. [2022-11-20 09:27:26,320 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 109 transitions, 238 flow [2022-11-20 09:27:26,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:26,321 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] [2022-11-20 09:27:26,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:27:26,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:26,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:26,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1229485238, now seen corresponding path program 1 times [2022-11-20 09:27:26,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:26,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847903732] [2022-11-20 09:27:26,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:26,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:26,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847903732] [2022-11-20 09:27:26,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847903732] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287854351] [2022-11-20 09:27:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:26,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:26,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:26,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:26,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:26,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:26,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287854351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:26,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:26,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:26,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57878298] [2022-11-20 09:27:26,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:26,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:26,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:26,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:26,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:26,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 136 [2022-11-20 09:27:26,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 109 transitions, 238 flow. Second operand has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:26,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:26,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 136 [2022-11-20 09:27:26,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:27,004 INFO L130 PetriNetUnfolder]: 0/110 cut-off events. [2022-11-20 09:27:27,004 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 09:27:27,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 110 events. 0/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 09:27:27,006 INFO L137 encePairwiseOnDemand]: 131/136 looper letters, 9 selfloop transitions, 7 changer transitions 0/104 dead transitions. [2022-11-20 09:27:27,006 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 104 transitions, 258 flow [2022-11-20 09:27:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:27,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:27,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 999 transitions. [2022-11-20 09:27:27,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-11-20 09:27:27,010 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 999 transitions. [2022-11-20 09:27:27,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 999 transitions. [2022-11-20 09:27:27,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:27,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 999 transitions. [2022-11-20 09:27:27,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.0) internal successors, (999), 9 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,018 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 136.0) internal successors, (1360), 10 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,018 INFO L175 Difference]: Start difference. First operand has 117 places, 109 transitions, 238 flow. Second operand 9 states and 999 transitions. [2022-11-20 09:27:27,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 104 transitions, 258 flow [2022-11-20 09:27:27,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 104 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:27,024 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 230 flow [2022-11-20 09:27:27,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=230, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2022-11-20 09:27:27,028 INFO L288 CegarLoopForPetriNet]: 125 programPoint places, -12 predicate places. [2022-11-20 09:27:27,028 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 230 flow [2022-11-20 09:27:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.3) internal successors, (1113), 10 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:27,031 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:27,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 09:27:27,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 09:27:27,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1842596803, now seen corresponding path program 1 times [2022-11-20 09:27:27,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385545916] [2022-11-20 09:27:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:27,266 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:27,316 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:27,316 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:27,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:27,317 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:27,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 09:27:27,317 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 09:27:27,318 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:27,318 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 09:27:27,354 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:27,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 169 transitions, 359 flow [2022-11-20 09:27:27,399 INFO L130 PetriNetUnfolder]: 34/272 cut-off events. [2022-11-20 09:27:27,400 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 09:27:27,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288 conditions, 272 events. 34/272 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 800 event pairs, 0 based on Foata normal form. 0/230 useless extension candidates. Maximal degree in co-relation 207. Up to 8 conditions per place. [2022-11-20 09:27:27,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 169 transitions, 359 flow [2022-11-20 09:27:27,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 169 transitions, 359 flow [2022-11-20 09:27:27,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:27,413 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:27,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:27,420 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:27,421 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:27,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:27,422 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] [2022-11-20 09:27:27,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1740326689, now seen corresponding path program 1 times [2022-11-20 09:27:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344053052] [2022-11-20 09:27:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:27,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:27,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344053052] [2022-11-20 09:27:27,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344053052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:27,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:27,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:27,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191888192] [2022-11-20 09:27:27,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:27,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:27,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:27,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 169 [2022-11-20 09:27:27,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 169 transitions, 359 flow. Second operand has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:27,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 169 [2022-11-20 09:27:27,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:27,540 INFO L130 PetriNetUnfolder]: 0/234 cut-off events. [2022-11-20 09:27:27,541 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 09:27:27,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 234 events. 0/234 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 653 event pairs, 0 based on Foata normal form. 42/268 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 09:27:27,541 INFO L137 encePairwiseOnDemand]: 147/169 looper letters, 3 selfloop transitions, 0 changer transitions 11/146 dead transitions. [2022-11-20 09:27:27,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 146 transitions, 319 flow [2022-11-20 09:27:27,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 311 transitions. [2022-11-20 09:27:27,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9201183431952663 [2022-11-20 09:27:27,543 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 311 transitions. [2022-11-20 09:27:27,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 311 transitions. [2022-11-20 09:27:27,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:27,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 311 transitions. [2022-11-20 09:27:27,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 155.5) internal successors, (311), 2 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,550 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,550 INFO L175 Difference]: Start difference. First operand has 154 places, 169 transitions, 359 flow. Second operand 2 states and 311 transitions. [2022-11-20 09:27:27,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 146 transitions, 319 flow [2022-11-20 09:27:27,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 146 transitions, 313 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:27,555 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 285 flow [2022-11-20 09:27:27,555 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=285, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2022-11-20 09:27:27,557 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 0 predicate places. [2022-11-20 09:27:27,557 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 285 flow [2022-11-20 09:27:27,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.5) internal successors, (287), 2 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:27,558 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] [2022-11-20 09:27:27,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:27:27,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash -56624670, now seen corresponding path program 1 times [2022-11-20 09:27:27,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730667564] [2022-11-20 09:27:27,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:27,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730667564] [2022-11-20 09:27:27,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730667564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:27,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:27,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636552217] [2022-11-20 09:27:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:27,614 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 169 [2022-11-20 09:27:27,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 285 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:27,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 169 [2022-11-20 09:27:27,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:27,666 INFO L130 PetriNetUnfolder]: 0/179 cut-off events. [2022-11-20 09:27:27,666 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 09:27:27,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 179 events. 0/179 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 373 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 09:27:27,667 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 12 selfloop transitions, 2 changer transitions 0/139 dead transitions. [2022-11-20 09:27:27,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 321 flow [2022-11-20 09:27:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:27,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2022-11-20 09:27:27,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.834319526627219 [2022-11-20 09:27:27,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2022-11-20 09:27:27,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2022-11-20 09:27:27,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:27,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2022-11-20 09:27:27,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,672 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,672 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 285 flow. Second operand 3 states and 423 transitions. [2022-11-20 09:27:27,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 321 flow [2022-11-20 09:27:27,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 321 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:27,676 INFO L231 Difference]: Finished difference. Result has 146 places, 136 transitions, 297 flow [2022-11-20 09:27:27,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=146, PETRI_TRANSITIONS=136} [2022-11-20 09:27:27,678 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, -8 predicate places. [2022-11-20 09:27:27,678 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 136 transitions, 297 flow [2022-11-20 09:27:27,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:27,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:27,680 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] [2022-11-20 09:27:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 09:27:27,681 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1053701942, now seen corresponding path program 1 times [2022-11-20 09:27:27,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557720901] [2022-11-20 09:27:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:27,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557720901] [2022-11-20 09:27:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557720901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875448846] [2022-11-20 09:27:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:27,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:27,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:27,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:27,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:28,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875448846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:28,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:28,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881537564] [2022-11-20 09:27:28,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:28,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:28,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:28,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:28,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:28,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 169 [2022-11-20 09:27:28,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 136 transitions, 297 flow. Second operand has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:28,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 169 [2022-11-20 09:27:28,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:28,199 INFO L130 PetriNetUnfolder]: 0/157 cut-off events. [2022-11-20 09:27:28,200 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 09:27:28,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 157 events. 0/157 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 2/159 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 09:27:28,201 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/146 dead transitions. [2022-11-20 09:27:28,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 146 transitions, 363 flow [2022-11-20 09:27:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:28,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1239 transitions. [2022-11-20 09:27:28,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.814595660749507 [2022-11-20 09:27:28,205 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1239 transitions. [2022-11-20 09:27:28,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1239 transitions. [2022-11-20 09:27:28,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:28,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1239 transitions. [2022-11-20 09:27:28,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 137.66666666666666) internal successors, (1239), 9 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,213 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,213 INFO L175 Difference]: Start difference. First operand has 146 places, 136 transitions, 297 flow. Second operand 9 states and 1239 transitions. [2022-11-20 09:27:28,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 146 transitions, 363 flow [2022-11-20 09:27:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 146 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:28,217 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 345 flow [2022-11-20 09:27:28,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2022-11-20 09:27:28,218 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 2 predicate places. [2022-11-20 09:27:28,218 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 345 flow [2022-11-20 09:27:28,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 137.3) internal successors, (1373), 10 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:28,219 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:28,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:28,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:28,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:28,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1441395879, now seen corresponding path program 1 times [2022-11-20 09:27:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:28,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417528958] [2022-11-20 09:27:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:28,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:28,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:28,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:28,466 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:28,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:28,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 09:27:28,467 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 09:27:28,468 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:28,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 09:27:28,514 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:28,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 436 flow [2022-11-20 09:27:28,569 INFO L130 PetriNetUnfolder]: 44/341 cut-off events. [2022-11-20 09:27:28,570 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 09:27:28,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 341 events. 44/341 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 0 based on Foata normal form. 0/287 useless extension candidates. Maximal degree in co-relation 280. Up to 10 conditions per place. [2022-11-20 09:27:28,574 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 436 flow [2022-11-20 09:27:28,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 436 flow [2022-11-20 09:27:28,579 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:28,580 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:28,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:28,587 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:28,587 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:28,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:28,588 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] [2022-11-20 09:27:28,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:28,588 INFO L85 PathProgramCache]: Analyzing trace with hash 310264481, now seen corresponding path program 1 times [2022-11-20 09:27:28,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:28,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916723521] [2022-11-20 09:27:28,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:28,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916723521] [2022-11-20 09:27:28,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916723521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:28,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:28,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603908636] [2022-11-20 09:27:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:28,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:28,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 202 [2022-11-20 09:27:28,613 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:28,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 202 [2022-11-20 09:27:28,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:28,676 INFO L130 PetriNetUnfolder]: 0/292 cut-off events. [2022-11-20 09:27:28,676 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-11-20 09:27:28,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 292 events. 0/292 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 900 event pairs, 0 based on Foata normal form. 64/346 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2022-11-20 09:27:28,677 INFO L137 encePairwiseOnDemand]: 174/202 looper letters, 4 selfloop transitions, 0 changer transitions 11/173 dead transitions. [2022-11-20 09:27:28,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 386 flow [2022-11-20 09:27:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 370 transitions. [2022-11-20 09:27:28,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9158415841584159 [2022-11-20 09:27:28,680 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 370 transitions. [2022-11-20 09:27:28,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 370 transitions. [2022-11-20 09:27:28,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:28,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 370 transitions. [2022-11-20 09:27:28,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 185.0) internal successors, (370), 2 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,683 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,683 INFO L175 Difference]: Start difference. First operand has 183 places, 202 transitions, 436 flow. Second operand 2 states and 370 transitions. [2022-11-20 09:27:28,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 386 flow [2022-11-20 09:27:28,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 173 transitions, 374 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:28,687 INFO L231 Difference]: Finished difference. Result has 183 places, 162 transitions, 344 flow [2022-11-20 09:27:28,687 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=183, PETRI_TRANSITIONS=162} [2022-11-20 09:27:28,688 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 0 predicate places. [2022-11-20 09:27:28,688 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 162 transitions, 344 flow [2022-11-20 09:27:28,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,689 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:28,689 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] [2022-11-20 09:27:28,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 09:27:28,689 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:28,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1486686878, now seen corresponding path program 1 times [2022-11-20 09:27:28,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:28,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839499238] [2022-11-20 09:27:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:28,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839499238] [2022-11-20 09:27:28,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839499238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:28,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:28,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351487520] [2022-11-20 09:27:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:28,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:28,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2022-11-20 09:27:28,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 162 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:28,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2022-11-20 09:27:28,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:28,796 INFO L130 PetriNetUnfolder]: 0/226 cut-off events. [2022-11-20 09:27:28,796 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 09:27:28,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 226 events. 0/226 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 541 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2022-11-20 09:27:28,797 INFO L137 encePairwiseOnDemand]: 199/202 looper letters, 13 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2022-11-20 09:27:28,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 166 transitions, 382 flow [2022-11-20 09:27:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 502 transitions. [2022-11-20 09:27:28,799 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8283828382838284 [2022-11-20 09:27:28,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 502 transitions. [2022-11-20 09:27:28,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 502 transitions. [2022-11-20 09:27:28,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:28,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 502 transitions. [2022-11-20 09:27:28,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,804 INFO L175 Difference]: Start difference. First operand has 183 places, 162 transitions, 344 flow. Second operand 3 states and 502 transitions. [2022-11-20 09:27:28,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 166 transitions, 382 flow [2022-11-20 09:27:28,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 166 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:28,808 INFO L231 Difference]: Finished difference. Result has 175 places, 163 transitions, 356 flow [2022-11-20 09:27:28,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=175, PETRI_TRANSITIONS=163} [2022-11-20 09:27:28,809 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, -8 predicate places. [2022-11-20 09:27:28,809 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 163 transitions, 356 flow [2022-11-20 09:27:28,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:28,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:28,810 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] [2022-11-20 09:27:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 09:27:28,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2070147350, now seen corresponding path program 1 times [2022-11-20 09:27:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95212047] [2022-11-20 09:27:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:28,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95212047] [2022-11-20 09:27:28,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95212047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:28,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520005480] [2022-11-20 09:27:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:28,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:28,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:28,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:28,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:29,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:29,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:29,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:29,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520005480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:29,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:29,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:29,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950302100] [2022-11-20 09:27:29,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:29,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:29,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:29,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:29,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-20 09:27:29,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 163 transitions, 356 flow. Second operand has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:29,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:29,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-20 09:27:29,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:29,305 INFO L130 PetriNetUnfolder]: 0/204 cut-off events. [2022-11-20 09:27:29,305 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 09:27:29,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 204 events. 0/204 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 412 event pairs, 0 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 09:27:29,306 INFO L137 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/173 dead transitions. [2022-11-20 09:27:29,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 173 transitions, 424 flow [2022-11-20 09:27:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:29,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1474 transitions. [2022-11-20 09:27:29,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8107810781078107 [2022-11-20 09:27:29,312 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1474 transitions. [2022-11-20 09:27:29,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1474 transitions. [2022-11-20 09:27:29,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:29,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1474 transitions. [2022-11-20 09:27:29,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 163.77777777777777) internal successors, (1474), 9 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:29,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:29,323 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:29,323 INFO L175 Difference]: Start difference. First operand has 175 places, 163 transitions, 356 flow. Second operand 9 states and 1474 transitions. [2022-11-20 09:27:29,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 173 transitions, 424 flow [2022-11-20 09:27:29,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 173 transitions, 422 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:29,329 INFO L231 Difference]: Finished difference. Result has 185 places, 169 transitions, 404 flow [2022-11-20 09:27:29,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=404, PETRI_PLACES=185, PETRI_TRANSITIONS=169} [2022-11-20 09:27:29,331 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2022-11-20 09:27:29,331 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 169 transitions, 404 flow [2022-11-20 09:27:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 163.3) internal successors, (1633), 10 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:29,333 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:29,333 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:29,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:29,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:29,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1101282751, now seen corresponding path program 1 times [2022-11-20 09:27:29,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:29,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642575311] [2022-11-20 09:27:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:29,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:29,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642575311] [2022-11-20 09:27:29,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642575311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:29,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372532237] [2022-11-20 09:27:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:29,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:29,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:29,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:29,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:29,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:30,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372532237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:30,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:30,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:30,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270781743] [2022-11-20 09:27:30,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:30,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:30,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 202 [2022-11-20 09:27:30,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 169 transitions, 404 flow. Second operand has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:30,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 202 [2022-11-20 09:27:30,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:30,283 INFO L130 PetriNetUnfolder]: 0/182 cut-off events. [2022-11-20 09:27:30,283 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 09:27:30,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 182 events. 0/182 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/184 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 09:27:30,284 INFO L137 encePairwiseOnDemand]: 197/202 looper letters, 15 selfloop transitions, 13 changer transitions 0/168 dead transitions. [2022-11-20 09:27:30,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 168 transitions, 470 flow [2022-11-20 09:27:30,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 09:27:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-20 09:27:30,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2445 transitions. [2022-11-20 09:27:30,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.806930693069307 [2022-11-20 09:27:30,291 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2445 transitions. [2022-11-20 09:27:30,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2445 transitions. [2022-11-20 09:27:30,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:30,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2445 transitions. [2022-11-20 09:27:30,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 163.0) internal successors, (2445), 15 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,307 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,307 INFO L175 Difference]: Start difference. First operand has 185 places, 169 transitions, 404 flow. Second operand 15 states and 2445 transitions. [2022-11-20 09:27:30,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 168 transitions, 470 flow [2022-11-20 09:27:30,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 168 transitions, 453 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-20 09:27:30,312 INFO L231 Difference]: Finished difference. Result has 184 places, 161 transitions, 402 flow [2022-11-20 09:27:30,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=402, PETRI_PLACES=184, PETRI_TRANSITIONS=161} [2022-11-20 09:27:30,313 INFO L288 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2022-11-20 09:27:30,313 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 161 transitions, 402 flow [2022-11-20 09:27:30,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 163.61111111111111) internal successors, (2945), 18 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:30,315 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:30,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:30,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:27:30,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -909920624, now seen corresponding path program 1 times [2022-11-20 09:27:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:30,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221496071] [2022-11-20 09:27:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:30,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:30,547 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:30,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:30,569 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:30,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:30,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:30,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 09:27:30,570 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 09:27:30,571 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:30,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 09:27:30,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:30,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 235 transitions, 515 flow [2022-11-20 09:27:30,670 INFO L130 PetriNetUnfolder]: 54/410 cut-off events. [2022-11-20 09:27:30,670 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 09:27:30,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 410 events. 54/410 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1315 event pairs, 0 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 354. Up to 12 conditions per place. [2022-11-20 09:27:30,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 212 places, 235 transitions, 515 flow [2022-11-20 09:27:30,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 235 transitions, 515 flow [2022-11-20 09:27:30,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:30,685 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:30,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:30,691 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:30,691 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:30,692 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:30,692 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] [2022-11-20 09:27:30,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:30,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1304355041, now seen corresponding path program 1 times [2022-11-20 09:27:30,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:30,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479382993] [2022-11-20 09:27:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:30,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479382993] [2022-11-20 09:27:30,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479382993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:30,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156300058] [2022-11-20 09:27:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:30,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:30,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:30,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 235 [2022-11-20 09:27:30,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 515 flow. Second operand has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:30,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 235 [2022-11-20 09:27:30,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:30,804 INFO L130 PetriNetUnfolder]: 0/350 cut-off events. [2022-11-20 09:27:30,804 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-20 09:27:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 350 events. 0/350 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1147 event pairs, 0 based on Foata normal form. 92/430 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-11-20 09:27:30,806 INFO L137 encePairwiseOnDemand]: 201/235 looper letters, 5 selfloop transitions, 0 changer transitions 11/200 dead transitions. [2022-11-20 09:27:30,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 455 flow [2022-11-20 09:27:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 429 transitions. [2022-11-20 09:27:30,807 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9127659574468086 [2022-11-20 09:27:30,808 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 429 transitions. [2022-11-20 09:27:30,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 429 transitions. [2022-11-20 09:27:30,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:30,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 429 transitions. [2022-11-20 09:27:30,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 214.5) internal successors, (429), 2 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,811 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 235.0) internal successors, (705), 3 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,811 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 515 flow. Second operand 2 states and 429 transitions. [2022-11-20 09:27:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 455 flow [2022-11-20 09:27:30,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 200 transitions, 435 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:30,850 INFO L231 Difference]: Finished difference. Result has 212 places, 189 transitions, 403 flow [2022-11-20 09:27:30,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=403, PETRI_PLACES=212, PETRI_TRANSITIONS=189} [2022-11-20 09:27:30,851 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 0 predicate places. [2022-11-20 09:27:30,851 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 189 transitions, 403 flow [2022-11-20 09:27:30,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 195.5) internal successors, (391), 2 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,852 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:30,852 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] [2022-11-20 09:27:30,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 09:27:30,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -492596318, now seen corresponding path program 1 times [2022-11-20 09:27:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654557887] [2022-11-20 09:27:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:30,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654557887] [2022-11-20 09:27:30,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654557887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:30,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:30,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:30,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029929241] [2022-11-20 09:27:30,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:30,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:30,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:30,889 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 235 [2022-11-20 09:27:30,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 189 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:30,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 235 [2022-11-20 09:27:30,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:30,979 INFO L130 PetriNetUnfolder]: 0/273 cut-off events. [2022-11-20 09:27:30,979 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 09:27:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 273 events. 0/273 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 713 event pairs, 0 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-20 09:27:30,980 INFO L137 encePairwiseOnDemand]: 232/235 looper letters, 14 selfloop transitions, 2 changer transitions 0/193 dead transitions. [2022-11-20 09:27:30,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 193 transitions, 443 flow [2022-11-20 09:27:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:30,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 581 transitions. [2022-11-20 09:27:30,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8241134751773049 [2022-11-20 09:27:30,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 581 transitions. [2022-11-20 09:27:30,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 581 transitions. [2022-11-20 09:27:30,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:30,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 581 transitions. [2022-11-20 09:27:30,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,988 INFO L175 Difference]: Start difference. First operand has 212 places, 189 transitions, 403 flow. Second operand 3 states and 581 transitions. [2022-11-20 09:27:30,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 193 transitions, 443 flow [2022-11-20 09:27:30,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 193 transitions, 443 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:30,993 INFO L231 Difference]: Finished difference. Result has 204 places, 190 transitions, 415 flow [2022-11-20 09:27:30,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=204, PETRI_TRANSITIONS=190} [2022-11-20 09:27:30,994 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, -8 predicate places. [2022-11-20 09:27:30,994 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 415 flow [2022-11-20 09:27:30,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:30,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:30,994 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] [2022-11-20 09:27:30,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 09:27:30,995 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:30,995 INFO L85 PathProgramCache]: Analyzing trace with hash -16145834, now seen corresponding path program 1 times [2022-11-20 09:27:30,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:30,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140755135] [2022-11-20 09:27:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:30,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:31,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140755135] [2022-11-20 09:27:31,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140755135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380786304] [2022-11-20 09:27:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:31,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:31,089 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:31,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:27:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:31,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:31,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:31,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:31,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380786304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:31,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:31,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:31,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135239966] [2022-11-20 09:27:31,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:31,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:31,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:31,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-20 09:27:31,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 190 transitions, 415 flow. Second operand has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:31,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:31,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-20 09:27:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:31,430 INFO L130 PetriNetUnfolder]: 0/251 cut-off events. [2022-11-20 09:27:31,430 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 09:27:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 251 events. 0/251 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 2/253 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 09:27:31,432 INFO L137 encePairwiseOnDemand]: 229/235 looper letters, 15 selfloop transitions, 9 changer transitions 0/200 dead transitions. [2022-11-20 09:27:31,432 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 200 transitions, 485 flow [2022-11-20 09:27:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:31,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1709 transitions. [2022-11-20 09:27:31,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8080378250591016 [2022-11-20 09:27:31,437 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1709 transitions. [2022-11-20 09:27:31,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1709 transitions. [2022-11-20 09:27:31,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:31,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1709 transitions. [2022-11-20 09:27:31,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 189.88888888888889) internal successors, (1709), 9 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:31,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:31,448 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:31,448 INFO L175 Difference]: Start difference. First operand has 204 places, 190 transitions, 415 flow. Second operand 9 states and 1709 transitions. [2022-11-20 09:27:31,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 200 transitions, 485 flow [2022-11-20 09:27:31,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 200 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:31,453 INFO L231 Difference]: Finished difference. Result has 214 places, 196 transitions, 463 flow [2022-11-20 09:27:31,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=463, PETRI_PLACES=214, PETRI_TRANSITIONS=196} [2022-11-20 09:27:31,454 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 2 predicate places. [2022-11-20 09:27:31,454 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 196 transitions, 463 flow [2022-11-20 09:27:31,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 189.3) internal successors, (1893), 10 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:31,456 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:31,456 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:31,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 09:27:31,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:31,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -2021107327, now seen corresponding path program 1 times [2022-11-20 09:27:31,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:31,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805511681] [2022-11-20 09:27:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805511681] [2022-11-20 09:27:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805511681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:31,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554807222] [2022-11-20 09:27:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:31,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:31,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:31,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:31,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:27:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:32,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:32,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:32,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554807222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:32,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:32,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059348646] [2022-11-20 09:27:32,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:32,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 235 [2022-11-20 09:27:32,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 196 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:32,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:32,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 235 [2022-11-20 09:27:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:32,494 INFO L130 PetriNetUnfolder]: 0/218 cut-off events. [2022-11-20 09:27:32,495 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-20 09:27:32,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 218 events. 0/218 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/221 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 09:27:32,496 INFO L137 encePairwiseOnDemand]: 230/235 looper letters, 18 selfloop transitions, 16 changer transitions 0/200 dead transitions. [2022-11-20 09:27:32,496 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 200 transitions, 565 flow [2022-11-20 09:27:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:27:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:27:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3403 transitions. [2022-11-20 09:27:32,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8044917257683215 [2022-11-20 09:27:32,504 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3403 transitions. [2022-11-20 09:27:32,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3403 transitions. [2022-11-20 09:27:32,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:32,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3403 transitions. [2022-11-20 09:27:32,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.05555555555554) internal successors, (3403), 18 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:32,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:32,522 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 235.0) internal successors, (4465), 19 states have internal predecessors, (4465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:32,523 INFO L175 Difference]: Start difference. First operand has 214 places, 196 transitions, 463 flow. Second operand 18 states and 3403 transitions. [2022-11-20 09:27:32,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 200 transitions, 565 flow [2022-11-20 09:27:32,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 200 transitions, 544 flow, removed 4 selfloop flow, removed 4 redundant places. [2022-11-20 09:27:32,528 INFO L231 Difference]: Finished difference. Result has 216 places, 191 transitions, 480 flow [2022-11-20 09:27:32,528 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=216, PETRI_TRANSITIONS=191} [2022-11-20 09:27:32,529 INFO L288 CegarLoopForPetriNet]: 212 programPoint places, 4 predicate places. [2022-11-20 09:27:32,529 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 191 transitions, 480 flow [2022-11-20 09:27:32,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 189.61111111111111) internal successors, (3413), 18 states have internal predecessors, (3413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:32,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:32,530 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:32,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:32,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:32,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash -30972408, now seen corresponding path program 1 times [2022-11-20 09:27:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:32,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575950562] [2022-11-20 09:27:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:32,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:32,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:32,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:32,813 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:32,813 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:32,814 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 09:27:32,815 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 09:27:32,816 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:32,816 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-20 09:27:32,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:32,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 268 transitions, 596 flow [2022-11-20 09:27:32,951 INFO L130 PetriNetUnfolder]: 64/479 cut-off events. [2022-11-20 09:27:32,951 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-20 09:27:32,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 479 events. 64/479 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1576 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 429. Up to 14 conditions per place. [2022-11-20 09:27:32,959 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 268 transitions, 596 flow [2022-11-20 09:27:32,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 268 transitions, 596 flow [2022-11-20 09:27:32,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:32,966 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:32,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:32,977 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:32,977 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:32,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:32,977 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] [2022-11-20 09:27:32,978 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 427631073, now seen corresponding path program 1 times [2022-11-20 09:27:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:32,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783589335] [2022-11-20 09:27:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:32,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:32,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783589335] [2022-11-20 09:27:32,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783589335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:32,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:32,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:32,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984887830] [2022-11-20 09:27:33,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:33,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:33,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:33,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 268 [2022-11-20 09:27:33,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 268 transitions, 596 flow. Second operand has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:33,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 268 [2022-11-20 09:27:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:33,098 INFO L130 PetriNetUnfolder]: 0/408 cut-off events. [2022-11-20 09:27:33,099 INFO L131 PetriNetUnfolder]: For 71/71 co-relation queries the response was YES. [2022-11-20 09:27:33,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 408 events. 0/408 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1394 event pairs, 0 based on Foata normal form. 126/520 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2022-11-20 09:27:33,100 INFO L137 encePairwiseOnDemand]: 228/268 looper letters, 6 selfloop transitions, 0 changer transitions 11/227 dead transitions. [2022-11-20 09:27:33,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 526 flow [2022-11-20 09:27:33,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:33,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 488 transitions. [2022-11-20 09:27:33,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9104477611940298 [2022-11-20 09:27:33,102 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 488 transitions. [2022-11-20 09:27:33,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 488 transitions. [2022-11-20 09:27:33,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:33,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 488 transitions. [2022-11-20 09:27:33,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 244.0) internal successors, (488), 2 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,106 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,106 INFO L175 Difference]: Start difference. First operand has 241 places, 268 transitions, 596 flow. Second operand 2 states and 488 transitions. [2022-11-20 09:27:33,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 526 flow [2022-11-20 09:27:33,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 227 transitions, 496 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:33,111 INFO L231 Difference]: Finished difference. Result has 241 places, 216 transitions, 462 flow [2022-11-20 09:27:33,111 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=462, PETRI_PLACES=241, PETRI_TRANSITIONS=216} [2022-11-20 09:27:33,111 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 0 predicate places. [2022-11-20 09:27:33,112 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 216 transitions, 462 flow [2022-11-20 09:27:33,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:33,112 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] [2022-11-20 09:27:33,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 09:27:33,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1369320286, now seen corresponding path program 1 times [2022-11-20 09:27:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:33,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514649983] [2022-11-20 09:27:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:33,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514649983] [2022-11-20 09:27:33,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514649983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:33,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:33,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:33,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660007793] [2022-11-20 09:27:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:33,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:33,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:33,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:33,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:33,150 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 268 [2022-11-20 09:27:33,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 216 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:33,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 268 [2022-11-20 09:27:33,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:33,246 INFO L130 PetriNetUnfolder]: 0/320 cut-off events. [2022-11-20 09:27:33,247 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 09:27:33,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 320 events. 0/320 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 884 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-20 09:27:33,248 INFO L137 encePairwiseOnDemand]: 265/268 looper letters, 15 selfloop transitions, 2 changer transitions 0/220 dead transitions. [2022-11-20 09:27:33,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 220 transitions, 504 flow [2022-11-20 09:27:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 660 transitions. [2022-11-20 09:27:33,250 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8208955223880597 [2022-11-20 09:27:33,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 660 transitions. [2022-11-20 09:27:33,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 660 transitions. [2022-11-20 09:27:33,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:33,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 660 transitions. [2022-11-20 09:27:33,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,255 INFO L175 Difference]: Start difference. First operand has 241 places, 216 transitions, 462 flow. Second operand 3 states and 660 transitions. [2022-11-20 09:27:33,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 220 transitions, 504 flow [2022-11-20 09:27:33,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 220 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:33,260 INFO L231 Difference]: Finished difference. Result has 233 places, 217 transitions, 474 flow [2022-11-20 09:27:33,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=474, PETRI_PLACES=233, PETRI_TRANSITIONS=217} [2022-11-20 09:27:33,261 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -8 predicate places. [2022-11-20 09:27:33,262 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 217 transitions, 474 flow [2022-11-20 09:27:33,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:33,262 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] [2022-11-20 09:27:33,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 09:27:33,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:33,263 INFO L85 PathProgramCache]: Analyzing trace with hash -910210314, now seen corresponding path program 1 times [2022-11-20 09:27:33,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:33,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004049216] [2022-11-20 09:27:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:33,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004049216] [2022-11-20 09:27:33,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004049216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:33,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547558221] [2022-11-20 09:27:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:33,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:33,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:33,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:27:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:33,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:33,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:33,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547558221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:33,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:33,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:33,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337516141] [2022-11-20 09:27:33,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:33,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:33,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:33,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:33,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:33,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-20 09:27:33,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 217 transitions, 474 flow. Second operand has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:33,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-20 09:27:33,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:33,762 INFO L130 PetriNetUnfolder]: 0/298 cut-off events. [2022-11-20 09:27:33,763 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 09:27:33,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 298 events. 0/298 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 753 event pairs, 0 based on Foata normal form. 2/300 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 09:27:33,764 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 16 selfloop transitions, 9 changer transitions 0/227 dead transitions. [2022-11-20 09:27:33,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 227 transitions, 546 flow [2022-11-20 09:27:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1944 transitions. [2022-11-20 09:27:33,771 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059701492537313 [2022-11-20 09:27:33,771 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1944 transitions. [2022-11-20 09:27:33,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1944 transitions. [2022-11-20 09:27:33,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:33,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1944 transitions. [2022-11-20 09:27:33,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,785 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,785 INFO L175 Difference]: Start difference. First operand has 233 places, 217 transitions, 474 flow. Second operand 9 states and 1944 transitions. [2022-11-20 09:27:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 227 transitions, 546 flow [2022-11-20 09:27:33,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 227 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:33,790 INFO L231 Difference]: Finished difference. Result has 243 places, 223 transitions, 522 flow [2022-11-20 09:27:33,791 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=522, PETRI_PLACES=243, PETRI_TRANSITIONS=223} [2022-11-20 09:27:33,792 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 2 predicate places. [2022-11-20 09:27:33,792 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 223 transitions, 522 flow [2022-11-20 09:27:33,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 215.3) internal successors, (2153), 10 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:33,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:33,794 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:33,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:34,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 09:27:34,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1557677727, now seen corresponding path program 1 times [2022-11-20 09:27:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:34,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169194285] [2022-11-20 09:27:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:34,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:34,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:34,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169194285] [2022-11-20 09:27:34,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169194285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:34,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584736304] [2022-11-20 09:27:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:34,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:34,149 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:34,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:27:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:34,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:34,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584736304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:34,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:34,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929985177] [2022-11-20 09:27:34,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:34,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 268 [2022-11-20 09:27:34,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 223 transitions, 522 flow. Second operand has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:34,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:34,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 268 [2022-11-20 09:27:34,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:34,787 INFO L130 PetriNetUnfolder]: 0/254 cut-off events. [2022-11-20 09:27:34,788 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 09:27:34,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 254 events. 0/254 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/258 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-20 09:27:34,789 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 21 selfloop transitions, 19 changer transitions 0/232 dead transitions. [2022-11-20 09:27:34,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 232 transitions, 660 flow [2022-11-20 09:27:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4517 transitions. [2022-11-20 09:27:34,797 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025941719971571 [2022-11-20 09:27:34,797 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4517 transitions. [2022-11-20 09:27:34,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4517 transitions. [2022-11-20 09:27:34,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:34,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4517 transitions. [2022-11-20 09:27:34,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 215.0952380952381) internal successors, (4517), 21 states have internal predecessors, (4517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:34,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:34,821 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:34,821 INFO L175 Difference]: Start difference. First operand has 243 places, 223 transitions, 522 flow. Second operand 21 states and 4517 transitions. [2022-11-20 09:27:34,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 232 transitions, 660 flow [2022-11-20 09:27:34,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 232 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-20 09:27:34,826 INFO L231 Difference]: Finished difference. Result has 248 places, 221 transitions, 558 flow [2022-11-20 09:27:34,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=248, PETRI_TRANSITIONS=221} [2022-11-20 09:27:34,828 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 7 predicate places. [2022-11-20 09:27:34,828 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 221 transitions, 558 flow [2022-11-20 09:27:34,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 215.61111111111111) internal successors, (3881), 18 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:34,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:34,830 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:34,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:35,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:35,036 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1257008543, now seen corresponding path program 1 times [2022-11-20 09:27:35,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737184951] [2022-11-20 09:27:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:35,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:35,121 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:35,121 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:35,122 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:35,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:35,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 09:27:35,122 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 09:27:35,125 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:35,126 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-20 09:27:35,163 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:35,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 270 places, 301 transitions, 679 flow [2022-11-20 09:27:35,274 INFO L130 PetriNetUnfolder]: 74/548 cut-off events. [2022-11-20 09:27:35,275 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-20 09:27:35,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 548 events. 74/548 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1836 event pairs, 0 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 505. Up to 16 conditions per place. [2022-11-20 09:27:35,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 270 places, 301 transitions, 679 flow [2022-11-20 09:27:35,298 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 270 places, 301 transitions, 679 flow [2022-11-20 09:27:35,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:35,299 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:35,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:35,306 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:35,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:35,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:35,306 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] [2022-11-20 09:27:35,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1975059873, now seen corresponding path program 1 times [2022-11-20 09:27:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867913496] [2022-11-20 09:27:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:35,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867913496] [2022-11-20 09:27:35,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867913496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:35,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:35,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:35,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808263238] [2022-11-20 09:27:35,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:35,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:35,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:35,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 301 [2022-11-20 09:27:35,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 301 transitions, 679 flow. Second operand has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:35,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 301 [2022-11-20 09:27:35,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:35,439 INFO L130 PetriNetUnfolder]: 0/466 cut-off events. [2022-11-20 09:27:35,439 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-20 09:27:35,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 466 events. 0/466 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1641 event pairs, 0 based on Foata normal form. 166/616 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2022-11-20 09:27:35,441 INFO L137 encePairwiseOnDemand]: 255/301 looper letters, 7 selfloop transitions, 0 changer transitions 11/254 dead transitions. [2022-11-20 09:27:35,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 599 flow [2022-11-20 09:27:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:35,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 547 transitions. [2022-11-20 09:27:35,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9086378737541528 [2022-11-20 09:27:35,443 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 547 transitions. [2022-11-20 09:27:35,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 547 transitions. [2022-11-20 09:27:35,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:35,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 547 transitions. [2022-11-20 09:27:35,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,446 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,446 INFO L175 Difference]: Start difference. First operand has 270 places, 301 transitions, 679 flow. Second operand 2 states and 547 transitions. [2022-11-20 09:27:35,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 599 flow [2022-11-20 09:27:35,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 254 transitions, 557 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:35,452 INFO L231 Difference]: Finished difference. Result has 270 places, 243 transitions, 521 flow [2022-11-20 09:27:35,452 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=521, PETRI_PLACES=270, PETRI_TRANSITIONS=243} [2022-11-20 09:27:35,453 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 0 predicate places. [2022-11-20 09:27:35,453 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 243 transitions, 521 flow [2022-11-20 09:27:35,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 247.5) internal successors, (495), 2 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:35,453 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] [2022-11-20 09:27:35,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 09:27:35,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,454 INFO L85 PathProgramCache]: Analyzing trace with hash 178108514, now seen corresponding path program 1 times [2022-11-20 09:27:35,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037797159] [2022-11-20 09:27:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:35,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037797159] [2022-11-20 09:27:35,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037797159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:35,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:35,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48039878] [2022-11-20 09:27:35,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:35,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:35,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:35,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 301 [2022-11-20 09:27:35,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 243 transitions, 521 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:35,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 301 [2022-11-20 09:27:35,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:35,618 INFO L130 PetriNetUnfolder]: 0/367 cut-off events. [2022-11-20 09:27:35,618 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 09:27:35,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 367 events. 0/367 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1055 event pairs, 0 based on Foata normal form. 0/360 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-20 09:27:35,620 INFO L137 encePairwiseOnDemand]: 298/301 looper letters, 16 selfloop transitions, 2 changer transitions 0/247 dead transitions. [2022-11-20 09:27:35,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 247 transitions, 565 flow [2022-11-20 09:27:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 739 transitions. [2022-11-20 09:27:35,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8183831672203765 [2022-11-20 09:27:35,622 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 739 transitions. [2022-11-20 09:27:35,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 739 transitions. [2022-11-20 09:27:35,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:35,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 739 transitions. [2022-11-20 09:27:35,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 301.0) internal successors, (1204), 4 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,627 INFO L175 Difference]: Start difference. First operand has 270 places, 243 transitions, 521 flow. Second operand 3 states and 739 transitions. [2022-11-20 09:27:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 247 transitions, 565 flow [2022-11-20 09:27:35,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 247 transitions, 565 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:35,632 INFO L231 Difference]: Finished difference. Result has 262 places, 244 transitions, 533 flow [2022-11-20 09:27:35,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=533, PETRI_PLACES=262, PETRI_TRANSITIONS=244} [2022-11-20 09:27:35,633 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, -8 predicate places. [2022-11-20 09:27:35,633 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 244 transitions, 533 flow [2022-11-20 09:27:35,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:35,634 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] [2022-11-20 09:27:35,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 09:27:35,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:35,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash -612046090, now seen corresponding path program 1 times [2022-11-20 09:27:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200990039] [2022-11-20 09:27:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:35,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200990039] [2022-11-20 09:27:35,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200990039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:35,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980808620] [2022-11-20 09:27:35,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:35,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:35,694 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:35,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:27:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:35,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:35,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:35,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:35,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980808620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:35,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:35,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:35,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385675510] [2022-11-20 09:27:35,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:35,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:35,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-20 09:27:35,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 244 transitions, 533 flow. Second operand has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:35,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:35,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-20 09:27:35,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:36,130 INFO L130 PetriNetUnfolder]: 0/345 cut-off events. [2022-11-20 09:27:36,130 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-20 09:27:36,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 345 events. 0/345 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 920 event pairs, 0 based on Foata normal form. 2/347 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 09:27:36,132 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2022-11-20 09:27:36,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 254 transitions, 607 flow [2022-11-20 09:27:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:36,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2179 transitions. [2022-11-20 09:27:36,136 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8043558508674787 [2022-11-20 09:27:36,136 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2179 transitions. [2022-11-20 09:27:36,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2179 transitions. [2022-11-20 09:27:36,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:36,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2179 transitions. [2022-11-20 09:27:36,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 242.11111111111111) internal successors, (2179), 9 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,147 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 301.0) internal successors, (3010), 10 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,147 INFO L175 Difference]: Start difference. First operand has 262 places, 244 transitions, 533 flow. Second operand 9 states and 2179 transitions. [2022-11-20 09:27:36,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 254 transitions, 607 flow [2022-11-20 09:27:36,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 254 transitions, 605 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:36,153 INFO L231 Difference]: Finished difference. Result has 272 places, 250 transitions, 581 flow [2022-11-20 09:27:36,154 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=272, PETRI_TRANSITIONS=250} [2022-11-20 09:27:36,154 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 2 predicate places. [2022-11-20 09:27:36,155 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 250 transitions, 581 flow [2022-11-20 09:27:36,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 241.3) internal successors, (2413), 10 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:36,156 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:36,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:36,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 09:27:36,362 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash 289006049, now seen corresponding path program 1 times [2022-11-20 09:27:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:36,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859775085] [2022-11-20 09:27:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:36,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:36,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859775085] [2022-11-20 09:27:36,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859775085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:36,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043454454] [2022-11-20 09:27:36,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:36,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:36,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:36,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:27:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:36,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:36,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:36,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043454454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:36,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:36,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168445753] [2022-11-20 09:27:36,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:36,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:36,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:36,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 301 [2022-11-20 09:27:36,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 250 transitions, 581 flow. Second operand has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:36,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:36,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 301 [2022-11-20 09:27:36,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:37,188 INFO L130 PetriNetUnfolder]: 0/301 cut-off events. [2022-11-20 09:27:37,188 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 09:27:37,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 301 events. 0/301 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 634 event pairs, 0 based on Foata normal form. 4/305 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 09:27:37,189 INFO L137 encePairwiseOnDemand]: 295/301 looper letters, 25 selfloop transitions, 21 changer transitions 0/274 dead transitions. [2022-11-20 09:27:37,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 274 transitions, 781 flow [2022-11-20 09:27:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:37,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:37,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5069 transitions. [2022-11-20 09:27:37,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8019300743553235 [2022-11-20 09:27:37,197 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5069 transitions. [2022-11-20 09:27:37,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5069 transitions. [2022-11-20 09:27:37,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:37,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5069 transitions. [2022-11-20 09:27:37,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 241.38095238095238) internal successors, (5069), 21 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,219 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 301.0) internal successors, (6622), 22 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,219 INFO L175 Difference]: Start difference. First operand has 272 places, 250 transitions, 581 flow. Second operand 21 states and 5069 transitions. [2022-11-20 09:27:37,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 274 transitions, 781 flow [2022-11-20 09:27:37,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 274 transitions, 767 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:37,225 INFO L231 Difference]: Finished difference. Result has 296 places, 263 transitions, 705 flow [2022-11-20 09:27:37,226 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=301, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=705, PETRI_PLACES=296, PETRI_TRANSITIONS=263} [2022-11-20 09:27:37,226 INFO L288 CegarLoopForPetriNet]: 270 programPoint places, 26 predicate places. [2022-11-20 09:27:37,226 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 263 transitions, 705 flow [2022-11-20 09:27:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 241.61111111111111) internal successors, (4349), 18 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:37,228 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:37,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:37,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:37,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash -143485893, now seen corresponding path program 1 times [2022-11-20 09:27:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19947536] [2022-11-20 09:27:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:37,458 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:37,484 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:37,485 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:37,485 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:37,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:37,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 09:27:37,486 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 09:27:37,486 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:37,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-20 09:27:37,516 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:37,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 299 places, 334 transitions, 764 flow [2022-11-20 09:27:37,684 INFO L130 PetriNetUnfolder]: 84/617 cut-off events. [2022-11-20 09:27:37,684 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-20 09:27:37,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 617 events. 84/617 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2097 event pairs, 0 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 582. Up to 18 conditions per place. [2022-11-20 09:27:37,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 299 places, 334 transitions, 764 flow [2022-11-20 09:27:37,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 299 places, 334 transitions, 764 flow [2022-11-20 09:27:37,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:37,708 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:37,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:37,715 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:37,716 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:37,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:37,716 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] [2022-11-20 09:27:37,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1651674145, now seen corresponding path program 1 times [2022-11-20 09:27:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:37,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768805989] [2022-11-20 09:27:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:37,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768805989] [2022-11-20 09:27:37,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768805989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:37,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:37,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:37,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447198191] [2022-11-20 09:27:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:37,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:37,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 334 [2022-11-20 09:27:37,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 334 transitions, 764 flow. Second operand has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:37,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 334 [2022-11-20 09:27:37,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:37,890 INFO L130 PetriNetUnfolder]: 0/524 cut-off events. [2022-11-20 09:27:37,890 INFO L131 PetriNetUnfolder]: For 148/148 co-relation queries the response was YES. [2022-11-20 09:27:37,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 524 events. 0/524 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1888 event pairs, 0 based on Foata normal form. 212/718 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2022-11-20 09:27:37,892 INFO L137 encePairwiseOnDemand]: 282/334 looper letters, 8 selfloop transitions, 0 changer transitions 11/281 dead transitions. [2022-11-20 09:27:37,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 281 transitions, 674 flow [2022-11-20 09:27:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:37,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 606 transitions. [2022-11-20 09:27:37,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.907185628742515 [2022-11-20 09:27:37,894 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 606 transitions. [2022-11-20 09:27:37,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 606 transitions. [2022-11-20 09:27:37,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:37,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 606 transitions. [2022-11-20 09:27:37,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 303.0) internal successors, (606), 2 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,897 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,898 INFO L175 Difference]: Start difference. First operand has 299 places, 334 transitions, 764 flow. Second operand 2 states and 606 transitions. [2022-11-20 09:27:37,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 281 transitions, 674 flow [2022-11-20 09:27:37,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 281 transitions, 618 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:37,903 INFO L231 Difference]: Finished difference. Result has 299 places, 270 transitions, 580 flow [2022-11-20 09:27:37,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=580, PETRI_PLACES=299, PETRI_TRANSITIONS=270} [2022-11-20 09:27:37,904 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 0 predicate places. [2022-11-20 09:27:37,904 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 270 transitions, 580 flow [2022-11-20 09:27:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 273.5) internal successors, (547), 2 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:37,905 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] [2022-11-20 09:27:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 09:27:37,905 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:37,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:37,906 INFO L85 PathProgramCache]: Analyzing trace with hash -145277214, now seen corresponding path program 1 times [2022-11-20 09:27:37,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:37,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712736738] [2022-11-20 09:27:37,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:37,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:37,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712736738] [2022-11-20 09:27:37,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712736738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:37,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:37,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013581257] [2022-11-20 09:27:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:37,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 334 [2022-11-20 09:27:37,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 270 transitions, 580 flow. Second operand has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:37,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:37,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 334 [2022-11-20 09:27:37,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:38,066 INFO L130 PetriNetUnfolder]: 0/414 cut-off events. [2022-11-20 09:27:38,067 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 09:27:38,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 414 events. 0/414 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1228 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 0. Up to 48 conditions per place. [2022-11-20 09:27:38,068 INFO L137 encePairwiseOnDemand]: 331/334 looper letters, 17 selfloop transitions, 2 changer transitions 0/274 dead transitions. [2022-11-20 09:27:38,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 274 transitions, 626 flow [2022-11-20 09:27:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2022-11-20 09:27:38,070 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8163672654690619 [2022-11-20 09:27:38,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2022-11-20 09:27:38,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2022-11-20 09:27:38,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:38,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2022-11-20 09:27:38,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,075 INFO L175 Difference]: Start difference. First operand has 299 places, 270 transitions, 580 flow. Second operand 3 states and 818 transitions. [2022-11-20 09:27:38,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 274 transitions, 626 flow [2022-11-20 09:27:38,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 274 transitions, 626 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:38,081 INFO L231 Difference]: Finished difference. Result has 291 places, 271 transitions, 592 flow [2022-11-20 09:27:38,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=592, PETRI_PLACES=291, PETRI_TRANSITIONS=271} [2022-11-20 09:27:38,082 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, -8 predicate places. [2022-11-20 09:27:38,082 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 271 transitions, 592 flow [2022-11-20 09:27:38,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,082 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:38,083 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] [2022-11-20 09:27:38,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 09:27:38,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:38,083 INFO L85 PathProgramCache]: Analyzing trace with hash 878346838, now seen corresponding path program 1 times [2022-11-20 09:27:38,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:38,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260891728] [2022-11-20 09:27:38,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:38,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260891728] [2022-11-20 09:27:38,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260891728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:38,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453021291] [2022-11-20 09:27:38,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:38,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:38,140 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:27:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:38,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:38,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:38,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453021291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:38,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:38,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:38,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467569806] [2022-11-20 09:27:38,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:38,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-20 09:27:38,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 271 transitions, 592 flow. Second operand has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:38,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-20 09:27:38,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:38,569 INFO L130 PetriNetUnfolder]: 0/392 cut-off events. [2022-11-20 09:27:38,569 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 09:27:38,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 392 events. 0/392 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1098 event pairs, 0 based on Foata normal form. 2/394 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 09:27:38,571 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 18 selfloop transitions, 9 changer transitions 0/281 dead transitions. [2022-11-20 09:27:38,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 281 transitions, 668 flow [2022-11-20 09:27:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:38,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2414 transitions. [2022-11-20 09:27:38,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8030605455755156 [2022-11-20 09:27:38,575 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2414 transitions. [2022-11-20 09:27:38,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2414 transitions. [2022-11-20 09:27:38,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:38,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2414 transitions. [2022-11-20 09:27:38,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 268.22222222222223) internal successors, (2414), 9 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,586 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 334.0) internal successors, (3340), 10 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,587 INFO L175 Difference]: Start difference. First operand has 291 places, 271 transitions, 592 flow. Second operand 9 states and 2414 transitions. [2022-11-20 09:27:38,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 281 transitions, 668 flow [2022-11-20 09:27:38,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 281 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:38,593 INFO L231 Difference]: Finished difference. Result has 301 places, 277 transitions, 640 flow [2022-11-20 09:27:38,593 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=301, PETRI_TRANSITIONS=277} [2022-11-20 09:27:38,594 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 2 predicate places. [2022-11-20 09:27:38,594 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 277 transitions, 640 flow [2022-11-20 09:27:38,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 267.3) internal successors, (2673), 10 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:38,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:38,596 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:38,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:38,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 09:27:38,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:38,802 INFO L85 PathProgramCache]: Analyzing trace with hash -776023295, now seen corresponding path program 1 times [2022-11-20 09:27:38,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:38,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005597897] [2022-11-20 09:27:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:38,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:38,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005597897] [2022-11-20 09:27:38,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005597897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:38,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568535826] [2022-11-20 09:27:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:38,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:38,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:38,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:27:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:39,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:39,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568535826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:39,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:39,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216632904] [2022-11-20 09:27:39,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:39,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-20 09:27:39,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 277 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:39,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:39,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-20 09:27:39,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:39,619 INFO L130 PetriNetUnfolder]: 0/348 cut-off events. [2022-11-20 09:27:39,619 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 09:27:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504 conditions, 348 events. 0/348 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 804 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 09:27:39,620 INFO L137 encePairwiseOnDemand]: 328/334 looper letters, 26 selfloop transitions, 21 changer transitions 0/301 dead transitions. [2022-11-20 09:27:39,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 301 transitions, 842 flow [2022-11-20 09:27:39,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:39,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5616 transitions. [2022-11-20 09:27:39,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8006843455945253 [2022-11-20 09:27:39,630 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5616 transitions. [2022-11-20 09:27:39,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5616 transitions. [2022-11-20 09:27:39,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:39,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5616 transitions. [2022-11-20 09:27:39,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 267.42857142857144) internal successors, (5616), 21 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:39,656 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 334.0) internal successors, (7348), 22 states have internal predecessors, (7348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:39,656 INFO L175 Difference]: Start difference. First operand has 301 places, 277 transitions, 640 flow. Second operand 21 states and 5616 transitions. [2022-11-20 09:27:39,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 301 transitions, 842 flow [2022-11-20 09:27:39,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 301 transitions, 828 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:39,663 INFO L231 Difference]: Finished difference. Result has 325 places, 290 transitions, 764 flow [2022-11-20 09:27:39,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=325, PETRI_TRANSITIONS=290} [2022-11-20 09:27:39,664 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 26 predicate places. [2022-11-20 09:27:39,664 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 290 transitions, 764 flow [2022-11-20 09:27:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 267.6111111111111) internal successors, (4817), 18 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:39,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:39,666 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:39,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:39,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 09:27:39,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:39,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1408771997, now seen corresponding path program 1 times [2022-11-20 09:27:39,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:39,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168090351] [2022-11-20 09:27:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:39,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168090351] [2022-11-20 09:27:40,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168090351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461428658] [2022-11-20 09:27:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:40,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:40,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:40,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:40,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:27:40,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:40,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:40,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461428658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:40,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:40,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:27:40,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637309110] [2022-11-20 09:27:40,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:40,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:27:40,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:27:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:27:40,942 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 265 out of 334 [2022-11-20 09:27:40,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 290 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:40,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:40,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 265 of 334 [2022-11-20 09:27:40,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:41,381 INFO L130 PetriNetUnfolder]: 0/326 cut-off events. [2022-11-20 09:27:41,382 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-20 09:27:41,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 326 events. 0/326 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 09:27:41,383 INFO L137 encePairwiseOnDemand]: 329/334 looper letters, 27 selfloop transitions, 25 changer transitions 0/296 dead transitions. [2022-11-20 09:27:41,383 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 296 transitions, 912 flow [2022-11-20 09:27:41,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 09:27:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 09:27:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7209 transitions. [2022-11-20 09:27:41,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7994011976047904 [2022-11-20 09:27:41,391 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7209 transitions. [2022-11-20 09:27:41,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7209 transitions. [2022-11-20 09:27:41,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:41,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7209 transitions. [2022-11-20 09:27:41,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 267.0) internal successors, (7209), 27 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:41,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:41,416 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 334.0) internal successors, (9352), 28 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:41,417 INFO L175 Difference]: Start difference. First operand has 325 places, 290 transitions, 764 flow. Second operand 27 states and 7209 transitions. [2022-11-20 09:27:41,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 296 transitions, 912 flow [2022-11-20 09:27:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 296 transitions, 858 flow, removed 7 selfloop flow, removed 13 redundant places. [2022-11-20 09:27:41,424 INFO L231 Difference]: Finished difference. Result has 327 places, 282 transitions, 751 flow [2022-11-20 09:27:41,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=334, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=751, PETRI_PLACES=327, PETRI_TRANSITIONS=282} [2022-11-20 09:27:41,425 INFO L288 CegarLoopForPetriNet]: 299 programPoint places, 28 predicate places. [2022-11-20 09:27:41,425 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 282 transitions, 751 flow [2022-11-20 09:27:41,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 267.79411764705884) internal successors, (9105), 34 states have internal predecessors, (9105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:41,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:41,427 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:41,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 09:27:41,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:41,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash 22455350, now seen corresponding path program 1 times [2022-11-20 09:27:41,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:41,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130556120] [2022-11-20 09:27:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:41,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:41,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:41,688 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:41,688 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:41,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-20 09:27:41,688 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:27:41,689 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:41,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-11-20 09:27:41,723 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 328 places, 367 transitions, 851 flow [2022-11-20 09:27:41,893 INFO L130 PetriNetUnfolder]: 94/686 cut-off events. [2022-11-20 09:27:41,893 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-20 09:27:41,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 686 events. 94/686 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2344 event pairs, 0 based on Foata normal form. 0/572 useless extension candidates. Maximal degree in co-relation 660. Up to 20 conditions per place. [2022-11-20 09:27:41,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 328 places, 367 transitions, 851 flow [2022-11-20 09:27:41,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 328 places, 367 transitions, 851 flow [2022-11-20 09:27:41,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:41,929 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:41,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:41,935 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:41,935 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:41,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:41,935 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] [2022-11-20 09:27:41,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -542526111, now seen corresponding path program 1 times [2022-11-20 09:27:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:41,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231617272] [2022-11-20 09:27:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:41,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:41,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231617272] [2022-11-20 09:27:41,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231617272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:41,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:41,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:41,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128204602] [2022-11-20 09:27:41,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:41,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:41,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:41,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 299 out of 367 [2022-11-20 09:27:41,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 851 flow. Second operand has 2 states, 2 states have (on average 299.5) internal successors, (599), 2 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:41,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:41,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 299 of 367 [2022-11-20 09:27:41,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:42,207 INFO L130 PetriNetUnfolder]: 0/582 cut-off events. [2022-11-20 09:27:42,207 INFO L131 PetriNetUnfolder]: For 201/201 co-relation queries the response was YES. [2022-11-20 09:27:42,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 665 conditions, 582 events. 0/582 cut-off events. For 201/201 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2145 event pairs, 0 based on Foata normal form. 264/826 useless extension candidates. Maximal degree in co-relation 0. Up to 10 conditions per place. [2022-11-20 09:27:42,209 INFO L137 encePairwiseOnDemand]: 309/367 looper letters, 9 selfloop transitions, 0 changer transitions 11/308 dead transitions. [2022-11-20 09:27:42,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 308 transitions, 751 flow [2022-11-20 09:27:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 665 transitions. [2022-11-20 09:27:42,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9059945504087193 [2022-11-20 09:27:42,212 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 665 transitions. [2022-11-20 09:27:42,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 665 transitions. [2022-11-20 09:27:42,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:42,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 665 transitions. [2022-11-20 09:27:42,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 332.5) internal successors, (665), 2 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 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) [2022-11-20 09:27:42,218 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 367.0) internal successors, (1101), 3 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) [2022-11-20 09:27:42,218 INFO L175 Difference]: Start difference. First operand has 328 places, 367 transitions, 851 flow. Second operand 2 states and 665 transitions. [2022-11-20 09:27:42,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 308 transitions, 751 flow [2022-11-20 09:27:42,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 308 transitions, 679 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:42,228 INFO L231 Difference]: Finished difference. Result has 328 places, 297 transitions, 639 flow [2022-11-20 09:27:42,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=639, PETRI_PLACES=328, PETRI_TRANSITIONS=297} [2022-11-20 09:27:42,229 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 0 predicate places. [2022-11-20 09:27:42,229 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 297 transitions, 639 flow [2022-11-20 09:27:42,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 299.5) internal successors, (599), 2 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:42,230 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] [2022-11-20 09:27:42,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-20 09:27:42,231 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:42,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:42,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1955489826, now seen corresponding path program 1 times [2022-11-20 09:27:42,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:42,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517289950] [2022-11-20 09:27:42,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:42,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:42,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517289950] [2022-11-20 09:27:42,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517289950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:42,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:42,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:42,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522504955] [2022-11-20 09:27:42,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:42,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:42,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:42,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 292 out of 367 [2022-11-20 09:27:42,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 297 transitions, 639 flow. Second operand has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:42,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 292 of 367 [2022-11-20 09:27:42,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:42,439 INFO L130 PetriNetUnfolder]: 0/461 cut-off events. [2022-11-20 09:27:42,439 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 09:27:42,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 461 events. 0/461 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1397 event pairs, 0 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-20 09:27:42,441 INFO L137 encePairwiseOnDemand]: 364/367 looper letters, 18 selfloop transitions, 2 changer transitions 0/301 dead transitions. [2022-11-20 09:27:42,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 301 transitions, 687 flow [2022-11-20 09:27:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 897 transitions. [2022-11-20 09:27:42,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8147138964577657 [2022-11-20 09:27:42,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 897 transitions. [2022-11-20 09:27:42,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 897 transitions. [2022-11-20 09:27:42,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:42,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 897 transitions. [2022-11-20 09:27:42,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,450 INFO L175 Difference]: Start difference. First operand has 328 places, 297 transitions, 639 flow. Second operand 3 states and 897 transitions. [2022-11-20 09:27:42,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 301 transitions, 687 flow [2022-11-20 09:27:42,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 301 transitions, 687 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:42,456 INFO L231 Difference]: Finished difference. Result has 320 places, 298 transitions, 651 flow [2022-11-20 09:27:42,457 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=651, PETRI_PLACES=320, PETRI_TRANSITIONS=298} [2022-11-20 09:27:42,458 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, -8 predicate places. [2022-11-20 09:27:42,458 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 298 transitions, 651 flow [2022-11-20 09:27:42,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:42,459 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] [2022-11-20 09:27:42,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-20 09:27:42,460 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:42,460 INFO L85 PathProgramCache]: Analyzing trace with hash -733998826, now seen corresponding path program 1 times [2022-11-20 09:27:42,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:42,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415393992] [2022-11-20 09:27:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:42,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:42,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:42,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415393992] [2022-11-20 09:27:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415393992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:42,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871395666] [2022-11-20 09:27:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:42,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:42,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:42,517 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:27:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:42,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:42,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871395666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:42,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:42,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005800964] [2022-11-20 09:27:42,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:42,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:42,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:42,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-20 09:27:42,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 298 transitions, 651 flow. Second operand has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:42,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:42,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-20 09:27:42,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:43,016 INFO L130 PetriNetUnfolder]: 0/439 cut-off events. [2022-11-20 09:27:43,017 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 09:27:43,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 439 events. 0/439 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1262 event pairs, 0 based on Foata normal form. 2/441 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 09:27:43,018 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 19 selfloop transitions, 9 changer transitions 0/308 dead transitions. [2022-11-20 09:27:43,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 308 transitions, 729 flow [2022-11-20 09:27:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2649 transitions. [2022-11-20 09:27:43,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8019981834695731 [2022-11-20 09:27:43,023 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2649 transitions. [2022-11-20 09:27:43,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2649 transitions. [2022-11-20 09:27:43,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:43,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2649 transitions. [2022-11-20 09:27:43,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 294.3333333333333) internal successors, (2649), 9 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:43,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:43,032 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 367.0) internal successors, (3670), 10 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:43,033 INFO L175 Difference]: Start difference. First operand has 320 places, 298 transitions, 651 flow. Second operand 9 states and 2649 transitions. [2022-11-20 09:27:43,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 308 transitions, 729 flow [2022-11-20 09:27:43,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 308 transitions, 727 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:43,038 INFO L231 Difference]: Finished difference. Result has 330 places, 304 transitions, 699 flow [2022-11-20 09:27:43,039 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=699, PETRI_PLACES=330, PETRI_TRANSITIONS=304} [2022-11-20 09:27:43,039 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 2 predicate places. [2022-11-20 09:27:43,039 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 304 transitions, 699 flow [2022-11-20 09:27:43,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 293.3) internal successors, (2933), 10 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:43,040 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:43,040 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:43,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:43,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-20 09:27:43,246 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:43,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:43,247 INFO L85 PathProgramCache]: Analyzing trace with hash -457798463, now seen corresponding path program 1 times [2022-11-20 09:27:43,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:43,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573089888] [2022-11-20 09:27:43,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:43,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573089888] [2022-11-20 09:27:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573089888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256922261] [2022-11-20 09:27:43,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:43,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:43,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:43,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 09:27:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:43,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:43,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:43,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256922261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:43,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:43,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:43,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959312825] [2022-11-20 09:27:43,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:43,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:43,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:43,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-20 09:27:43,788 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 304 transitions, 699 flow. Second operand has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:43,788 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:43,788 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-20 09:27:43,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:44,146 INFO L130 PetriNetUnfolder]: 0/395 cut-off events. [2022-11-20 09:27:44,146 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 09:27:44,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 395 events. 0/395 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 974 event pairs, 0 based on Foata normal form. 4/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 09:27:44,147 INFO L137 encePairwiseOnDemand]: 361/367 looper letters, 27 selfloop transitions, 21 changer transitions 0/328 dead transitions. [2022-11-20 09:27:44,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 328 transitions, 903 flow [2022-11-20 09:27:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6163 transitions. [2022-11-20 09:27:44,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7996626443492929 [2022-11-20 09:27:44,161 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6163 transitions. [2022-11-20 09:27:44,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6163 transitions. [2022-11-20 09:27:44,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:44,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6163 transitions. [2022-11-20 09:27:44,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 293.4761904761905) internal successors, (6163), 21 states have internal predecessors, (6163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:44,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:44,187 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 367.0) internal successors, (8074), 22 states have internal predecessors, (8074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:44,187 INFO L175 Difference]: Start difference. First operand has 330 places, 304 transitions, 699 flow. Second operand 21 states and 6163 transitions. [2022-11-20 09:27:44,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 328 transitions, 903 flow [2022-11-20 09:27:44,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 328 transitions, 889 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:44,194 INFO L231 Difference]: Finished difference. Result has 354 places, 317 transitions, 823 flow [2022-11-20 09:27:44,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=823, PETRI_PLACES=354, PETRI_TRANSITIONS=317} [2022-11-20 09:27:44,195 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 26 predicate places. [2022-11-20 09:27:44,196 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 317 transitions, 823 flow [2022-11-20 09:27:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 293.6111111111111) internal successors, (5285), 18 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:44,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:44,197 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:44,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:44,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:44,408 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash 110716963, now seen corresponding path program 1 times [2022-11-20 09:27:44,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:44,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523278625] [2022-11-20 09:27:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:44,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:44,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523278625] [2022-11-20 09:27:44,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523278625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:44,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170155595] [2022-11-20 09:27:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:44,736 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:44,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 09:27:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:45,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170155595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:45,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:45,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:27:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441360658] [2022-11-20 09:27:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:45,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:27:45,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:27:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:27:45,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 291 out of 367 [2022-11-20 09:27:45,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 317 transitions, 823 flow. Second operand has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:45,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:45,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 291 of 367 [2022-11-20 09:27:45,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:45,946 INFO L130 PetriNetUnfolder]: 0/362 cut-off events. [2022-11-20 09:27:45,947 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2022-11-20 09:27:45,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 362 events. 0/362 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 09:27:45,948 INFO L137 encePairwiseOnDemand]: 362/367 looper letters, 30 selfloop transitions, 28 changer transitions 0/328 dead transitions. [2022-11-20 09:27:45,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 328 transitions, 1017 flow [2022-11-20 09:27:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 09:27:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-20 09:27:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8791 transitions. [2022-11-20 09:27:45,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.798455949137148 [2022-11-20 09:27:45,960 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8791 transitions. [2022-11-20 09:27:45,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8791 transitions. [2022-11-20 09:27:45,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:45,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8791 transitions. [2022-11-20 09:27:45,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 293.03333333333336) internal successors, (8791), 30 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:45,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:45,993 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 367.0) internal successors, (11377), 31 states have internal predecessors, (11377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:45,993 INFO L175 Difference]: Start difference. First operand has 354 places, 317 transitions, 823 flow. Second operand 30 states and 8791 transitions. [2022-11-20 09:27:45,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 328 transitions, 1017 flow [2022-11-20 09:27:45,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 328 transitions, 957 flow, removed 8 selfloop flow, removed 13 redundant places. [2022-11-20 09:27:46,001 INFO L231 Difference]: Finished difference. Result has 359 places, 312 transitions, 834 flow [2022-11-20 09:27:46,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=834, PETRI_PLACES=359, PETRI_TRANSITIONS=312} [2022-11-20 09:27:46,002 INFO L288 CegarLoopForPetriNet]: 328 programPoint places, 31 predicate places. [2022-11-20 09:27:46,002 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 312 transitions, 834 flow [2022-11-20 09:27:46,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 293.79411764705884) internal successors, (9989), 34 states have internal predecessors, (9989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,004 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:46,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-20 09:27:46,210 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash -209069326, now seen corresponding path program 1 times [2022-11-20 09:27:46,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046316062] [2022-11-20 09:27:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:46,236 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:46,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:46,274 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:46,275 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:46,275 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:46,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-20 09:27:46,275 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:27:46,276 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:46,276 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-11-20 09:27:46,314 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:46,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 357 places, 400 transitions, 940 flow [2022-11-20 09:27:46,539 INFO L130 PetriNetUnfolder]: 104/755 cut-off events. [2022-11-20 09:27:46,539 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-20 09:27:46,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 755 events. 104/755 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2599 event pairs, 0 based on Foata normal form. 0/629 useless extension candidates. Maximal degree in co-relation 739. Up to 22 conditions per place. [2022-11-20 09:27:46,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 357 places, 400 transitions, 940 flow [2022-11-20 09:27:46,579 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 357 places, 400 transitions, 940 flow [2022-11-20 09:27:46,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:46,581 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:46,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:46,587 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:46,587 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:46,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,588 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] [2022-11-20 09:27:46,588 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,588 INFO L85 PathProgramCache]: Analyzing trace with hash -312573599, now seen corresponding path program 1 times [2022-11-20 09:27:46,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652186552] [2022-11-20 09:27:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:46,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:46,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652186552] [2022-11-20 09:27:46,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652186552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:46,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:46,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:46,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868883244] [2022-11-20 09:27:46,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:46,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:46,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:46,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:46,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 400 [2022-11-20 09:27:46,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 400 transitions, 940 flow. Second operand has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:46,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 400 [2022-11-20 09:27:46,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:46,896 INFO L130 PetriNetUnfolder]: 0/640 cut-off events. [2022-11-20 09:27:46,896 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-11-20 09:27:46,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 640 events. 0/640 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2382 event pairs, 0 based on Foata normal form. 322/940 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2022-11-20 09:27:46,901 INFO L137 encePairwiseOnDemand]: 336/400 looper letters, 10 selfloop transitions, 0 changer transitions 11/335 dead transitions. [2022-11-20 09:27:46,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 830 flow [2022-11-20 09:27:46,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 724 transitions. [2022-11-20 09:27:46,904 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.905 [2022-11-20 09:27:46,904 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 724 transitions. [2022-11-20 09:27:46,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 724 transitions. [2022-11-20 09:27:46,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:46,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 724 transitions. [2022-11-20 09:27:46,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 362.0) internal successors, (724), 2 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,908 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 400.0) internal successors, (1200), 3 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,908 INFO L175 Difference]: Start difference. First operand has 357 places, 400 transitions, 940 flow. Second operand 2 states and 724 transitions. [2022-11-20 09:27:46,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 830 flow [2022-11-20 09:27:46,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 335 transitions, 740 flow, removed 45 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:46,915 INFO L231 Difference]: Finished difference. Result has 357 places, 324 transitions, 698 flow [2022-11-20 09:27:46,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=698, PETRI_PLACES=357, PETRI_TRANSITIONS=324} [2022-11-20 09:27:46,916 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 0 predicate places. [2022-11-20 09:27:46,917 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 324 transitions, 698 flow [2022-11-20 09:27:46,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 325.5) internal successors, (651), 2 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:46,917 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] [2022-11-20 09:27:46,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-20 09:27:46,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:46,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2109524958, now seen corresponding path program 1 times [2022-11-20 09:27:46,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:46,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40135813] [2022-11-20 09:27:46,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:46,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:46,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40135813] [2022-11-20 09:27:46,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40135813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:46,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:46,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659244729] [2022-11-20 09:27:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:46,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 400 [2022-11-20 09:27:46,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 324 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:46,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:46,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 400 [2022-11-20 09:27:46,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:47,198 INFO L130 PetriNetUnfolder]: 0/508 cut-off events. [2022-11-20 09:27:47,198 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-20 09:27:47,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 508 events. 0/508 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1570 event pairs, 0 based on Foata normal form. 0/498 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 09:27:47,200 INFO L137 encePairwiseOnDemand]: 397/400 looper letters, 19 selfloop transitions, 2 changer transitions 0/328 dead transitions. [2022-11-20 09:27:47,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 328 transitions, 748 flow [2022-11-20 09:27:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:47,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 976 transitions. [2022-11-20 09:27:47,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2022-11-20 09:27:47,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 976 transitions. [2022-11-20 09:27:47,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 976 transitions. [2022-11-20 09:27:47,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:47,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 976 transitions. [2022-11-20 09:27:47,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.3333333333333) internal successors, (976), 3 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 400.0) internal successors, (1600), 4 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,210 INFO L175 Difference]: Start difference. First operand has 357 places, 324 transitions, 698 flow. Second operand 3 states and 976 transitions. [2022-11-20 09:27:47,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 328 transitions, 748 flow [2022-11-20 09:27:47,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 328 transitions, 748 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:47,219 INFO L231 Difference]: Finished difference. Result has 349 places, 325 transitions, 710 flow [2022-11-20 09:27:47,220 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=710, PETRI_PLACES=349, PETRI_TRANSITIONS=325} [2022-11-20 09:27:47,220 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, -8 predicate places. [2022-11-20 09:27:47,220 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 325 transitions, 710 flow [2022-11-20 09:27:47,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:47,221 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] [2022-11-20 09:27:47,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-20 09:27:47,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:47,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1154115786, now seen corresponding path program 1 times [2022-11-20 09:27:47,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:47,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147898728] [2022-11-20 09:27:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:47,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:47,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147898728] [2022-11-20 09:27:47,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147898728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:47,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143357501] [2022-11-20 09:27:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:47,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:47,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:47,294 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:47,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 09:27:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:47,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:47,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:47,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143357501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:47,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:47,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938851560] [2022-11-20 09:27:47,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:47,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-20 09:27:47,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 325 transitions, 710 flow. Second operand has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:47,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-20 09:27:47,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:47,893 INFO L130 PetriNetUnfolder]: 0/486 cut-off events. [2022-11-20 09:27:47,893 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 09:27:47,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 486 events. 0/486 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1432 event pairs, 0 based on Foata normal form. 2/488 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 09:27:47,896 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 20 selfloop transitions, 9 changer transitions 0/335 dead transitions. [2022-11-20 09:27:47,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 335 transitions, 790 flow [2022-11-20 09:27:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2884 transitions. [2022-11-20 09:27:47,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8011111111111111 [2022-11-20 09:27:47,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2884 transitions. [2022-11-20 09:27:47,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2884 transitions. [2022-11-20 09:27:47,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:47,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2884 transitions. [2022-11-20 09:27:47,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 320.44444444444446) internal successors, (2884), 9 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,911 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 400.0) internal successors, (4000), 10 states have internal predecessors, (4000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,911 INFO L175 Difference]: Start difference. First operand has 349 places, 325 transitions, 710 flow. Second operand 9 states and 2884 transitions. [2022-11-20 09:27:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 335 transitions, 790 flow [2022-11-20 09:27:47,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 335 transitions, 788 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:47,918 INFO L231 Difference]: Finished difference. Result has 359 places, 331 transitions, 758 flow [2022-11-20 09:27:47,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=758, PETRI_PLACES=359, PETRI_TRANSITIONS=331} [2022-11-20 09:27:47,919 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 2 predicate places. [2022-11-20 09:27:47,920 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 331 transitions, 758 flow [2022-11-20 09:27:47,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 319.3) internal successors, (3193), 10 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:47,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:47,921 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:47,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:48,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:48,127 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:48,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1243680545, now seen corresponding path program 1 times [2022-11-20 09:27:48,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847498547] [2022-11-20 09:27:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:48,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:48,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847498547] [2022-11-20 09:27:48,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847498547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:48,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258930208] [2022-11-20 09:27:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:48,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:48,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:48,249 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:48,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 09:27:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:48,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:48,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258930208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:48,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:48,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:48,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812164148] [2022-11-20 09:27:48,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:48,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:48,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:48,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-20 09:27:48,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 331 transitions, 758 flow. Second operand has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:48,656 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:48,656 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-20 09:27:48,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:49,045 INFO L130 PetriNetUnfolder]: 0/442 cut-off events. [2022-11-20 09:27:49,045 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-20 09:27:49,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 442 events. 0/442 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1144 event pairs, 0 based on Foata normal form. 4/446 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 09:27:49,046 INFO L137 encePairwiseOnDemand]: 394/400 looper letters, 28 selfloop transitions, 21 changer transitions 0/355 dead transitions. [2022-11-20 09:27:49,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 355 transitions, 964 flow [2022-11-20 09:27:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6710 transitions. [2022-11-20 09:27:49,054 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7988095238095239 [2022-11-20 09:27:49,054 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6710 transitions. [2022-11-20 09:27:49,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6710 transitions. [2022-11-20 09:27:49,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:49,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6710 transitions. [2022-11-20 09:27:49,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 319.5238095238095) internal successors, (6710), 21 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:49,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:49,076 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 400.0) internal successors, (8800), 22 states have internal predecessors, (8800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:49,076 INFO L175 Difference]: Start difference. First operand has 359 places, 331 transitions, 758 flow. Second operand 21 states and 6710 transitions. [2022-11-20 09:27:49,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 355 transitions, 964 flow [2022-11-20 09:27:49,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 355 transitions, 950 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:49,084 INFO L231 Difference]: Finished difference. Result has 383 places, 344 transitions, 882 flow [2022-11-20 09:27:49,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=882, PETRI_PLACES=383, PETRI_TRANSITIONS=344} [2022-11-20 09:27:49,085 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 26 predicate places. [2022-11-20 09:27:49,085 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 344 transitions, 882 flow [2022-11-20 09:27:49,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 319.6111111111111) internal successors, (5753), 18 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:49,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:49,087 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:49,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-20 09:27:49,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:49,293 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:49,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1389100285, now seen corresponding path program 1 times [2022-11-20 09:27:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:49,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120226315] [2022-11-20 09:27:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:49,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:49,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120226315] [2022-11-20 09:27:49,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120226315] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:49,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184360053] [2022-11-20 09:27:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:49,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:49,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:49,617 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:49,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 09:27:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:49,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:49,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:49,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:50,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184360053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:50,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:50,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:27:50,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068147560] [2022-11-20 09:27:50,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:50,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:27:50,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:27:50,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:27:50,340 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 400 [2022-11-20 09:27:50,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 344 transitions, 882 flow. Second operand has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:50,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:50,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 400 [2022-11-20 09:27:50,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:50,989 INFO L130 PetriNetUnfolder]: 0/398 cut-off events. [2022-11-20 09:27:50,990 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-20 09:27:50,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626 conditions, 398 events. 0/398 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/402 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-20 09:27:50,991 INFO L137 encePairwiseOnDemand]: 395/400 looper letters, 33 selfloop transitions, 31 changer transitions 0/360 dead transitions. [2022-11-20 09:27:50,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 360 transitions, 1122 flow [2022-11-20 09:27:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 09:27:50,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-20 09:27:51,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10529 transitions. [2022-11-20 09:27:51,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7976515151515151 [2022-11-20 09:27:51,005 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10529 transitions. [2022-11-20 09:27:51,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10529 transitions. [2022-11-20 09:27:51,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:51,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10529 transitions. [2022-11-20 09:27:51,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 319.06060606060606) internal successors, (10529), 33 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,038 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 400.0) internal successors, (13600), 34 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,039 INFO L175 Difference]: Start difference. First operand has 383 places, 344 transitions, 882 flow. Second operand 33 states and 10529 transitions. [2022-11-20 09:27:51,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 360 transitions, 1122 flow [2022-11-20 09:27:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 360 transitions, 1056 flow, removed 9 selfloop flow, removed 13 redundant places. [2022-11-20 09:27:51,047 INFO L231 Difference]: Finished difference. Result has 391 places, 342 transitions, 917 flow [2022-11-20 09:27:51,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=400, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=917, PETRI_PLACES=391, PETRI_TRANSITIONS=342} [2022-11-20 09:27:51,048 INFO L288 CegarLoopForPetriNet]: 357 programPoint places, 34 predicate places. [2022-11-20 09:27:51,049 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 342 transitions, 917 flow [2022-11-20 09:27:51,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 319.79411764705884) internal successors, (10873), 34 states have internal predecessors, (10873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,050 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:51,051 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:51,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:51,257 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2124296463, now seen corresponding path program 1 times [2022-11-20 09:27:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:51,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607644079] [2022-11-20 09:27:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:51,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:51,287 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:51,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:51,323 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:51,323 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:51,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:51,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-20 09:27:51,324 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:27:51,324 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:51,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2022-11-20 09:27:51,361 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:51,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 386 places, 433 transitions, 1031 flow [2022-11-20 09:27:51,533 INFO L130 PetriNetUnfolder]: 114/824 cut-off events. [2022-11-20 09:27:51,533 INFO L131 PetriNetUnfolder]: For 275/275 co-relation queries the response was YES. [2022-11-20 09:27:51,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 824 events. 114/824 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 2855 event pairs, 0 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 819. Up to 24 conditions per place. [2022-11-20 09:27:51,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 386 places, 433 transitions, 1031 flow [2022-11-20 09:27:51,564 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 386 places, 433 transitions, 1031 flow [2022-11-20 09:27:51,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:51,566 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:51,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:51,572 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:51,572 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:51,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:51,573 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] [2022-11-20 09:27:51,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:51,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1953435615, now seen corresponding path program 1 times [2022-11-20 09:27:51,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:51,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249019127] [2022-11-20 09:27:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:51,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:51,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249019127] [2022-11-20 09:27:51,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249019127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:51,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:51,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86902486] [2022-11-20 09:27:51,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:51,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:51,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:51,592 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 433 [2022-11-20 09:27:51,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 433 transitions, 1031 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:51,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 433 [2022-11-20 09:27:51,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:51,879 INFO L130 PetriNetUnfolder]: 0/698 cut-off events. [2022-11-20 09:27:51,879 INFO L131 PetriNetUnfolder]: For 341/341 co-relation queries the response was YES. [2022-11-20 09:27:51,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 698 events. 0/698 cut-off events. For 341/341 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2629 event pairs, 0 based on Foata normal form. 386/1060 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2022-11-20 09:27:51,881 INFO L137 encePairwiseOnDemand]: 363/433 looper letters, 11 selfloop transitions, 0 changer transitions 11/362 dead transitions. [2022-11-20 09:27:51,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 911 flow [2022-11-20 09:27:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 783 transitions. [2022-11-20 09:27:51,883 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9041570438799076 [2022-11-20 09:27:51,883 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 783 transitions. [2022-11-20 09:27:51,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 783 transitions. [2022-11-20 09:27:51,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:51,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 783 transitions. [2022-11-20 09:27:51,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 391.5) internal successors, (783), 2 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,887 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,887 INFO L175 Difference]: Start difference. First operand has 386 places, 433 transitions, 1031 flow. Second operand 2 states and 783 transitions. [2022-11-20 09:27:51,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 911 flow [2022-11-20 09:27:51,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 362 transitions, 801 flow, removed 55 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:51,898 INFO L231 Difference]: Finished difference. Result has 386 places, 351 transitions, 757 flow [2022-11-20 09:27:51,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=757, PETRI_PLACES=386, PETRI_TRANSITIONS=351} [2022-11-20 09:27:51,899 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 0 predicate places. [2022-11-20 09:27:51,900 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 351 transitions, 757 flow [2022-11-20 09:27:51,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,900 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:51,900 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] [2022-11-20 09:27:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-20 09:27:51,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 544580322, now seen corresponding path program 1 times [2022-11-20 09:27:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:51,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207312920] [2022-11-20 09:27:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:51,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207312920] [2022-11-20 09:27:51,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207312920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:51,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:51,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733423257] [2022-11-20 09:27:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:51,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:51,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 433 [2022-11-20 09:27:51,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 351 transitions, 757 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:51,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:51,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 433 [2022-11-20 09:27:51,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:52,135 INFO L130 PetriNetUnfolder]: 0/555 cut-off events. [2022-11-20 09:27:52,135 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-20 09:27:52,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 555 events. 0/555 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1738 event pairs, 0 based on Foata normal form. 0/544 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 09:27:52,136 INFO L137 encePairwiseOnDemand]: 430/433 looper letters, 20 selfloop transitions, 2 changer transitions 0/355 dead transitions. [2022-11-20 09:27:52,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 355 transitions, 809 flow [2022-11-20 09:27:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:52,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1055 transitions. [2022-11-20 09:27:52,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8121632024634334 [2022-11-20 09:27:52,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1055 transitions. [2022-11-20 09:27:52,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1055 transitions. [2022-11-20 09:27:52,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:52,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1055 transitions. [2022-11-20 09:27:52,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.6666666666667) internal successors, (1055), 3 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,142 INFO L175 Difference]: Start difference. First operand has 386 places, 351 transitions, 757 flow. Second operand 3 states and 1055 transitions. [2022-11-20 09:27:52,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 355 transitions, 809 flow [2022-11-20 09:27:52,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 355 transitions, 809 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:52,150 INFO L231 Difference]: Finished difference. Result has 378 places, 352 transitions, 769 flow [2022-11-20 09:27:52,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=769, PETRI_PLACES=378, PETRI_TRANSITIONS=352} [2022-11-20 09:27:52,151 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, -8 predicate places. [2022-11-20 09:27:52,151 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 352 transitions, 769 flow [2022-11-20 09:27:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:52,152 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] [2022-11-20 09:27:52,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-20 09:27:52,152 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash -382004042, now seen corresponding path program 1 times [2022-11-20 09:27:52,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:52,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597508532] [2022-11-20 09:27:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:52,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:52,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597508532] [2022-11-20 09:27:52,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597508532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:52,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710063363] [2022-11-20 09:27:52,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:52,206 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:52,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 09:27:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:52,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:52,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710063363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:52,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:52,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370497358] [2022-11-20 09:27:52,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:52,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:52,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:52,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:52,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:52,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-20 09:27:52,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 352 transitions, 769 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:52,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-20 09:27:52,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:52,771 INFO L130 PetriNetUnfolder]: 0/533 cut-off events. [2022-11-20 09:27:52,771 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 09:27:52,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 533 events. 0/533 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1602 event pairs, 0 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 09:27:52,773 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 21 selfloop transitions, 9 changer transitions 0/362 dead transitions. [2022-11-20 09:27:52,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 362 transitions, 851 flow [2022-11-20 09:27:52,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3119 transitions. [2022-11-20 09:27:52,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.800359250705671 [2022-11-20 09:27:52,778 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3119 transitions. [2022-11-20 09:27:52,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3119 transitions. [2022-11-20 09:27:52,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:52,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3119 transitions. [2022-11-20 09:27:52,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.55555555555554) internal successors, (3119), 9 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,788 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 433.0) internal successors, (4330), 10 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,788 INFO L175 Difference]: Start difference. First operand has 378 places, 352 transitions, 769 flow. Second operand 9 states and 3119 transitions. [2022-11-20 09:27:52,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 362 transitions, 851 flow [2022-11-20 09:27:52,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 362 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:52,795 INFO L231 Difference]: Finished difference. Result has 388 places, 358 transitions, 817 flow [2022-11-20 09:27:52,796 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=817, PETRI_PLACES=388, PETRI_TRANSITIONS=358} [2022-11-20 09:27:52,797 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 2 predicate places. [2022-11-20 09:27:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 358 transitions, 817 flow [2022-11-20 09:27:52,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:52,798 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:52,798 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:52,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:53,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:53,005 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash 33446433, now seen corresponding path program 1 times [2022-11-20 09:27:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:53,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232020411] [2022-11-20 09:27:53,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232020411] [2022-11-20 09:27:53,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232020411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:53,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232351501] [2022-11-20 09:27:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:53,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:53,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:53,167 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 09:27:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:53,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:53,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:53,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:53,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232351501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:53,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:53,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:53,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384598100] [2022-11-20 09:27:53,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:53,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:53,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:53,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:53,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-20 09:27:53,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 358 transitions, 817 flow. Second operand has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:53,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:53,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-20 09:27:53,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:54,048 INFO L130 PetriNetUnfolder]: 0/489 cut-off events. [2022-11-20 09:27:54,048 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-20 09:27:54,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 489 events. 0/489 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1314 event pairs, 0 based on Foata normal form. 4/493 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 09:27:54,050 INFO L137 encePairwiseOnDemand]: 427/433 looper letters, 29 selfloop transitions, 21 changer transitions 0/382 dead transitions. [2022-11-20 09:27:54,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 382 transitions, 1025 flow [2022-11-20 09:27:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7257 transitions. [2022-11-20 09:27:54,059 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7980864401187727 [2022-11-20 09:27:54,059 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7257 transitions. [2022-11-20 09:27:54,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7257 transitions. [2022-11-20 09:27:54,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:54,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7257 transitions. [2022-11-20 09:27:54,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 345.57142857142856) internal successors, (7257), 21 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,083 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 433.0) internal successors, (9526), 22 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,084 INFO L175 Difference]: Start difference. First operand has 388 places, 358 transitions, 817 flow. Second operand 21 states and 7257 transitions. [2022-11-20 09:27:54,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 382 transitions, 1025 flow [2022-11-20 09:27:54,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 382 transitions, 1011 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:54,092 INFO L231 Difference]: Finished difference. Result has 412 places, 371 transitions, 941 flow [2022-11-20 09:27:54,093 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=941, PETRI_PLACES=412, PETRI_TRANSITIONS=371} [2022-11-20 09:27:54,094 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 26 predicate places. [2022-11-20 09:27:54,094 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 371 transitions, 941 flow [2022-11-20 09:27:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 345.6111111111111) internal successors, (6221), 18 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:54,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:54,096 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:54,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-20 09:27:54,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1613256445, now seen corresponding path program 1 times [2022-11-20 09:27:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:54,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195520388] [2022-11-20 09:27:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:54,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195520388] [2022-11-20 09:27:54,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195520388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:54,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741440990] [2022-11-20 09:27:54,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:54,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:54,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:54,594 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:54,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:27:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:55,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741440990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:55,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:55,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:27:55,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401252344] [2022-11-20 09:27:55,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:55,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:27:55,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:27:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:27:55,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 433 [2022-11-20 09:27:55,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 371 transitions, 941 flow. Second operand has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:55,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:55,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 433 [2022-11-20 09:27:55,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:56,013 INFO L130 PetriNetUnfolder]: 0/434 cut-off events. [2022-11-20 09:27:56,013 INFO L131 PetriNetUnfolder]: For 168/168 co-relation queries the response was YES. [2022-11-20 09:27:56,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 434 events. 0/434 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/439 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 09:27:56,014 INFO L137 encePairwiseOnDemand]: 428/433 looper letters, 36 selfloop transitions, 34 changer transitions 0/392 dead transitions. [2022-11-20 09:27:56,015 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 392 transitions, 1227 flow [2022-11-20 09:27:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:27:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-20 09:27:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12423 transitions. [2022-11-20 09:27:56,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969591993841416 [2022-11-20 09:27:56,026 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12423 transitions. [2022-11-20 09:27:56,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12423 transitions. [2022-11-20 09:27:56,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:56,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12423 transitions. [2022-11-20 09:27:56,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 345.0833333333333) internal successors, (12423), 36 states have internal predecessors, (12423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,059 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 433.0) internal successors, (16021), 37 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,060 INFO L175 Difference]: Start difference. First operand has 412 places, 371 transitions, 941 flow. Second operand 36 states and 12423 transitions. [2022-11-20 09:27:56,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 392 transitions, 1227 flow [2022-11-20 09:27:56,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 392 transitions, 1155 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-20 09:27:56,068 INFO L231 Difference]: Finished difference. Result has 423 places, 372 transitions, 1000 flow [2022-11-20 09:27:56,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=433, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1000, PETRI_PLACES=423, PETRI_TRANSITIONS=372} [2022-11-20 09:27:56,069 INFO L288 CegarLoopForPetriNet]: 386 programPoint places, 37 predicate places. [2022-11-20 09:27:56,069 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 372 transitions, 1000 flow [2022-11-20 09:27:56,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 345.79411764705884) internal successors, (11757), 34 states have internal predecessors, (11757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,071 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:56,071 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:56,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:56,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:56,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1736277805, now seen corresponding path program 1 times [2022-11-20 09:27:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028309270] [2022-11-20 09:27:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:56,303 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:27:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:27:56,339 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:27:56,339 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:27:56,339 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:27:56,339 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:27:56,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-11-20 09:27:56,340 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:27:56,340 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:27:56,340 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2022-11-20 09:27:56,380 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:27:56,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 415 places, 466 transitions, 1124 flow [2022-11-20 09:27:56,590 INFO L130 PetriNetUnfolder]: 124/893 cut-off events. [2022-11-20 09:27:56,590 INFO L131 PetriNetUnfolder]: For 352/352 co-relation queries the response was YES. [2022-11-20 09:27:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 893 events. 124/893 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3170 event pairs, 0 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 900. Up to 26 conditions per place. [2022-11-20 09:27:56,610 INFO L82 GeneralOperation]: Start removeDead. Operand has 415 places, 466 transitions, 1124 flow [2022-11-20 09:27:56,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 415 places, 466 transitions, 1124 flow [2022-11-20 09:27:56,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:56,621 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:56,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:27:56,624 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:27:56,625 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:27:56,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:56,625 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] [2022-11-20 09:27:56,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:56,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:56,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1170144863, now seen corresponding path program 1 times [2022-11-20 09:27:56,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:56,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437809137] [2022-11-20 09:27:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:56,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:56,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:56,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437809137] [2022-11-20 09:27:56,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437809137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:56,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:56,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:56,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116306865] [2022-11-20 09:27:56,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:56,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:56,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:56,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:56,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 377 out of 466 [2022-11-20 09:27:56,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 1124 flow. Second operand has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:56,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:56,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 377 of 466 [2022-11-20 09:27:56,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:56,998 INFO L130 PetriNetUnfolder]: 0/756 cut-off events. [2022-11-20 09:27:56,999 INFO L131 PetriNetUnfolder]: For 430/430 co-relation queries the response was YES. [2022-11-20 09:27:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 756 events. 0/756 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2876 event pairs, 0 based on Foata normal form. 456/1186 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2022-11-20 09:27:57,001 INFO L137 encePairwiseOnDemand]: 390/466 looper letters, 12 selfloop transitions, 0 changer transitions 11/389 dead transitions. [2022-11-20 09:27:57,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 994 flow [2022-11-20 09:27:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:27:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 842 transitions. [2022-11-20 09:27:57,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9034334763948498 [2022-11-20 09:27:57,004 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 842 transitions. [2022-11-20 09:27:57,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 842 transitions. [2022-11-20 09:27:57,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:57,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 842 transitions. [2022-11-20 09:27:57,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 421.0) internal successors, (842), 2 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,007 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 466.0) internal successors, (1398), 3 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,007 INFO L175 Difference]: Start difference. First operand has 415 places, 466 transitions, 1124 flow. Second operand 2 states and 842 transitions. [2022-11-20 09:27:57,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 994 flow [2022-11-20 09:27:57,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 389 transitions, 862 flow, removed 66 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:57,022 INFO L231 Difference]: Finished difference. Result has 415 places, 378 transitions, 816 flow [2022-11-20 09:27:57,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=816, PETRI_PLACES=415, PETRI_TRANSITIONS=378} [2022-11-20 09:27:57,024 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 0 predicate places. [2022-11-20 09:27:57,024 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 378 transitions, 816 flow [2022-11-20 09:27:57,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 377.5) internal successors, (755), 2 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:57,025 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] [2022-11-20 09:27:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-11-20 09:27:57,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1327871074, now seen corresponding path program 1 times [2022-11-20 09:27:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:57,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267384945] [2022-11-20 09:27:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:57,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267384945] [2022-11-20 09:27:57,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267384945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:57,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:57,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:57,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816378455] [2022-11-20 09:27:57,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:57,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:27:57,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:57,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:27:57,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:27:57,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 370 out of 466 [2022-11-20 09:27:57,062 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 378 transitions, 816 flow. Second operand has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:57,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 370 of 466 [2022-11-20 09:27:57,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:57,266 INFO L130 PetriNetUnfolder]: 0/602 cut-off events. [2022-11-20 09:27:57,266 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-20 09:27:57,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 602 events. 0/602 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1909 event pairs, 0 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 09:27:57,268 INFO L137 encePairwiseOnDemand]: 463/466 looper letters, 21 selfloop transitions, 2 changer transitions 0/382 dead transitions. [2022-11-20 09:27:57,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 382 transitions, 870 flow [2022-11-20 09:27:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:27:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:27:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1134 transitions. [2022-11-20 09:27:57,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8111587982832618 [2022-11-20 09:27:57,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1134 transitions. [2022-11-20 09:27:57,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1134 transitions. [2022-11-20 09:27:57,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:57,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1134 transitions. [2022-11-20 09:27:57,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.0) internal successors, (1134), 3 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 466.0) internal successors, (1864), 4 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,274 INFO L175 Difference]: Start difference. First operand has 415 places, 378 transitions, 816 flow. Second operand 3 states and 1134 transitions. [2022-11-20 09:27:57,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 382 transitions, 870 flow [2022-11-20 09:27:57,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 382 transitions, 870 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:27:57,282 INFO L231 Difference]: Finished difference. Result has 407 places, 379 transitions, 828 flow [2022-11-20 09:27:57,282 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=828, PETRI_PLACES=407, PETRI_TRANSITIONS=379} [2022-11-20 09:27:57,283 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, -8 predicate places. [2022-11-20 09:27:57,283 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 379 transitions, 828 flow [2022-11-20 09:27:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 371.0) internal successors, (1113), 3 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:57,284 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] [2022-11-20 09:27:57,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-11-20 09:27:57,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:57,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:57,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1582336406, now seen corresponding path program 1 times [2022-11-20 09:27:57,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:57,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958423596] [2022-11-20 09:27:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:57,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958423596] [2022-11-20 09:27:57,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958423596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:57,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021575626] [2022-11-20 09:27:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:57,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:57,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:57,332 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:57,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 09:27:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:57,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:27:57,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:57,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021575626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:57,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:57,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:27:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880053963] [2022-11-20 09:27:57,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:57,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:57,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-20 09:27:57,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 379 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:57,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-20 09:27:57,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:57,927 INFO L130 PetriNetUnfolder]: 0/580 cut-off events. [2022-11-20 09:27:57,927 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 09:27:57,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 743 conditions, 580 events. 0/580 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1782 event pairs, 0 based on Foata normal form. 2/582 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 09:27:57,929 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 22 selfloop transitions, 9 changer transitions 0/389 dead transitions. [2022-11-20 09:27:57,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 389 transitions, 912 flow [2022-11-20 09:27:57,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:27:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:27:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3354 transitions. [2022-11-20 09:27:57,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7997138769670958 [2022-11-20 09:27:57,933 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3354 transitions. [2022-11-20 09:27:57,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3354 transitions. [2022-11-20 09:27:57,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:57,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3354 transitions. [2022-11-20 09:27:57,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 372.6666666666667) internal successors, (3354), 9 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,943 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 466.0) internal successors, (4660), 10 states have internal predecessors, (4660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,943 INFO L175 Difference]: Start difference. First operand has 407 places, 379 transitions, 828 flow. Second operand 9 states and 3354 transitions. [2022-11-20 09:27:57,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 389 transitions, 912 flow [2022-11-20 09:27:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 389 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:57,951 INFO L231 Difference]: Finished difference. Result has 417 places, 385 transitions, 876 flow [2022-11-20 09:27:57,952 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=876, PETRI_PLACES=417, PETRI_TRANSITIONS=385} [2022-11-20 09:27:57,952 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 2 predicate places. [2022-11-20 09:27:57,952 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 385 transitions, 876 flow [2022-11-20 09:27:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 371.3) internal successors, (3713), 10 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:57,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:57,954 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:57,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-20 09:27:58,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 206466497, now seen corresponding path program 1 times [2022-11-20 09:27:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989945552] [2022-11-20 09:27:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:58,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:58,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:58,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989945552] [2022-11-20 09:27:58,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989945552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:58,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601524172] [2022-11-20 09:27:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:58,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:58,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:58,291 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:58,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 09:27:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:27:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:58,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:58,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601524172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:58,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:27:58,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:27:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305222475] [2022-11-20 09:27:58,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:27:58,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:27:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:58,720 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-20 09:27:58,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 385 transitions, 876 flow. Second operand has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:58,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:27:58,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-20 09:27:58,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:27:59,104 INFO L130 PetriNetUnfolder]: 0/536 cut-off events. [2022-11-20 09:27:59,105 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-20 09:27:59,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 536 events. 0/536 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1490 event pairs, 0 based on Foata normal form. 4/540 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 09:27:59,106 INFO L137 encePairwiseOnDemand]: 460/466 looper letters, 30 selfloop transitions, 21 changer transitions 0/409 dead transitions. [2022-11-20 09:27:59,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 409 transitions, 1086 flow [2022-11-20 09:27:59,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:27:59,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:27:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7804 transitions. [2022-11-20 09:27:59,115 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974657674228489 [2022-11-20 09:27:59,115 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7804 transitions. [2022-11-20 09:27:59,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7804 transitions. [2022-11-20 09:27:59,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:27:59,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7804 transitions. [2022-11-20 09:27:59,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 371.6190476190476) internal successors, (7804), 21 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:59,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:59,136 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 466.0) internal successors, (10252), 22 states have internal predecessors, (10252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:59,136 INFO L175 Difference]: Start difference. First operand has 417 places, 385 transitions, 876 flow. Second operand 21 states and 7804 transitions. [2022-11-20 09:27:59,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 409 transitions, 1086 flow [2022-11-20 09:27:59,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 409 transitions, 1072 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:27:59,146 INFO L231 Difference]: Finished difference. Result has 441 places, 398 transitions, 1000 flow [2022-11-20 09:27:59,147 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1000, PETRI_PLACES=441, PETRI_TRANSITIONS=398} [2022-11-20 09:27:59,147 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 26 predicate places. [2022-11-20 09:27:59,147 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 398 transitions, 1000 flow [2022-11-20 09:27:59,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 371.6111111111111) internal successors, (6689), 18 states have internal predecessors, (6689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:27:59,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:27:59,149 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:59,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:59,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 09:27:59,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:27:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -561751517, now seen corresponding path program 1 times [2022-11-20 09:27:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:59,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728398944] [2022-11-20 09:27:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:59,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728398944] [2022-11-20 09:27:59,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728398944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696515439] [2022-11-20 09:27:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:59,626 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:59,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 09:27:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:59,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:27:59,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:27:59,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:00,343 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:00,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696515439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:00,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:00,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:00,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355653920] [2022-11-20 09:28:00,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:00,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:00,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:00,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 369 out of 466 [2022-11-20 09:28:00,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 398 transitions, 1000 flow. Second operand has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:00,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:00,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 369 of 466 [2022-11-20 09:28:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:01,119 INFO L130 PetriNetUnfolder]: 0/470 cut-off events. [2022-11-20 09:28:01,119 INFO L131 PetriNetUnfolder]: For 195/195 co-relation queries the response was YES. [2022-11-20 09:28:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 470 events. 0/470 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1071 event pairs, 0 based on Foata normal form. 6/476 useless extension candidates. Maximal degree in co-relation 0. Up to 21 conditions per place. [2022-11-20 09:28:01,120 INFO L137 encePairwiseOnDemand]: 461/466 looper letters, 39 selfloop transitions, 37 changer transitions 0/424 dead transitions. [2022-11-20 09:28:01,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 424 transitions, 1332 flow [2022-11-20 09:28:01,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 09:28:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 09:28:01,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 14473 transitions. [2022-11-20 09:28:01,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7963574336964895 [2022-11-20 09:28:01,139 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 14473 transitions. [2022-11-20 09:28:01,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 14473 transitions. [2022-11-20 09:28:01,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:01,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 14473 transitions. [2022-11-20 09:28:01,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 371.1025641025641) internal successors, (14473), 39 states have internal predecessors, (14473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,180 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 466.0) internal successors, (18640), 40 states have internal predecessors, (18640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,181 INFO L175 Difference]: Start difference. First operand has 441 places, 398 transitions, 1000 flow. Second operand 39 states and 14473 transitions. [2022-11-20 09:28:01,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 424 transitions, 1332 flow [2022-11-20 09:28:01,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 424 transitions, 1254 flow, removed 11 selfloop flow, removed 13 redundant places. [2022-11-20 09:28:01,190 INFO L231 Difference]: Finished difference. Result has 455 places, 402 transitions, 1083 flow [2022-11-20 09:28:01,191 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=466, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1083, PETRI_PLACES=455, PETRI_TRANSITIONS=402} [2022-11-20 09:28:01,192 INFO L288 CegarLoopForPetriNet]: 415 programPoint places, 40 predicate places. [2022-11-20 09:28:01,192 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 402 transitions, 1083 flow [2022-11-20 09:28:01,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 371.79411764705884) internal successors, (12641), 34 states have internal predecessors, (12641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:01,194 INFO L209 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:01,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:01,400 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:01,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:01,400 INFO L85 PathProgramCache]: Analyzing trace with hash -981893652, now seen corresponding path program 1 times [2022-11-20 09:28:01,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:01,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925567914] [2022-11-20 09:28:01,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:01,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:01,436 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:01,482 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:01,483 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:01,483 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:01,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-11-20 09:28:01,483 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:01,484 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:01,484 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2022-11-20 09:28:01,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:01,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 444 places, 499 transitions, 1219 flow [2022-11-20 09:28:01,795 INFO L130 PetriNetUnfolder]: 134/962 cut-off events. [2022-11-20 09:28:01,795 INFO L131 PetriNetUnfolder]: For 442/442 co-relation queries the response was YES. [2022-11-20 09:28:01,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 962 events. 134/962 cut-off events. For 442/442 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3413 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 982. Up to 28 conditions per place. [2022-11-20 09:28:01,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 444 places, 499 transitions, 1219 flow [2022-11-20 09:28:01,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 444 places, 499 transitions, 1219 flow [2022-11-20 09:28:01,831 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:01,832 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:01,832 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:01,837 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:01,838 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:01,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:01,838 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] [2022-11-20 09:28:01,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:01,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2037298657, now seen corresponding path program 1 times [2022-11-20 09:28:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:01,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456900601] [2022-11-20 09:28:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456900601] [2022-11-20 09:28:01,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456900601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:01,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:01,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356958096] [2022-11-20 09:28:01,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:01,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 403 out of 499 [2022-11-20 09:28:01,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 499 transitions, 1219 flow. Second operand has 2 states, 2 states have (on average 403.5) internal successors, (807), 2 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:01,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:01,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 403 of 499 [2022-11-20 09:28:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:02,134 INFO L130 PetriNetUnfolder]: 0/814 cut-off events. [2022-11-20 09:28:02,134 INFO L131 PetriNetUnfolder]: For 533/533 co-relation queries the response was YES. [2022-11-20 09:28:02,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 814 events. 0/814 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3123 event pairs, 0 based on Foata normal form. 532/1318 useless extension candidates. Maximal degree in co-relation 0. Up to 14 conditions per place. [2022-11-20 09:28:02,136 INFO L137 encePairwiseOnDemand]: 417/499 looper letters, 13 selfloop transitions, 0 changer transitions 11/416 dead transitions. [2022-11-20 09:28:02,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 416 transitions, 1079 flow [2022-11-20 09:28:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 901 transitions. [2022-11-20 09:28:02,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9028056112224448 [2022-11-20 09:28:02,138 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 901 transitions. [2022-11-20 09:28:02,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 901 transitions. [2022-11-20 09:28:02,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:02,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 901 transitions. [2022-11-20 09:28:02,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 450.5) internal successors, (901), 2 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,140 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 499.0) internal successors, (1497), 3 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,141 INFO L175 Difference]: Start difference. First operand has 444 places, 499 transitions, 1219 flow. Second operand 2 states and 901 transitions. [2022-11-20 09:28:02,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 416 transitions, 1079 flow [2022-11-20 09:28:02,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 416 transitions, 923 flow, removed 78 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:02,149 INFO L231 Difference]: Finished difference. Result has 444 places, 405 transitions, 875 flow [2022-11-20 09:28:02,150 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=897, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=875, PETRI_PLACES=444, PETRI_TRANSITIONS=405} [2022-11-20 09:28:02,150 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 0 predicate places. [2022-11-20 09:28:02,150 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 405 transitions, 875 flow [2022-11-20 09:28:02,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 403.5) internal successors, (807), 2 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,151 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:02,151 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] [2022-11-20 09:28:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-11-20 09:28:02,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash 240347298, now seen corresponding path program 1 times [2022-11-20 09:28:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384157628] [2022-11-20 09:28:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:02,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384157628] [2022-11-20 09:28:02,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384157628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:02,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:02,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:02,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146270118] [2022-11-20 09:28:02,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:02,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:02,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:02,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:02,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 396 out of 499 [2022-11-20 09:28:02,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 405 transitions, 875 flow. Second operand has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:02,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 396 of 499 [2022-11-20 09:28:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:02,413 INFO L130 PetriNetUnfolder]: 0/649 cut-off events. [2022-11-20 09:28:02,413 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-20 09:28:02,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 649 events. 0/649 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2083 event pairs, 0 based on Foata normal form. 0/636 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 09:28:02,415 INFO L137 encePairwiseOnDemand]: 496/499 looper letters, 22 selfloop transitions, 2 changer transitions 0/409 dead transitions. [2022-11-20 09:28:02,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 409 transitions, 931 flow [2022-11-20 09:28:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1213 transitions. [2022-11-20 09:28:02,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8102872411489646 [2022-11-20 09:28:02,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1213 transitions. [2022-11-20 09:28:02,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1213 transitions. [2022-11-20 09:28:02,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:02,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1213 transitions. [2022-11-20 09:28:02,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.3333333333333) internal successors, (1213), 3 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,419 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 499.0) internal successors, (1996), 4 states have internal predecessors, (1996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,419 INFO L175 Difference]: Start difference. First operand has 444 places, 405 transitions, 875 flow. Second operand 3 states and 1213 transitions. [2022-11-20 09:28:02,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 409 transitions, 931 flow [2022-11-20 09:28:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 409 transitions, 931 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:02,428 INFO L231 Difference]: Finished difference. Result has 436 places, 406 transitions, 887 flow [2022-11-20 09:28:02,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=887, PETRI_PLACES=436, PETRI_TRANSITIONS=406} [2022-11-20 09:28:02,429 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, -8 predicate places. [2022-11-20 09:28:02,429 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 406 transitions, 887 flow [2022-11-20 09:28:02,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 397.0) internal successors, (1191), 3 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:02,430 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] [2022-11-20 09:28:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-11-20 09:28:02,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:02,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 443938262, now seen corresponding path program 1 times [2022-11-20 09:28:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:02,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447175797] [2022-11-20 09:28:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447175797] [2022-11-20 09:28:02,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447175797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:02,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224566533] [2022-11-20 09:28:02,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:02,480 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:02,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 09:28:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:02,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:02,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224566533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:02,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:02,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:02,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141847207] [2022-11-20 09:28:02,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:02,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:02,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:02,819 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-20 09:28:02,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 406 transitions, 887 flow. Second operand has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:02,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:02,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-20 09:28:02,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:03,115 INFO L130 PetriNetUnfolder]: 0/627 cut-off events. [2022-11-20 09:28:03,116 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 09:28:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 627 events. 0/627 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1953 event pairs, 0 based on Foata normal form. 2/629 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-20 09:28:03,117 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 23 selfloop transitions, 9 changer transitions 0/416 dead transitions. [2022-11-20 09:28:03,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 416 transitions, 973 flow [2022-11-20 09:28:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3589 transitions. [2022-11-20 09:28:03,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7991538632821198 [2022-11-20 09:28:03,121 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3589 transitions. [2022-11-20 09:28:03,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3589 transitions. [2022-11-20 09:28:03,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:03,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3589 transitions. [2022-11-20 09:28:03,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 398.77777777777777) internal successors, (3589), 9 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:03,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:03,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 499.0) internal successors, (4990), 10 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:03,128 INFO L175 Difference]: Start difference. First operand has 436 places, 406 transitions, 887 flow. Second operand 9 states and 3589 transitions. [2022-11-20 09:28:03,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 416 transitions, 973 flow [2022-11-20 09:28:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 416 transitions, 971 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:03,137 INFO L231 Difference]: Finished difference. Result has 446 places, 412 transitions, 935 flow [2022-11-20 09:28:03,137 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=935, PETRI_PLACES=446, PETRI_TRANSITIONS=412} [2022-11-20 09:28:03,138 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 2 predicate places. [2022-11-20 09:28:03,138 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 412 transitions, 935 flow [2022-11-20 09:28:03,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 397.3) internal successors, (3973), 10 states have internal predecessors, (3973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:03,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:03,139 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:03,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:03,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-11-20 09:28:03,345 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1762740737, now seen corresponding path program 1 times [2022-11-20 09:28:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360150929] [2022-11-20 09:28:03,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:03,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360150929] [2022-11-20 09:28:03,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360150929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824199806] [2022-11-20 09:28:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:03,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:03,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:03,444 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:03,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 09:28:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:03,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:03,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:03,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824199806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:03,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:03,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203103233] [2022-11-20 09:28:03,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:03,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:03,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:03,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-20 09:28:03,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 412 transitions, 935 flow. Second operand has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:03,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:03,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-20 09:28:03,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:04,366 INFO L130 PetriNetUnfolder]: 0/583 cut-off events. [2022-11-20 09:28:04,366 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-20 09:28:04,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 583 events. 0/583 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1654 event pairs, 0 based on Foata normal form. 4/587 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 09:28:04,368 INFO L137 encePairwiseOnDemand]: 493/499 looper letters, 31 selfloop transitions, 21 changer transitions 0/436 dead transitions. [2022-11-20 09:28:04,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 436 transitions, 1147 flow [2022-11-20 09:28:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8351 transitions. [2022-11-20 09:28:04,375 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969271877087508 [2022-11-20 09:28:04,375 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8351 transitions. [2022-11-20 09:28:04,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8351 transitions. [2022-11-20 09:28:04,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:04,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8351 transitions. [2022-11-20 09:28:04,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 397.6666666666667) internal successors, (8351), 21 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:04,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:04,396 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 499.0) internal successors, (10978), 22 states have internal predecessors, (10978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:04,397 INFO L175 Difference]: Start difference. First operand has 446 places, 412 transitions, 935 flow. Second operand 21 states and 8351 transitions. [2022-11-20 09:28:04,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 436 transitions, 1147 flow [2022-11-20 09:28:04,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 436 transitions, 1133 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:04,405 INFO L231 Difference]: Finished difference. Result has 470 places, 425 transitions, 1059 flow [2022-11-20 09:28:04,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1059, PETRI_PLACES=470, PETRI_TRANSITIONS=425} [2022-11-20 09:28:04,406 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 26 predicate places. [2022-11-20 09:28:04,406 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 425 transitions, 1059 flow [2022-11-20 09:28:04,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 397.6111111111111) internal successors, (7157), 18 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:04,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:04,408 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:04,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:04,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:04,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1765414499, now seen corresponding path program 1 times [2022-11-20 09:28:04,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:04,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054274586] [2022-11-20 09:28:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:04,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054274586] [2022-11-20 09:28:04,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054274586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637755698] [2022-11-20 09:28:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:04,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:04,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:04,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:04,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 09:28:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:05,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:05,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637755698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:05,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:05,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:05,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920784624] [2022-11-20 09:28:05,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:05,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:05,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:05,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 499 [2022-11-20 09:28:05,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 425 transitions, 1059 flow. Second operand has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:05,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:05,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 499 [2022-11-20 09:28:05,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:06,589 INFO L130 PetriNetUnfolder]: 0/506 cut-off events. [2022-11-20 09:28:06,590 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-20 09:28:06,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 800 conditions, 506 events. 0/506 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1169 event pairs, 0 based on Foata normal form. 7/513 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2022-11-20 09:28:06,591 INFO L137 encePairwiseOnDemand]: 494/499 looper letters, 42 selfloop transitions, 40 changer transitions 0/456 dead transitions. [2022-11-20 09:28:06,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 456 transitions, 1437 flow [2022-11-20 09:28:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 09:28:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-20 09:28:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 16679 transitions. [2022-11-20 09:28:06,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7958297547475904 [2022-11-20 09:28:06,608 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 16679 transitions. [2022-11-20 09:28:06,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 16679 transitions. [2022-11-20 09:28:06,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:06,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 16679 transitions. [2022-11-20 09:28:06,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 397.1190476190476) internal successors, (16679), 42 states have internal predecessors, (16679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:06,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:06,644 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 499.0) internal successors, (21457), 43 states have internal predecessors, (21457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:06,644 INFO L175 Difference]: Start difference. First operand has 470 places, 425 transitions, 1059 flow. Second operand 42 states and 16679 transitions. [2022-11-20 09:28:06,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 456 transitions, 1437 flow [2022-11-20 09:28:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 456 transitions, 1353 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-11-20 09:28:06,654 INFO L231 Difference]: Finished difference. Result has 487 places, 432 transitions, 1166 flow [2022-11-20 09:28:06,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=499, PETRI_DIFFERENCE_MINUEND_FLOW=978, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1166, PETRI_PLACES=487, PETRI_TRANSITIONS=432} [2022-11-20 09:28:06,655 INFO L288 CegarLoopForPetriNet]: 444 programPoint places, 43 predicate places. [2022-11-20 09:28:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 432 transitions, 1166 flow [2022-11-20 09:28:06,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 397.79411764705884) internal successors, (13525), 34 states have internal predecessors, (13525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:06,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:06,657 INFO L209 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:06,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-20 09:28:06,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-20 09:28:06,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:06,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:06,858 INFO L85 PathProgramCache]: Analyzing trace with hash -639908372, now seen corresponding path program 1 times [2022-11-20 09:28:06,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:06,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517141121] [2022-11-20 09:28:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:06,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:06,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:06,932 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:06,932 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:06,932 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:06,933 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:06,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-11-20 09:28:06,933 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:06,933 WARN L233 ceAbstractionStarter]: 13 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:06,934 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 14 thread instances. [2022-11-20 09:28:06,981 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:06,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 473 places, 532 transitions, 1316 flow [2022-11-20 09:28:07,300 INFO L130 PetriNetUnfolder]: 144/1031 cut-off events. [2022-11-20 09:28:07,300 INFO L131 PetriNetUnfolder]: For 546/546 co-relation queries the response was YES. [2022-11-20 09:28:07,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1179 conditions, 1031 events. 144/1031 cut-off events. For 546/546 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3676 event pairs, 0 based on Foata normal form. 0/857 useless extension candidates. Maximal degree in co-relation 1065. Up to 30 conditions per place. [2022-11-20 09:28:07,330 INFO L82 GeneralOperation]: Start removeDead. Operand has 473 places, 532 transitions, 1316 flow [2022-11-20 09:28:07,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 473 places, 532 transitions, 1316 flow [2022-11-20 09:28:07,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:07,345 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:07,345 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:07,350 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:07,350 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:07,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:07,351 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] [2022-11-20 09:28:07,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash -921039647, now seen corresponding path program 1 times [2022-11-20 09:28:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193183952] [2022-11-20 09:28:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:07,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:07,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:07,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193183952] [2022-11-20 09:28:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193183952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:07,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902965807] [2022-11-20 09:28:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:07,369 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 429 out of 532 [2022-11-20 09:28:07,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 532 transitions, 1316 flow. Second operand has 2 states, 2 states have (on average 429.5) internal successors, (859), 2 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:07,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 429 of 532 [2022-11-20 09:28:07,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:07,730 INFO L130 PetriNetUnfolder]: 0/872 cut-off events. [2022-11-20 09:28:07,731 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-20 09:28:07,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 872 events. 0/872 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3370 event pairs, 0 based on Foata normal form. 614/1456 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2022-11-20 09:28:07,732 INFO L137 encePairwiseOnDemand]: 444/532 looper letters, 14 selfloop transitions, 0 changer transitions 11/443 dead transitions. [2022-11-20 09:28:07,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 443 transitions, 1166 flow [2022-11-20 09:28:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 960 transitions. [2022-11-20 09:28:07,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9022556390977443 [2022-11-20 09:28:07,735 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 960 transitions. [2022-11-20 09:28:07,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 960 transitions. [2022-11-20 09:28:07,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:07,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 960 transitions. [2022-11-20 09:28:07,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 480.0) internal successors, (960), 2 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 532.0) internal successors, (1596), 3 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,738 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 532.0) internal successors, (1596), 3 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,738 INFO L175 Difference]: Start difference. First operand has 473 places, 532 transitions, 1316 flow. Second operand 2 states and 960 transitions. [2022-11-20 09:28:07,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 443 transitions, 1166 flow [2022-11-20 09:28:07,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 443 transitions, 984 flow, removed 91 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:07,749 INFO L231 Difference]: Finished difference. Result has 473 places, 432 transitions, 934 flow [2022-11-20 09:28:07,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=956, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=934, PETRI_PLACES=473, PETRI_TRANSITIONS=432} [2022-11-20 09:28:07,750 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 0 predicate places. [2022-11-20 09:28:07,750 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 432 transitions, 934 flow [2022-11-20 09:28:07,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 429.5) internal successors, (859), 2 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:07,751 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] [2022-11-20 09:28:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-11-20 09:28:07,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1576976290, now seen corresponding path program 1 times [2022-11-20 09:28:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:07,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930468046] [2022-11-20 09:28:07,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:07,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:07,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930468046] [2022-11-20 09:28:07,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930468046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:07,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:07,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070215180] [2022-11-20 09:28:07,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:07,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:07,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 422 out of 532 [2022-11-20 09:28:07,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 432 transitions, 934 flow. Second operand has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:07,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:07,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 422 of 532 [2022-11-20 09:28:07,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:08,251 INFO L130 PetriNetUnfolder]: 0/696 cut-off events. [2022-11-20 09:28:08,251 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 09:28:08,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 843 conditions, 696 events. 0/696 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2251 event pairs, 0 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 0. Up to 84 conditions per place. [2022-11-20 09:28:08,253 INFO L137 encePairwiseOnDemand]: 529/532 looper letters, 23 selfloop transitions, 2 changer transitions 0/436 dead transitions. [2022-11-20 09:28:08,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 436 transitions, 992 flow [2022-11-20 09:28:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1292 transitions. [2022-11-20 09:28:08,256 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095238095238095 [2022-11-20 09:28:08,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1292 transitions. [2022-11-20 09:28:08,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1292 transitions. [2022-11-20 09:28:08,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:08,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1292 transitions. [2022-11-20 09:28:08,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 430.6666666666667) internal successors, (1292), 3 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,261 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 532.0) internal successors, (2128), 4 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,261 INFO L175 Difference]: Start difference. First operand has 473 places, 432 transitions, 934 flow. Second operand 3 states and 1292 transitions. [2022-11-20 09:28:08,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 436 transitions, 992 flow [2022-11-20 09:28:08,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 436 transitions, 992 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:08,271 INFO L231 Difference]: Finished difference. Result has 465 places, 433 transitions, 946 flow [2022-11-20 09:28:08,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=946, PETRI_PLACES=465, PETRI_TRANSITIONS=433} [2022-11-20 09:28:08,272 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, -8 predicate places. [2022-11-20 09:28:08,272 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 433 transitions, 946 flow [2022-11-20 09:28:08,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 423.0) internal successors, (1269), 3 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:08,273 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] [2022-11-20 09:28:08,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-11-20 09:28:08,274 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 497768822, now seen corresponding path program 1 times [2022-11-20 09:28:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068888665] [2022-11-20 09:28:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068888665] [2022-11-20 09:28:08,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068888665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310616344] [2022-11-20 09:28:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:08,329 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:08,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 09:28:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:08,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:08,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:08,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310616344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:08,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:08,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160408949] [2022-11-20 09:28:08,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:08,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:08,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:08,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:08,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-20 09:28:08,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 433 transitions, 946 flow. Second operand has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:08,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:08,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-20 09:28:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:09,056 INFO L130 PetriNetUnfolder]: 0/674 cut-off events. [2022-11-20 09:28:09,057 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 09:28:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 674 events. 0/674 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2112 event pairs, 0 based on Foata normal form. 2/676 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-20 09:28:09,058 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 24 selfloop transitions, 9 changer transitions 0/443 dead transitions. [2022-11-20 09:28:09,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 443 transitions, 1034 flow [2022-11-20 09:28:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3824 transitions. [2022-11-20 09:28:09,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7986633249791144 [2022-11-20 09:28:09,062 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3824 transitions. [2022-11-20 09:28:09,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3824 transitions. [2022-11-20 09:28:09,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:09,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3824 transitions. [2022-11-20 09:28:09,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 424.8888888888889) internal successors, (3824), 9 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,068 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 532.0) internal successors, (5320), 10 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,068 INFO L175 Difference]: Start difference. First operand has 465 places, 433 transitions, 946 flow. Second operand 9 states and 3824 transitions. [2022-11-20 09:28:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 443 transitions, 1034 flow [2022-11-20 09:28:09,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 443 transitions, 1032 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:09,077 INFO L231 Difference]: Finished difference. Result has 475 places, 439 transitions, 994 flow [2022-11-20 09:28:09,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=994, PETRI_PLACES=475, PETRI_TRANSITIONS=439} [2022-11-20 09:28:09,078 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 2 predicate places. [2022-11-20 09:28:09,078 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 439 transitions, 994 flow [2022-11-20 09:28:09,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 423.3) internal successors, (4233), 10 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,080 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:09,080 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:09,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:09,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 09:28:09,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash 407301857, now seen corresponding path program 1 times [2022-11-20 09:28:09,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:09,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125293044] [2022-11-20 09:28:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125293044] [2022-11-20 09:28:09,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125293044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:09,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007348359] [2022-11-20 09:28:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:09,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:09,426 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:09,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 09:28:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:09,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:09,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007348359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:09,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:09,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238536843] [2022-11-20 09:28:09,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:09,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:09,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-20 09:28:09,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 439 transitions, 994 flow. Second operand has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:09,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:09,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-20 09:28:09,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:10,522 INFO L130 PetriNetUnfolder]: 0/630 cut-off events. [2022-11-20 09:28:10,522 INFO L131 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2022-11-20 09:28:10,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 630 events. 0/630 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1829 event pairs, 0 based on Foata normal form. 4/634 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 09:28:10,523 INFO L137 encePairwiseOnDemand]: 526/532 looper letters, 32 selfloop transitions, 21 changer transitions 0/463 dead transitions. [2022-11-20 09:28:10,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 463 transitions, 1208 flow [2022-11-20 09:28:10,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:10,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8898 transitions. [2022-11-20 09:28:10,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7964554242749732 [2022-11-20 09:28:10,530 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8898 transitions. [2022-11-20 09:28:10,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8898 transitions. [2022-11-20 09:28:10,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:10,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8898 transitions. [2022-11-20 09:28:10,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 423.7142857142857) internal successors, (8898), 21 states have internal predecessors, (8898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,547 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 532.0) internal successors, (11704), 22 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,547 INFO L175 Difference]: Start difference. First operand has 475 places, 439 transitions, 994 flow. Second operand 21 states and 8898 transitions. [2022-11-20 09:28:10,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 463 transitions, 1208 flow [2022-11-20 09:28:10,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 463 transitions, 1194 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:10,555 INFO L231 Difference]: Finished difference. Result has 499 places, 452 transitions, 1118 flow [2022-11-20 09:28:10,556 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1118, PETRI_PLACES=499, PETRI_TRANSITIONS=452} [2022-11-20 09:28:10,556 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 26 predicate places. [2022-11-20 09:28:10,557 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 452 transitions, 1118 flow [2022-11-20 09:28:10,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 423.6111111111111) internal successors, (7625), 18 states have internal predecessors, (7625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:10,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:10,558 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:10,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:10,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:10,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1073274307, now seen corresponding path program 1 times [2022-11-20 09:28:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:10,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518963039] [2022-11-20 09:28:10,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:10,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:11,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518963039] [2022-11-20 09:28:11,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518963039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713137895] [2022-11-20 09:28:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:11,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:11,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:11,072 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 09:28:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:11,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:11,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:12,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713137895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:12,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:12,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:12,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039488289] [2022-11-20 09:28:12,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:12,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:12,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:12,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:12,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 421 out of 532 [2022-11-20 09:28:12,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 452 transitions, 1118 flow. Second operand has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:12,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:12,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 421 of 532 [2022-11-20 09:28:12,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:13,077 INFO L130 PetriNetUnfolder]: 0/542 cut-off events. [2022-11-20 09:28:13,078 INFO L131 PetriNetUnfolder]: For 249/249 co-relation queries the response was YES. [2022-11-20 09:28:13,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 542 events. 0/542 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1267 event pairs, 0 based on Foata normal form. 8/550 useless extension candidates. Maximal degree in co-relation 0. Up to 25 conditions per place. [2022-11-20 09:28:13,079 INFO L137 encePairwiseOnDemand]: 527/532 looper letters, 45 selfloop transitions, 43 changer transitions 0/488 dead transitions. [2022-11-20 09:28:13,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 488 transitions, 1542 flow [2022-11-20 09:28:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:28:13,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:28:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 19041 transitions. [2022-11-20 09:28:13,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7953634085213033 [2022-11-20 09:28:13,092 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 19041 transitions. [2022-11-20 09:28:13,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 19041 transitions. [2022-11-20 09:28:13,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:13,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 19041 transitions. [2022-11-20 09:28:13,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 423.1333333333333) internal successors, (19041), 45 states have internal predecessors, (19041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:13,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:13,123 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 532.0) internal successors, (24472), 46 states have internal predecessors, (24472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:13,123 INFO L175 Difference]: Start difference. First operand has 499 places, 452 transitions, 1118 flow. Second operand 45 states and 19041 transitions. [2022-11-20 09:28:13,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 488 transitions, 1542 flow [2022-11-20 09:28:13,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 488 transitions, 1452 flow, removed 13 selfloop flow, removed 13 redundant places. [2022-11-20 09:28:13,130 INFO L231 Difference]: Finished difference. Result has 519 places, 462 transitions, 1249 flow [2022-11-20 09:28:13,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=532, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1249, PETRI_PLACES=519, PETRI_TRANSITIONS=462} [2022-11-20 09:28:13,132 INFO L288 CegarLoopForPetriNet]: 473 programPoint places, 46 predicate places. [2022-11-20 09:28:13,132 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 462 transitions, 1249 flow [2022-11-20 09:28:13,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 423.79411764705884) internal successors, (14409), 34 states have internal predecessors, (14409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:13,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:13,135 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:13,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:13,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:13,336 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:13,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1626722253, now seen corresponding path program 1 times [2022-11-20 09:28:13,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:13,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142126510] [2022-11-20 09:28:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:13,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:13,476 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:13,476 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:13,476 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:13,476 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:13,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-11-20 09:28:13,477 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:13,477 WARN L233 ceAbstractionStarter]: 14 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:13,477 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 15 thread instances. [2022-11-20 09:28:13,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:13,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 502 places, 565 transitions, 1415 flow [2022-11-20 09:28:14,002 INFO L130 PetriNetUnfolder]: 154/1100 cut-off events. [2022-11-20 09:28:14,003 INFO L131 PetriNetUnfolder]: For 665/665 co-relation queries the response was YES. [2022-11-20 09:28:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 1100 events. 154/1100 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 3965 event pairs, 0 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 1151. Up to 32 conditions per place. [2022-11-20 09:28:14,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 502 places, 565 transitions, 1415 flow [2022-11-20 09:28:14,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 502 places, 565 transitions, 1415 flow [2022-11-20 09:28:14,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:14,061 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:14,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:14,066 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:14,067 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:14,067 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:14,067 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] [2022-11-20 09:28:14,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:14,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1455225183, now seen corresponding path program 1 times [2022-11-20 09:28:14,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:14,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585873885] [2022-11-20 09:28:14,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:14,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:14,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:14,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585873885] [2022-11-20 09:28:14,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585873885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:14,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:14,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:14,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288577709] [2022-11-20 09:28:14,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:14,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:14,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:14,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:14,084 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 455 out of 565 [2022-11-20 09:28:14,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 565 transitions, 1415 flow. Second operand has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:14,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 455 of 565 [2022-11-20 09:28:14,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:14,408 INFO L130 PetriNetUnfolder]: 0/930 cut-off events. [2022-11-20 09:28:14,408 INFO L131 PetriNetUnfolder]: For 785/785 co-relation queries the response was YES. [2022-11-20 09:28:14,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1112 conditions, 930 events. 0/930 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3617 event pairs, 0 based on Foata normal form. 702/1600 useless extension candidates. Maximal degree in co-relation 0. Up to 16 conditions per place. [2022-11-20 09:28:14,410 INFO L137 encePairwiseOnDemand]: 471/565 looper letters, 15 selfloop transitions, 0 changer transitions 11/470 dead transitions. [2022-11-20 09:28:14,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1255 flow [2022-11-20 09:28:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1019 transitions. [2022-11-20 09:28:14,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9017699115044248 [2022-11-20 09:28:14,416 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1019 transitions. [2022-11-20 09:28:14,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1019 transitions. [2022-11-20 09:28:14,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:14,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1019 transitions. [2022-11-20 09:28:14,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 509.5) internal successors, (1019), 2 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,420 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 565.0) internal successors, (1695), 3 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,420 INFO L175 Difference]: Start difference. First operand has 502 places, 565 transitions, 1415 flow. Second operand 2 states and 1019 transitions. [2022-11-20 09:28:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1255 flow [2022-11-20 09:28:14,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 470 transitions, 1045 flow, removed 105 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:14,430 INFO L231 Difference]: Finished difference. Result has 502 places, 459 transitions, 993 flow [2022-11-20 09:28:14,430 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=993, PETRI_PLACES=502, PETRI_TRANSITIONS=459} [2022-11-20 09:28:14,431 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 0 predicate places. [2022-11-20 09:28:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 459 transitions, 993 flow [2022-11-20 09:28:14,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 455.5) internal successors, (911), 2 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:14,432 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] [2022-11-20 09:28:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-11-20 09:28:14,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:14,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1042790754, now seen corresponding path program 1 times [2022-11-20 09:28:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:14,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704181172] [2022-11-20 09:28:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:14,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704181172] [2022-11-20 09:28:14,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704181172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:14,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:14,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:14,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390218331] [2022-11-20 09:28:14,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:14,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:14,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:14,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:14,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:14,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 448 out of 565 [2022-11-20 09:28:14,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 459 transitions, 993 flow. Second operand has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:14,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 448 of 565 [2022-11-20 09:28:14,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:14,780 INFO L130 PetriNetUnfolder]: 0/743 cut-off events. [2022-11-20 09:28:14,780 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 09:28:14,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 743 events. 0/743 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2425 event pairs, 0 based on Foata normal form. 0/728 useless extension candidates. Maximal degree in co-relation 0. Up to 90 conditions per place. [2022-11-20 09:28:14,781 INFO L137 encePairwiseOnDemand]: 562/565 looper letters, 24 selfloop transitions, 2 changer transitions 0/463 dead transitions. [2022-11-20 09:28:14,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 463 transitions, 1053 flow [2022-11-20 09:28:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1371 transitions. [2022-11-20 09:28:14,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8088495575221238 [2022-11-20 09:28:14,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1371 transitions. [2022-11-20 09:28:14,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1371 transitions. [2022-11-20 09:28:14,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:14,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1371 transitions. [2022-11-20 09:28:14,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 457.0) internal successors, (1371), 3 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,787 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 565.0) internal successors, (2260), 4 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,787 INFO L175 Difference]: Start difference. First operand has 502 places, 459 transitions, 993 flow. Second operand 3 states and 1371 transitions. [2022-11-20 09:28:14,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 463 transitions, 1053 flow [2022-11-20 09:28:14,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 463 transitions, 1053 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:14,792 INFO L231 Difference]: Finished difference. Result has 494 places, 460 transitions, 1005 flow [2022-11-20 09:28:14,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1005, PETRI_PLACES=494, PETRI_TRANSITIONS=460} [2022-11-20 09:28:14,793 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, -8 predicate places. [2022-11-20 09:28:14,793 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 460 transitions, 1005 flow [2022-11-20 09:28:14,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 449.0) internal successors, (1347), 3 states have internal predecessors, (1347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:14,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:14,794 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] [2022-11-20 09:28:14,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-11-20 09:28:14,794 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:14,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1743828086, now seen corresponding path program 1 times [2022-11-20 09:28:14,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:14,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676920468] [2022-11-20 09:28:14,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:14,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:14,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676920468] [2022-11-20 09:28:14,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676920468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:14,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400191662] [2022-11-20 09:28:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:14,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:14,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:14,843 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:14,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 09:28:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:15,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:15,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400191662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:15,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:15,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:15,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779128093] [2022-11-20 09:28:15,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:15,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:15,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:15,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:15,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:15,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-20 09:28:15,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 460 transitions, 1005 flow. Second operand has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:15,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-20 09:28:15,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:15,627 INFO L130 PetriNetUnfolder]: 0/721 cut-off events. [2022-11-20 09:28:15,627 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 09:28:15,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 721 events. 0/721 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2282 event pairs, 0 based on Foata normal form. 2/723 useless extension candidates. Maximal degree in co-relation 0. Up to 55 conditions per place. [2022-11-20 09:28:15,629 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 25 selfloop transitions, 9 changer transitions 0/470 dead transitions. [2022-11-20 09:28:15,629 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 470 transitions, 1095 flow [2022-11-20 09:28:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4059 transitions. [2022-11-20 09:28:15,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7982300884955752 [2022-11-20 09:28:15,632 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4059 transitions. [2022-11-20 09:28:15,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4059 transitions. [2022-11-20 09:28:15,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:15,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4059 transitions. [2022-11-20 09:28:15,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 451.0) internal successors, (4059), 9 states have internal predecessors, (4059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,641 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 565.0) internal successors, (5650), 10 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,642 INFO L175 Difference]: Start difference. First operand has 494 places, 460 transitions, 1005 flow. Second operand 9 states and 4059 transitions. [2022-11-20 09:28:15,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 470 transitions, 1095 flow [2022-11-20 09:28:15,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 470 transitions, 1093 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:15,647 INFO L231 Difference]: Finished difference. Result has 504 places, 466 transitions, 1053 flow [2022-11-20 09:28:15,647 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1053, PETRI_PLACES=504, PETRI_TRANSITIONS=466} [2022-11-20 09:28:15,648 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 2 predicate places. [2022-11-20 09:28:15,648 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 466 transitions, 1053 flow [2022-11-20 09:28:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 449.3) internal successors, (4493), 10 states have internal predecessors, (4493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:15,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:15,649 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:15,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:15,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-11-20 09:28:15,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 435117153, now seen corresponding path program 1 times [2022-11-20 09:28:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:15,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557338641] [2022-11-20 09:28:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:15,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:15,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557338641] [2022-11-20 09:28:15,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557338641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:15,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445631858] [2022-11-20 09:28:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:15,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:15,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:15,976 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:15,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 09:28:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:16,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:16,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:16,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445631858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:16,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:16,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:16,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428310444] [2022-11-20 09:28:16,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:16,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:16,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:16,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-20 09:28:16,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 466 transitions, 1053 flow. Second operand has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:16,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:16,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-20 09:28:16,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:17,231 INFO L130 PetriNetUnfolder]: 0/677 cut-off events. [2022-11-20 09:28:17,231 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-20 09:28:17,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 980 conditions, 677 events. 0/677 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2001 event pairs, 0 based on Foata normal form. 4/681 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 09:28:17,233 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 33 selfloop transitions, 21 changer transitions 0/490 dead transitions. [2022-11-20 09:28:17,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 490 transitions, 1269 flow [2022-11-20 09:28:17,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9445 transitions. [2022-11-20 09:28:17,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7960387694900969 [2022-11-20 09:28:17,243 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9445 transitions. [2022-11-20 09:28:17,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9445 transitions. [2022-11-20 09:28:17,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:17,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9445 transitions. [2022-11-20 09:28:17,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 449.76190476190476) internal successors, (9445), 21 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:17,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:17,266 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 565.0) internal successors, (12430), 22 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:17,266 INFO L175 Difference]: Start difference. First operand has 504 places, 466 transitions, 1053 flow. Second operand 21 states and 9445 transitions. [2022-11-20 09:28:17,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 490 transitions, 1269 flow [2022-11-20 09:28:17,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 490 transitions, 1255 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:17,275 INFO L231 Difference]: Finished difference. Result has 528 places, 479 transitions, 1177 flow [2022-11-20 09:28:17,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1177, PETRI_PLACES=528, PETRI_TRANSITIONS=479} [2022-11-20 09:28:17,275 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 26 predicate places. [2022-11-20 09:28:17,276 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 479 transitions, 1177 flow [2022-11-20 09:28:17,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 449.6111111111111) internal successors, (8093), 18 states have internal predecessors, (8093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:17,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:17,277 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:17,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-20 09:28:17,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:17,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1656795203, now seen corresponding path program 1 times [2022-11-20 09:28:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:17,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429304872] [2022-11-20 09:28:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:17,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:17,808 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:17,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429304872] [2022-11-20 09:28:17,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429304872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:17,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213460135] [2022-11-20 09:28:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:17,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:17,810 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:17,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 09:28:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:18,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:18,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:18,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213460135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:18,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:18,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:18,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954590450] [2022-11-20 09:28:18,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:18,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:18,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:18,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 447 out of 565 [2022-11-20 09:28:18,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 479 transitions, 1177 flow. Second operand has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:18,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:18,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 447 of 565 [2022-11-20 09:28:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:19,524 INFO L130 PetriNetUnfolder]: 0/589 cut-off events. [2022-11-20 09:28:19,525 INFO L131 PetriNetUnfolder]: For 276/276 co-relation queries the response was YES. [2022-11-20 09:28:19,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 589 events. 0/589 cut-off events. For 276/276 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1419 event pairs, 0 based on Foata normal form. 8/597 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2022-11-20 09:28:19,526 INFO L137 encePairwiseOnDemand]: 559/565 looper letters, 49 selfloop transitions, 45 changer transitions 0/530 dead transitions. [2022-11-20 09:28:19,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 530 transitions, 1681 flow [2022-11-20 09:28:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:28:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:28:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 20217 transitions. [2022-11-20 09:28:19,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7951622418879056 [2022-11-20 09:28:19,537 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 20217 transitions. [2022-11-20 09:28:19,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 20217 transitions. [2022-11-20 09:28:19,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:19,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 20217 transitions. [2022-11-20 09:28:19,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 449.26666666666665) internal successors, (20217), 45 states have internal predecessors, (20217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,570 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 565.0) internal successors, (25990), 46 states have internal predecessors, (25990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,571 INFO L175 Difference]: Start difference. First operand has 528 places, 479 transitions, 1177 flow. Second operand 45 states and 20217 transitions. [2022-11-20 09:28:19,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 530 transitions, 1681 flow [2022-11-20 09:28:19,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 530 transitions, 1641 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:19,579 INFO L231 Difference]: Finished difference. Result has 575 places, 504 transitions, 1455 flow [2022-11-20 09:28:19,579 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=565, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1455, PETRI_PLACES=575, PETRI_TRANSITIONS=504} [2022-11-20 09:28:19,580 INFO L288 CegarLoopForPetriNet]: 502 programPoint places, 73 predicate places. [2022-11-20 09:28:19,580 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 504 transitions, 1455 flow [2022-11-20 09:28:19,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 449.79411764705884) internal successors, (15293), 34 states have internal predecessors, (15293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:19,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:19,583 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:19,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 09:28:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:19,783 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:19,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1018229807, now seen corresponding path program 1 times [2022-11-20 09:28:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:19,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680957879] [2022-11-20 09:28:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:19,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:19,817 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:19,873 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:19,873 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:19,874 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:19,874 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:19,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-11-20 09:28:19,874 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 09:28:19,875 WARN L233 ceAbstractionStarter]: 15 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:19,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 16 thread instances. [2022-11-20 09:28:19,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:19,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 531 places, 598 transitions, 1516 flow [2022-11-20 09:28:20,340 INFO L130 PetriNetUnfolder]: 164/1169 cut-off events. [2022-11-20 09:28:20,340 INFO L131 PetriNetUnfolder]: For 800/800 co-relation queries the response was YES. [2022-11-20 09:28:20,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1354 conditions, 1169 events. 164/1169 cut-off events. For 800/800 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4213 event pairs, 0 based on Foata normal form. 0/971 useless extension candidates. Maximal degree in co-relation 1238. Up to 34 conditions per place. [2022-11-20 09:28:20,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 531 places, 598 transitions, 1516 flow [2022-11-20 09:28:20,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 531 places, 598 transitions, 1516 flow [2022-11-20 09:28:20,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:20,397 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:20,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:20,404 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:20,404 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:20,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:20,404 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] [2022-11-20 09:28:20,405 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:20,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash 434742049, now seen corresponding path program 1 times [2022-11-20 09:28:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:20,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433703176] [2022-11-20 09:28:20,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:20,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:20,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:20,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433703176] [2022-11-20 09:28:20,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433703176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:20,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:20,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:20,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191369021] [2022-11-20 09:28:20,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:20,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:20,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 481 out of 598 [2022-11-20 09:28:20,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 598 transitions, 1516 flow. Second operand has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:20,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 481 of 598 [2022-11-20 09:28:20,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:20,797 INFO L130 PetriNetUnfolder]: 0/988 cut-off events. [2022-11-20 09:28:20,798 INFO L131 PetriNetUnfolder]: For 936/936 co-relation queries the response was YES. [2022-11-20 09:28:20,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 988 events. 0/988 cut-off events. For 936/936 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 3864 event pairs, 0 based on Foata normal form. 796/1750 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2022-11-20 09:28:20,799 INFO L137 encePairwiseOnDemand]: 498/598 looper letters, 16 selfloop transitions, 0 changer transitions 11/497 dead transitions. [2022-11-20 09:28:20,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1346 flow [2022-11-20 09:28:20,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:20,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1078 transitions. [2022-11-20 09:28:20,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9013377926421404 [2022-11-20 09:28:20,801 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1078 transitions. [2022-11-20 09:28:20,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1078 transitions. [2022-11-20 09:28:20,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:20,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1078 transitions. [2022-11-20 09:28:20,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 539.0) internal successors, (1078), 2 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,803 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 598.0) internal successors, (1794), 3 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,803 INFO L175 Difference]: Start difference. First operand has 531 places, 598 transitions, 1516 flow. Second operand 2 states and 1078 transitions. [2022-11-20 09:28:20,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1346 flow [2022-11-20 09:28:20,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 497 transitions, 1106 flow, removed 120 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:20,810 INFO L231 Difference]: Finished difference. Result has 531 places, 486 transitions, 1052 flow [2022-11-20 09:28:20,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1052, PETRI_PLACES=531, PETRI_TRANSITIONS=486} [2022-11-20 09:28:20,811 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 0 predicate places. [2022-11-20 09:28:20,811 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 486 transitions, 1052 flow [2022-11-20 09:28:20,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 481.5) internal successors, (963), 2 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:20,812 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:20,812 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] [2022-11-20 09:28:20,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-11-20 09:28:20,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:20,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1362209310, now seen corresponding path program 1 times [2022-11-20 09:28:20,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:20,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938172519] [2022-11-20 09:28:20,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:20,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:20,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:20,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938172519] [2022-11-20 09:28:20,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938172519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:20,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:20,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:20,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651333180] [2022-11-20 09:28:20,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:20,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:20,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:20,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:20,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:20,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 474 out of 598 [2022-11-20 09:28:20,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 486 transitions, 1052 flow. Second operand has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 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) [2022-11-20 09:28:20,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:20,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 474 of 598 [2022-11-20 09:28:20,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:21,141 INFO L130 PetriNetUnfolder]: 0/790 cut-off events. [2022-11-20 09:28:21,141 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-20 09:28:21,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 957 conditions, 790 events. 0/790 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2596 event pairs, 0 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 0. Up to 96 conditions per place. [2022-11-20 09:28:21,143 INFO L137 encePairwiseOnDemand]: 595/598 looper letters, 25 selfloop transitions, 2 changer transitions 0/490 dead transitions. [2022-11-20 09:28:21,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 490 transitions, 1114 flow [2022-11-20 09:28:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1450 transitions. [2022-11-20 09:28:21,145 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8082497212931996 [2022-11-20 09:28:21,145 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1450 transitions. [2022-11-20 09:28:21,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1450 transitions. [2022-11-20 09:28:21,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:21,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1450 transitions. [2022-11-20 09:28:21,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 483.3333333333333) internal successors, (1450), 3 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,147 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 598.0) internal successors, (2392), 4 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,147 INFO L175 Difference]: Start difference. First operand has 531 places, 486 transitions, 1052 flow. Second operand 3 states and 1450 transitions. [2022-11-20 09:28:21,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 490 transitions, 1114 flow [2022-11-20 09:28:21,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 490 transitions, 1114 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:21,154 INFO L231 Difference]: Finished difference. Result has 523 places, 487 transitions, 1064 flow [2022-11-20 09:28:21,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1064, PETRI_PLACES=523, PETRI_TRANSITIONS=487} [2022-11-20 09:28:21,155 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, -8 predicate places. [2022-11-20 09:28:21,155 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 487 transitions, 1064 flow [2022-11-20 09:28:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 475.0) internal successors, (1425), 3 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) [2022-11-20 09:28:21,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:21,156 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] [2022-11-20 09:28:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-11-20 09:28:21,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:21,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash -112851242, now seen corresponding path program 1 times [2022-11-20 09:28:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:21,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645190502] [2022-11-20 09:28:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:21,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:21,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645190502] [2022-11-20 09:28:21,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645190502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178644112] [2022-11-20 09:28:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:21,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:21,205 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:21,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 09:28:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:21,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:21,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:21,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178644112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:21,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704579280] [2022-11-20 09:28:21,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:21,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:21,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:21,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:21,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-20 09:28:21,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 487 transitions, 1064 flow. Second operand has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:21,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-20 09:28:21,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:21,974 INFO L130 PetriNetUnfolder]: 0/768 cut-off events. [2022-11-20 09:28:21,974 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 09:28:21,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 768 events. 0/768 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2464 event pairs, 0 based on Foata normal form. 2/770 useless extension candidates. Maximal degree in co-relation 0. Up to 59 conditions per place. [2022-11-20 09:28:21,976 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 26 selfloop transitions, 9 changer transitions 0/497 dead transitions. [2022-11-20 09:28:21,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 497 transitions, 1156 flow [2022-11-20 09:28:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4294 transitions. [2022-11-20 09:28:21,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7978446674098848 [2022-11-20 09:28:21,979 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4294 transitions. [2022-11-20 09:28:21,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4294 transitions. [2022-11-20 09:28:21,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:21,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4294 transitions. [2022-11-20 09:28:21,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 477.1111111111111) internal successors, (4294), 9 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,985 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 598.0) internal successors, (5980), 10 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,985 INFO L175 Difference]: Start difference. First operand has 523 places, 487 transitions, 1064 flow. Second operand 9 states and 4294 transitions. [2022-11-20 09:28:21,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 497 transitions, 1156 flow [2022-11-20 09:28:21,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 497 transitions, 1154 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:21,990 INFO L231 Difference]: Finished difference. Result has 533 places, 493 transitions, 1112 flow [2022-11-20 09:28:21,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1112, PETRI_PLACES=533, PETRI_TRANSITIONS=493} [2022-11-20 09:28:21,991 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 2 predicate places. [2022-11-20 09:28:21,991 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 493 transitions, 1112 flow [2022-11-20 09:28:21,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 475.3) internal successors, (4753), 10 states have internal predecessors, (4753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:21,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:21,991 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:21,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-20 09:28:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-11-20 09:28:22,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:22,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1846186625, now seen corresponding path program 1 times [2022-11-20 09:28:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742627784] [2022-11-20 09:28:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:22,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:22,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742627784] [2022-11-20 09:28:22,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742627784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501600120] [2022-11-20 09:28:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:22,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:22,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:22,276 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:22,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 09:28:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:22,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:22,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501600120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:22,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668443814] [2022-11-20 09:28:22,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:22,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-20 09:28:22,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 493 transitions, 1112 flow. Second operand has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:22,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:22,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-20 09:28:22,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:23,317 INFO L130 PetriNetUnfolder]: 0/724 cut-off events. [2022-11-20 09:28:23,317 INFO L131 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-11-20 09:28:23,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 724 events. 0/724 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2164 event pairs, 0 based on Foata normal form. 4/728 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 09:28:23,318 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 34 selfloop transitions, 21 changer transitions 0/517 dead transitions. [2022-11-20 09:28:23,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 517 transitions, 1330 flow [2022-11-20 09:28:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 9992 transitions. [2022-11-20 09:28:23,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956681000159261 [2022-11-20 09:28:23,325 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 9992 transitions. [2022-11-20 09:28:23,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 9992 transitions. [2022-11-20 09:28:23,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:23,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 9992 transitions. [2022-11-20 09:28:23,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 475.8095238095238) internal successors, (9992), 21 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:23,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:23,339 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 598.0) internal successors, (13156), 22 states have internal predecessors, (13156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:23,340 INFO L175 Difference]: Start difference. First operand has 533 places, 493 transitions, 1112 flow. Second operand 21 states and 9992 transitions. [2022-11-20 09:28:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 517 transitions, 1330 flow [2022-11-20 09:28:23,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 517 transitions, 1316 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:23,346 INFO L231 Difference]: Finished difference. Result has 557 places, 506 transitions, 1236 flow [2022-11-20 09:28:23,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1236, PETRI_PLACES=557, PETRI_TRANSITIONS=506} [2022-11-20 09:28:23,347 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 26 predicate places. [2022-11-20 09:28:23,347 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 506 transitions, 1236 flow [2022-11-20 09:28:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 475.6111111111111) internal successors, (8561), 18 states have internal predecessors, (8561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:23,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:23,349 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:23,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 09:28:23,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:23,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash -778990109, now seen corresponding path program 1 times [2022-11-20 09:28:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:23,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211234240] [2022-11-20 09:28:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:23,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211234240] [2022-11-20 09:28:23,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211234240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:23,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180689461] [2022-11-20 09:28:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:23,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:23,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:23,780 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:23,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 09:28:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:24,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:24,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:24,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180689461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:24,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851456234] [2022-11-20 09:28:24,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:24,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-20 09:28:24,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 506 transitions, 1236 flow. Second operand has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:24,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:24,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-20 09:28:24,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:25,446 INFO L130 PetriNetUnfolder]: 0/636 cut-off events. [2022-11-20 09:28:25,446 INFO L131 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2022-11-20 09:28:25,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 636 events. 0/636 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1587 event pairs, 0 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 0. Up to 29 conditions per place. [2022-11-20 09:28:25,447 INFO L137 encePairwiseOnDemand]: 592/598 looper letters, 50 selfloop transitions, 45 changer transitions 0/557 dead transitions. [2022-11-20 09:28:25,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 601 places, 557 transitions, 1742 flow [2022-11-20 09:28:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:28:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:28:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 21388 transitions. [2022-11-20 09:28:25,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947974730583426 [2022-11-20 09:28:25,459 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 21388 transitions. [2022-11-20 09:28:25,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 21388 transitions. [2022-11-20 09:28:25,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:25,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 21388 transitions. [2022-11-20 09:28:25,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 475.2888888888889) internal successors, (21388), 45 states have internal predecessors, (21388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:25,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:25,489 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 598.0) internal successors, (27508), 46 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:25,489 INFO L175 Difference]: Start difference. First operand has 557 places, 506 transitions, 1236 flow. Second operand 45 states and 21388 transitions. [2022-11-20 09:28:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 601 places, 557 transitions, 1742 flow [2022-11-20 09:28:25,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 557 transitions, 1702 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:25,501 INFO L231 Difference]: Finished difference. Result has 604 places, 531 transitions, 1514 flow [2022-11-20 09:28:25,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1514, PETRI_PLACES=604, PETRI_TRANSITIONS=531} [2022-11-20 09:28:25,502 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 73 predicate places. [2022-11-20 09:28:25,502 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 531 transitions, 1514 flow [2022-11-20 09:28:25,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 475.79411764705884) internal successors, (16177), 34 states have internal predecessors, (16177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:25,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:25,504 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:25,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:25,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:25,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:25,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1064402135, now seen corresponding path program 1 times [2022-11-20 09:28:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:25,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792012489] [2022-11-20 09:28:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:25,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792012489] [2022-11-20 09:28:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792012489] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542396520] [2022-11-20 09:28:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:26,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:26,459 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:26,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 09:28:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:26,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:28:26,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:27,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:28,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542396520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:28,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:28,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:28:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787448188] [2022-11-20 09:28:28,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:28:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:28:28,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:28:28,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 473 out of 598 [2022-11-20 09:28:28,200 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 531 transitions, 1514 flow. Second operand has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,200 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:28,200 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 473 of 598 [2022-11-20 09:28:28,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:29,449 INFO L130 PetriNetUnfolder]: 0/614 cut-off events. [2022-11-20 09:28:29,449 INFO L131 PetriNetUnfolder]: For 409/409 co-relation queries the response was YES. [2022-11-20 09:28:29,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 614 events. 0/614 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1463 event pairs, 0 based on Foata normal form. 2/616 useless extension candidates. Maximal degree in co-relation 0. Up to 28 conditions per place. [2022-11-20 09:28:29,450 INFO L137 encePairwiseOnDemand]: 593/598 looper letters, 51 selfloop transitions, 49 changer transitions 0/552 dead transitions. [2022-11-20 09:28:29,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 552 transitions, 1852 flow [2022-11-20 09:28:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 09:28:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-20 09:28:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 24225 transitions. [2022-11-20 09:28:29,462 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.794314381270903 [2022-11-20 09:28:29,462 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 24225 transitions. [2022-11-20 09:28:29,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 24225 transitions. [2022-11-20 09:28:29,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:29,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 24225 transitions. [2022-11-20 09:28:29,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 475.0) internal successors, (24225), 51 states have internal predecessors, (24225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,512 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 598.0) internal successors, (31096), 52 states have internal predecessors, (31096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,512 INFO L175 Difference]: Start difference. First operand has 604 places, 531 transitions, 1514 flow. Second operand 51 states and 24225 transitions. [2022-11-20 09:28:29,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 552 transitions, 1852 flow [2022-11-20 09:28:29,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 552 transitions, 1715 flow, removed 11 selfloop flow, removed 33 redundant places. [2022-11-20 09:28:29,525 INFO L231 Difference]: Finished difference. Result has 610 places, 523 transitions, 1471 flow [2022-11-20 09:28:29,525 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=598, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1471, PETRI_PLACES=610, PETRI_TRANSITIONS=523} [2022-11-20 09:28:29,526 INFO L288 CegarLoopForPetriNet]: 531 programPoint places, 79 predicate places. [2022-11-20 09:28:29,526 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 523 transitions, 1471 flow [2022-11-20 09:28:29,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 475.8939393939394) internal successors, (31409), 66 states have internal predecessors, (31409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:29,531 INFO L209 CegarLoopForPetriNet]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:29,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:29,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-11-20 09:28:29,737 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1486777266, now seen corresponding path program 1 times [2022-11-20 09:28:29,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:29,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067574933] [2022-11-20 09:28:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:29,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:29,769 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:29,821 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:29,821 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:29,821 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:29,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:29,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-11-20 09:28:29,822 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:29,822 WARN L233 ceAbstractionStarter]: 16 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:29,822 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 17 thread instances. [2022-11-20 09:28:29,875 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:29,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 560 places, 631 transitions, 1619 flow [2022-11-20 09:28:30,441 INFO L130 PetriNetUnfolder]: 174/1238 cut-off events. [2022-11-20 09:28:30,441 INFO L131 PetriNetUnfolder]: For 952/952 co-relation queries the response was YES. [2022-11-20 09:28:30,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 1238 events. 174/1238 cut-off events. For 952/952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4460 event pairs, 0 based on Foata normal form. 0/1028 useless extension candidates. Maximal degree in co-relation 1326. Up to 36 conditions per place. [2022-11-20 09:28:30,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 560 places, 631 transitions, 1619 flow [2022-11-20 09:28:30,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 560 places, 631 transitions, 1619 flow [2022-11-20 09:28:30,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:30,545 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:30,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:30,550 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:30,550 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:30,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:30,550 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] [2022-11-20 09:28:30,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash 453894753, now seen corresponding path program 1 times [2022-11-20 09:28:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:30,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896533293] [2022-11-20 09:28:30,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:30,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:30,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896533293] [2022-11-20 09:28:30,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896533293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:30,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:30,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:30,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673271397] [2022-11-20 09:28:30,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:30,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:30,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:30,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 507 out of 631 [2022-11-20 09:28:30,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 631 transitions, 1619 flow. Second operand has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:30,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:30,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 507 of 631 [2022-11-20 09:28:30,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:31,009 INFO L130 PetriNetUnfolder]: 0/1046 cut-off events. [2022-11-20 09:28:31,009 INFO L131 PetriNetUnfolder]: For 1105/1105 co-relation queries the response was YES. [2022-11-20 09:28:31,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1269 conditions, 1046 events. 0/1046 cut-off events. For 1105/1105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4111 event pairs, 0 based on Foata normal form. 896/1906 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2022-11-20 09:28:31,010 INFO L137 encePairwiseOnDemand]: 525/631 looper letters, 17 selfloop transitions, 0 changer transitions 11/524 dead transitions. [2022-11-20 09:28:31,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1439 flow [2022-11-20 09:28:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1137 transitions. [2022-11-20 09:28:31,012 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9009508716323297 [2022-11-20 09:28:31,012 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1137 transitions. [2022-11-20 09:28:31,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1137 transitions. [2022-11-20 09:28:31,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:31,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1137 transitions. [2022-11-20 09:28:31,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 568.5) internal successors, (1137), 2 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,014 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 631.0) internal successors, (1893), 3 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,014 INFO L175 Difference]: Start difference. First operand has 560 places, 631 transitions, 1619 flow. Second operand 2 states and 1137 transitions. [2022-11-20 09:28:31,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1439 flow [2022-11-20 09:28:31,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 524 transitions, 1167 flow, removed 136 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:31,024 INFO L231 Difference]: Finished difference. Result has 560 places, 513 transitions, 1111 flow [2022-11-20 09:28:31,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1111, PETRI_PLACES=560, PETRI_TRANSITIONS=513} [2022-11-20 09:28:31,025 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 0 predicate places. [2022-11-20 09:28:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 513 transitions, 1111 flow [2022-11-20 09:28:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 507.5) internal successors, (1015), 2 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:31,026 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] [2022-11-20 09:28:31,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-11-20 09:28:31,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:31,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:31,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1343056606, now seen corresponding path program 1 times [2022-11-20 09:28:31,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:31,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550192078] [2022-11-20 09:28:31,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:31,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:31,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:31,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550192078] [2022-11-20 09:28:31,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550192078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:31,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:31,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:31,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601906384] [2022-11-20 09:28:31,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:31,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:31,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:31,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 500 out of 631 [2022-11-20 09:28:31,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 513 transitions, 1111 flow. Second operand has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:31,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 500 of 631 [2022-11-20 09:28:31,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:31,387 INFO L130 PetriNetUnfolder]: 0/837 cut-off events. [2022-11-20 09:28:31,387 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 09:28:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014 conditions, 837 events. 0/837 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2765 event pairs, 0 based on Foata normal form. 0/820 useless extension candidates. Maximal degree in co-relation 0. Up to 102 conditions per place. [2022-11-20 09:28:31,388 INFO L137 encePairwiseOnDemand]: 628/631 looper letters, 26 selfloop transitions, 2 changer transitions 0/517 dead transitions. [2022-11-20 09:28:31,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 517 transitions, 1175 flow [2022-11-20 09:28:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1529 transitions. [2022-11-20 09:28:31,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8077126254622292 [2022-11-20 09:28:31,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1529 transitions. [2022-11-20 09:28:31,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1529 transitions. [2022-11-20 09:28:31,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:31,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1529 transitions. [2022-11-20 09:28:31,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 509.6666666666667) internal successors, (1529), 3 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 631.0) internal successors, (2524), 4 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,393 INFO L175 Difference]: Start difference. First operand has 560 places, 513 transitions, 1111 flow. Second operand 3 states and 1529 transitions. [2022-11-20 09:28:31,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 517 transitions, 1175 flow [2022-11-20 09:28:31,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 517 transitions, 1175 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:31,398 INFO L231 Difference]: Finished difference. Result has 552 places, 514 transitions, 1123 flow [2022-11-20 09:28:31,399 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1123, PETRI_PLACES=552, PETRI_TRANSITIONS=514} [2022-11-20 09:28:31,399 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, -8 predicate places. [2022-11-20 09:28:31,399 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 514 transitions, 1123 flow [2022-11-20 09:28:31,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 501.0) internal successors, (1503), 3 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:31,400 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] [2022-11-20 09:28:31,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-11-20 09:28:31,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -777301866, now seen corresponding path program 1 times [2022-11-20 09:28:31,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159109696] [2022-11-20 09:28:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:31,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:31,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159109696] [2022-11-20 09:28:31,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159109696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:31,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169758448] [2022-11-20 09:28:31,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:31,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:31,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:31,444 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:31,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 09:28:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:31,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:31,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169758448] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:31,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:31,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:31,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086820327] [2022-11-20 09:28:31,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:31,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:31,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:31,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:31,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:31,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-20 09:28:31,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 514 transitions, 1123 flow. Second operand has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:31,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-20 09:28:31,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:32,408 INFO L130 PetriNetUnfolder]: 0/815 cut-off events. [2022-11-20 09:28:32,408 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 09:28:32,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 815 events. 0/815 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2635 event pairs, 0 based on Foata normal form. 2/817 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-20 09:28:32,411 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 27 selfloop transitions, 9 changer transitions 0/524 dead transitions. [2022-11-20 09:28:32,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 524 transitions, 1217 flow [2022-11-20 09:28:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4529 transitions. [2022-11-20 09:28:32,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7974995597816517 [2022-11-20 09:28:32,415 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4529 transitions. [2022-11-20 09:28:32,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4529 transitions. [2022-11-20 09:28:32,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:32,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4529 transitions. [2022-11-20 09:28:32,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 503.22222222222223) internal successors, (4529), 9 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:32,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:32,423 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 631.0) internal successors, (6310), 10 states have internal predecessors, (6310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:32,423 INFO L175 Difference]: Start difference. First operand has 552 places, 514 transitions, 1123 flow. Second operand 9 states and 4529 transitions. [2022-11-20 09:28:32,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 524 transitions, 1217 flow [2022-11-20 09:28:32,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 524 transitions, 1215 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:32,431 INFO L231 Difference]: Finished difference. Result has 562 places, 520 transitions, 1171 flow [2022-11-20 09:28:32,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1171, PETRI_PLACES=562, PETRI_TRANSITIONS=520} [2022-11-20 09:28:32,432 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 2 predicate places. [2022-11-20 09:28:32,432 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 520 transitions, 1171 flow [2022-11-20 09:28:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 501.3) internal successors, (5013), 10 states have internal predecessors, (5013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:32,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:32,433 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:32,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-20 09:28:32,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:32,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 345542977, now seen corresponding path program 1 times [2022-11-20 09:28:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473304067] [2022-11-20 09:28:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:32,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473304067] [2022-11-20 09:28:32,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473304067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107334353] [2022-11-20 09:28:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:32,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:32,726 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 09:28:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:33,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:33,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:33,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107334353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:33,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:33,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820756873] [2022-11-20 09:28:33,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:33,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:33,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:33,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-20 09:28:33,267 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 520 transitions, 1171 flow. Second operand has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:33,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-20 09:28:33,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:33,910 INFO L130 PetriNetUnfolder]: 0/771 cut-off events. [2022-11-20 09:28:33,910 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-20 09:28:33,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1116 conditions, 771 events. 0/771 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2334 event pairs, 0 based on Foata normal form. 4/775 useless extension candidates. Maximal degree in co-relation 0. Up to 47 conditions per place. [2022-11-20 09:28:33,912 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 35 selfloop transitions, 21 changer transitions 0/544 dead transitions. [2022-11-20 09:28:33,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 544 transitions, 1391 flow [2022-11-20 09:28:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:33,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 10539 transitions. [2022-11-20 09:28:33,918 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7953362010414309 [2022-11-20 09:28:33,918 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 10539 transitions. [2022-11-20 09:28:33,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 10539 transitions. [2022-11-20 09:28:33,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:33,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 10539 transitions. [2022-11-20 09:28:33,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 501.85714285714283) internal successors, (10539), 21 states have internal predecessors, (10539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 631.0) internal successors, (13882), 22 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,935 INFO L175 Difference]: Start difference. First operand has 562 places, 520 transitions, 1171 flow. Second operand 21 states and 10539 transitions. [2022-11-20 09:28:33,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 544 transitions, 1391 flow [2022-11-20 09:28:33,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 581 places, 544 transitions, 1377 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:33,941 INFO L231 Difference]: Finished difference. Result has 586 places, 533 transitions, 1295 flow [2022-11-20 09:28:33,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1295, PETRI_PLACES=586, PETRI_TRANSITIONS=533} [2022-11-20 09:28:33,942 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 26 predicate places. [2022-11-20 09:28:33,942 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 533 transitions, 1295 flow [2022-11-20 09:28:33,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 501.6111111111111) internal successors, (9029), 18 states have internal predecessors, (9029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:33,944 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:33,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-20 09:28:34,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:34,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1939114333, now seen corresponding path program 1 times [2022-11-20 09:28:34,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:34,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680535727] [2022-11-20 09:28:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:34,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:34,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680535727] [2022-11-20 09:28:34,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680535727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:34,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362879860] [2022-11-20 09:28:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:34,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:34,410 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:34,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 09:28:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362879860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:35,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:35,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504025481] [2022-11-20 09:28:35,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:35,329 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-20 09:28:35,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 533 transitions, 1295 flow. Second operand has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:35,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:35,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-20 09:28:35,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:36,309 INFO L130 PetriNetUnfolder]: 0/683 cut-off events. [2022-11-20 09:28:36,310 INFO L131 PetriNetUnfolder]: For 330/330 co-relation queries the response was YES. [2022-11-20 09:28:36,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 683 events. 0/683 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1758 event pairs, 0 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 09:28:36,311 INFO L137 encePairwiseOnDemand]: 625/631 looper letters, 51 selfloop transitions, 45 changer transitions 0/584 dead transitions. [2022-11-20 09:28:36,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 584 transitions, 1803 flow [2022-11-20 09:28:36,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:28:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:28:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 22559 transitions. [2022-11-20 09:28:36,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944708575453425 [2022-11-20 09:28:36,323 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 22559 transitions. [2022-11-20 09:28:36,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 22559 transitions. [2022-11-20 09:28:36,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:36,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 22559 transitions. [2022-11-20 09:28:36,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 501.31111111111113) internal successors, (22559), 45 states have internal predecessors, (22559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,355 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 631.0) internal successors, (29026), 46 states have internal predecessors, (29026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,355 INFO L175 Difference]: Start difference. First operand has 586 places, 533 transitions, 1295 flow. Second operand 45 states and 22559 transitions. [2022-11-20 09:28:36,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 584 transitions, 1803 flow [2022-11-20 09:28:36,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 584 transitions, 1763 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:36,365 INFO L231 Difference]: Finished difference. Result has 633 places, 558 transitions, 1573 flow [2022-11-20 09:28:36,366 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1573, PETRI_PLACES=633, PETRI_TRANSITIONS=558} [2022-11-20 09:28:36,367 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 73 predicate places. [2022-11-20 09:28:36,367 INFO L495 AbstractCegarLoop]: Abstraction has has 633 places, 558 transitions, 1573 flow [2022-11-20 09:28:36,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 501.79411764705884) internal successors, (17061), 34 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,370 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:36,370 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:36,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:36,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:36,577 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1036859799, now seen corresponding path program 1 times [2022-11-20 09:28:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:36,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643449754] [2022-11-20 09:28:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:36,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:37,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:37,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643449754] [2022-11-20 09:28:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643449754] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402779587] [2022-11-20 09:28:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:37,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:37,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:37,364 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:37,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 09:28:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:28:37,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:38,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:39,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402779587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:39,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:39,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:28:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110311206] [2022-11-20 09:28:39,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:39,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:28:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:39,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:28:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:28:39,117 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 499 out of 631 [2022-11-20 09:28:39,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 558 transitions, 1573 flow. Second operand has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:39,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:39,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 499 of 631 [2022-11-20 09:28:39,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:40,466 INFO L130 PetriNetUnfolder]: 0/650 cut-off events. [2022-11-20 09:28:40,466 INFO L131 PetriNetUnfolder]: For 530/530 co-relation queries the response was YES. [2022-11-20 09:28:40,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096 conditions, 650 events. 0/650 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1561 event pairs, 0 based on Foata normal form. 3/653 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2022-11-20 09:28:40,468 INFO L137 encePairwiseOnDemand]: 626/631 looper letters, 54 selfloop transitions, 52 changer transitions 0/584 dead transitions. [2022-11-20 09:28:40,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 584 transitions, 1967 flow [2022-11-20 09:28:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-20 09:28:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-20 09:28:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 27055 transitions. [2022-11-20 09:28:40,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940071608851323 [2022-11-20 09:28:40,483 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 27055 transitions. [2022-11-20 09:28:40,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 27055 transitions. [2022-11-20 09:28:40,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:40,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 27055 transitions. [2022-11-20 09:28:40,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 501.01851851851853) internal successors, (27055), 54 states have internal predecessors, (27055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:40,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:40,527 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 631.0) internal successors, (34705), 55 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:40,527 INFO L175 Difference]: Start difference. First operand has 633 places, 558 transitions, 1573 flow. Second operand 54 states and 27055 transitions. [2022-11-20 09:28:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 584 transitions, 1967 flow [2022-11-20 09:28:40,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 584 transitions, 1822 flow, removed 12 selfloop flow, removed 33 redundant places. [2022-11-20 09:28:40,537 INFO L231 Difference]: Finished difference. Result has 642 places, 553 transitions, 1559 flow [2022-11-20 09:28:40,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=631, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=1559, PETRI_PLACES=642, PETRI_TRANSITIONS=553} [2022-11-20 09:28:40,538 INFO L288 CegarLoopForPetriNet]: 560 programPoint places, 82 predicate places. [2022-11-20 09:28:40,538 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 553 transitions, 1559 flow [2022-11-20 09:28:40,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 501.8939393939394) internal successors, (33125), 66 states have internal predecessors, (33125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:40,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:40,543 INFO L209 CegarLoopForPetriNet]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:40,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-11-20 09:28:40,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:40,743 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1484304650, now seen corresponding path program 1 times [2022-11-20 09:28:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:40,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110568705] [2022-11-20 09:28:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:40,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:40,836 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:40,836 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:40,837 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:40,837 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:40,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-11-20 09:28:40,837 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:40,838 WARN L233 ceAbstractionStarter]: 17 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:40,838 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 18 thread instances. [2022-11-20 09:28:40,894 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:40,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 589 places, 664 transitions, 1724 flow [2022-11-20 09:28:41,436 INFO L130 PetriNetUnfolder]: 184/1307 cut-off events. [2022-11-20 09:28:41,437 INFO L131 PetriNetUnfolder]: For 1122/1122 co-relation queries the response was YES. [2022-11-20 09:28:41,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1533 conditions, 1307 events. 184/1307 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 4739 event pairs, 0 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 1415. Up to 38 conditions per place. [2022-11-20 09:28:41,475 INFO L82 GeneralOperation]: Start removeDead. Operand has 589 places, 664 transitions, 1724 flow [2022-11-20 09:28:41,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 589 places, 664 transitions, 1724 flow [2022-11-20 09:28:41,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:41,496 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:41,496 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:41,502 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:41,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:41,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:41,502 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] [2022-11-20 09:28:41,502 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1397767071, now seen corresponding path program 1 times [2022-11-20 09:28:41,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100015327] [2022-11-20 09:28:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:41,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100015327] [2022-11-20 09:28:41,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100015327] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:41,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:41,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:41,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615885303] [2022-11-20 09:28:41,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:41,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:41,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:41,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:41,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:41,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 533 out of 664 [2022-11-20 09:28:41,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 664 transitions, 1724 flow. Second operand has 2 states, 2 states have (on average 533.5) internal successors, (1067), 2 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:41,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:41,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 533 of 664 [2022-11-20 09:28:41,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:42,061 INFO L130 PetriNetUnfolder]: 0/1104 cut-off events. [2022-11-20 09:28:42,061 INFO L131 PetriNetUnfolder]: For 1293/1293 co-relation queries the response was YES. [2022-11-20 09:28:42,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1349 conditions, 1104 events. 0/1104 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4358 event pairs, 0 based on Foata normal form. 1002/2068 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-11-20 09:28:42,063 INFO L137 encePairwiseOnDemand]: 552/664 looper letters, 18 selfloop transitions, 0 changer transitions 11/551 dead transitions. [2022-11-20 09:28:42,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 551 transitions, 1534 flow [2022-11-20 09:28:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1196 transitions. [2022-11-20 09:28:42,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9006024096385542 [2022-11-20 09:28:42,065 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1196 transitions. [2022-11-20 09:28:42,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1196 transitions. [2022-11-20 09:28:42,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:42,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1196 transitions. [2022-11-20 09:28:42,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 598.0) internal successors, (1196), 2 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 664.0) internal successors, (1992), 3 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,068 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 664.0) internal successors, (1992), 3 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,068 INFO L175 Difference]: Start difference. First operand has 589 places, 664 transitions, 1724 flow. Second operand 2 states and 1196 transitions. [2022-11-20 09:28:42,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 551 transitions, 1534 flow [2022-11-20 09:28:42,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 551 transitions, 1228 flow, removed 153 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:42,077 INFO L231 Difference]: Finished difference. Result has 589 places, 540 transitions, 1170 flow [2022-11-20 09:28:42,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1170, PETRI_PLACES=589, PETRI_TRANSITIONS=540} [2022-11-20 09:28:42,078 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 0 predicate places. [2022-11-20 09:28:42,078 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 540 transitions, 1170 flow [2022-11-20 09:28:42,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 533.5) internal successors, (1067), 2 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:42,079 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] [2022-11-20 09:28:42,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-11-20 09:28:42,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1100248866, now seen corresponding path program 1 times [2022-11-20 09:28:42,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:42,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016879832] [2022-11-20 09:28:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:42,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:42,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:42,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016879832] [2022-11-20 09:28:42,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016879832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:42,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:42,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:42,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15076051] [2022-11-20 09:28:42,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:42,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:42,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:42,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 526 out of 664 [2022-11-20 09:28:42,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 540 transitions, 1170 flow. Second operand has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:42,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 526 of 664 [2022-11-20 09:28:42,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:42,469 INFO L130 PetriNetUnfolder]: 0/884 cut-off events. [2022-11-20 09:28:42,469 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 09:28:42,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 884 events. 0/884 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2938 event pairs, 0 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 0. Up to 108 conditions per place. [2022-11-20 09:28:42,470 INFO L137 encePairwiseOnDemand]: 661/664 looper letters, 27 selfloop transitions, 2 changer transitions 0/544 dead transitions. [2022-11-20 09:28:42,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 544 transitions, 1236 flow [2022-11-20 09:28:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:42,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1608 transitions. [2022-11-20 09:28:42,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8072289156626506 [2022-11-20 09:28:42,472 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1608 transitions. [2022-11-20 09:28:42,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1608 transitions. [2022-11-20 09:28:42,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:42,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1608 transitions. [2022-11-20 09:28:42,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 536.0) internal successors, (1608), 3 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,474 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 664.0) internal successors, (2656), 4 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,474 INFO L175 Difference]: Start difference. First operand has 589 places, 540 transitions, 1170 flow. Second operand 3 states and 1608 transitions. [2022-11-20 09:28:42,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 544 transitions, 1236 flow [2022-11-20 09:28:42,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 544 transitions, 1236 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:42,483 INFO L231 Difference]: Finished difference. Result has 581 places, 541 transitions, 1182 flow [2022-11-20 09:28:42,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1182, PETRI_PLACES=581, PETRI_TRANSITIONS=541} [2022-11-20 09:28:42,484 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, -8 predicate places. [2022-11-20 09:28:42,484 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 541 transitions, 1182 flow [2022-11-20 09:28:42,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 527.0) internal successors, (1581), 3 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:42,485 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] [2022-11-20 09:28:42,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-11-20 09:28:42,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash -249523786, now seen corresponding path program 1 times [2022-11-20 09:28:42,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:42,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907394772] [2022-11-20 09:28:42,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:42,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:42,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:42,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907394772] [2022-11-20 09:28:42,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907394772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:42,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680379844] [2022-11-20 09:28:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:42,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:42,532 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 09:28:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:42,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:42,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:42,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680379844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:42,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142938289] [2022-11-20 09:28:42,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:42,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:42,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:42,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-20 09:28:42,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 541 transitions, 1182 flow. Second operand has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:42,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:42,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-20 09:28:42,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:43,500 INFO L130 PetriNetUnfolder]: 0/862 cut-off events. [2022-11-20 09:28:43,500 INFO L131 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2022-11-20 09:28:43,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 862 events. 0/862 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2806 event pairs, 0 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-20 09:28:43,504 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 28 selfloop transitions, 9 changer transitions 0/551 dead transitions. [2022-11-20 09:28:43,504 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 551 transitions, 1278 flow [2022-11-20 09:28:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4764 transitions. [2022-11-20 09:28:43,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7971887550200804 [2022-11-20 09:28:43,581 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4764 transitions. [2022-11-20 09:28:43,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4764 transitions. [2022-11-20 09:28:43,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:43,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4764 transitions. [2022-11-20 09:28:43,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 529.3333333333334) internal successors, (4764), 9 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,595 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 664.0) internal successors, (6640), 10 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,595 INFO L175 Difference]: Start difference. First operand has 581 places, 541 transitions, 1182 flow. Second operand 9 states and 4764 transitions. [2022-11-20 09:28:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 551 transitions, 1278 flow [2022-11-20 09:28:43,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 551 transitions, 1276 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:43,604 INFO L231 Difference]: Finished difference. Result has 591 places, 547 transitions, 1230 flow [2022-11-20 09:28:43,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1230, PETRI_PLACES=591, PETRI_TRANSITIONS=547} [2022-11-20 09:28:43,605 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 2 predicate places. [2022-11-20 09:28:43,605 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 547 transitions, 1230 flow [2022-11-20 09:28:43,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 527.3) internal successors, (5273), 10 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:43,606 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:43,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:43,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:43,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:43,806 INFO L85 PathProgramCache]: Analyzing trace with hash 228153505, now seen corresponding path program 1 times [2022-11-20 09:28:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749715842] [2022-11-20 09:28:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:43,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:43,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749715842] [2022-11-20 09:28:43,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749715842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853001882] [2022-11-20 09:28:43,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:43,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:43,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:43,908 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:43,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 09:28:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:44,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:28:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853001882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:44,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:44,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:28:44,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583795050] [2022-11-20 09:28:44,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:44,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:28:44,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:28:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:28:44,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-20 09:28:44,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 547 transitions, 1230 flow. Second operand has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:44,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:44,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-20 09:28:44,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:45,153 INFO L130 PetriNetUnfolder]: 0/818 cut-off events. [2022-11-20 09:28:45,153 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-20 09:28:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 818 events. 0/818 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2504 event pairs, 0 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 0. Up to 51 conditions per place. [2022-11-20 09:28:45,155 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 36 selfloop transitions, 21 changer transitions 0/571 dead transitions. [2022-11-20 09:28:45,156 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 571 transitions, 1452 flow [2022-11-20 09:28:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:28:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:28:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 11086 transitions. [2022-11-20 09:28:45,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7950372920252439 [2022-11-20 09:28:45,166 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 11086 transitions. [2022-11-20 09:28:45,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 11086 transitions. [2022-11-20 09:28:45,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:45,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 11086 transitions. [2022-11-20 09:28:45,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 527.9047619047619) internal successors, (11086), 21 states have internal predecessors, (11086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,184 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 664.0) internal successors, (14608), 22 states have internal predecessors, (14608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,184 INFO L175 Difference]: Start difference. First operand has 591 places, 547 transitions, 1230 flow. Second operand 21 states and 11086 transitions. [2022-11-20 09:28:45,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 571 transitions, 1452 flow [2022-11-20 09:28:45,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 571 transitions, 1438 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:45,194 INFO L231 Difference]: Finished difference. Result has 615 places, 560 transitions, 1354 flow [2022-11-20 09:28:45,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=590, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1354, PETRI_PLACES=615, PETRI_TRANSITIONS=560} [2022-11-20 09:28:45,194 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 26 predicate places. [2022-11-20 09:28:45,195 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 560 transitions, 1354 flow [2022-11-20 09:28:45,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 527.6111111111111) internal successors, (9497), 18 states have internal predecessors, (9497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:45,196 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:45,196 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:45,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-20 09:28:45,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:45,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:45,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:45,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1823577469, now seen corresponding path program 1 times [2022-11-20 09:28:45,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:45,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106585528] [2022-11-20 09:28:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:45,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:45,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:45,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106585528] [2022-11-20 09:28:45,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106585528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:45,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129907208] [2022-11-20 09:28:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:45,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:45,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:45,656 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:45,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 09:28:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:46,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:28:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:46,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:46,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129907208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:46,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:46,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:28:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29511191] [2022-11-20 09:28:46,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:28:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:28:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:28:46,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-20 09:28:46,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 560 transitions, 1354 flow. Second operand has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:46,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:46,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-20 09:28:46,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:47,593 INFO L130 PetriNetUnfolder]: 0/730 cut-off events. [2022-11-20 09:28:47,593 INFO L131 PetriNetUnfolder]: For 357/357 co-relation queries the response was YES. [2022-11-20 09:28:47,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 730 events. 0/730 cut-off events. For 357/357 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1932 event pairs, 0 based on Foata normal form. 8/738 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-20 09:28:47,594 INFO L137 encePairwiseOnDemand]: 658/664 looper letters, 52 selfloop transitions, 45 changer transitions 0/611 dead transitions. [2022-11-20 09:28:47,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 611 transitions, 1864 flow [2022-11-20 09:28:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:28:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:28:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 23730 transitions. [2022-11-20 09:28:47,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941767068273092 [2022-11-20 09:28:47,608 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 23730 transitions. [2022-11-20 09:28:47,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 23730 transitions. [2022-11-20 09:28:47,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:47,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 23730 transitions. [2022-11-20 09:28:47,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 527.3333333333334) internal successors, (23730), 45 states have internal predecessors, (23730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,645 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 664.0) internal successors, (30544), 46 states have internal predecessors, (30544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,645 INFO L175 Difference]: Start difference. First operand has 615 places, 560 transitions, 1354 flow. Second operand 45 states and 23730 transitions. [2022-11-20 09:28:47,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 611 transitions, 1864 flow [2022-11-20 09:28:47,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 653 places, 611 transitions, 1824 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:28:47,655 INFO L231 Difference]: Finished difference. Result has 662 places, 585 transitions, 1632 flow [2022-11-20 09:28:47,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1632, PETRI_PLACES=662, PETRI_TRANSITIONS=585} [2022-11-20 09:28:47,656 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 73 predicate places. [2022-11-20 09:28:47,656 INFO L495 AbstractCegarLoop]: Abstraction has has 662 places, 585 transitions, 1632 flow [2022-11-20 09:28:47,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 527.7941176470588) internal successors, (17945), 34 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:47,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:47,658 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:47,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-11-20 09:28:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-11-20 09:28:47,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:47,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:47,859 INFO L85 PathProgramCache]: Analyzing trace with hash 828442231, now seen corresponding path program 1 times [2022-11-20 09:28:47,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:47,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529009661] [2022-11-20 09:28:47,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:47,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:48,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529009661] [2022-11-20 09:28:48,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529009661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439540528] [2022-11-20 09:28:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:48,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:48,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:48,753 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:48,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 09:28:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:49,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:28:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:49,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:50,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439540528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:50,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:50,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:28:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253665765] [2022-11-20 09:28:50,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:50,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:28:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:28:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:28:50,527 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 525 out of 664 [2022-11-20 09:28:50,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 662 places, 585 transitions, 1632 flow. Second operand has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:50,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:50,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 525 of 664 [2022-11-20 09:28:50,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:51,755 INFO L130 PetriNetUnfolder]: 0/686 cut-off events. [2022-11-20 09:28:51,756 INFO L131 PetriNetUnfolder]: For 651/651 co-relation queries the response was YES. [2022-11-20 09:28:51,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 686 events. 0/686 cut-off events. For 651/651 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1659 event pairs, 0 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-20 09:28:51,757 INFO L137 encePairwiseOnDemand]: 659/664 looper letters, 57 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2022-11-20 09:28:51,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 616 transitions, 2082 flow [2022-11-20 09:28:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 09:28:51,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-20 09:28:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 30041 transitions. [2022-11-20 09:28:51,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7937275417459311 [2022-11-20 09:28:51,771 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 30041 transitions. [2022-11-20 09:28:51,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 30041 transitions. [2022-11-20 09:28:51,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:51,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 30041 transitions. [2022-11-20 09:28:51,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 527.0350877192982) internal successors, (30041), 57 states have internal predecessors, (30041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,813 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 664.0) internal successors, (38512), 58 states have internal predecessors, (38512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,813 INFO L175 Difference]: Start difference. First operand has 662 places, 585 transitions, 1632 flow. Second operand 57 states and 30041 transitions. [2022-11-20 09:28:51,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 616 transitions, 2082 flow [2022-11-20 09:28:51,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 616 transitions, 1929 flow, removed 13 selfloop flow, removed 33 redundant places. [2022-11-20 09:28:51,825 INFO L231 Difference]: Finished difference. Result has 674 places, 583 transitions, 1647 flow [2022-11-20 09:28:51,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=664, PETRI_DIFFERENCE_MINUEND_FLOW=1468, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1647, PETRI_PLACES=674, PETRI_TRANSITIONS=583} [2022-11-20 09:28:51,826 INFO L288 CegarLoopForPetriNet]: 589 programPoint places, 85 predicate places. [2022-11-20 09:28:51,826 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 583 transitions, 1647 flow [2022-11-20 09:28:51,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 527.8939393939394) internal successors, (34841), 66 states have internal predecessors, (34841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:51,832 INFO L209 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:51,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:52,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:52,039 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 444372635, now seen corresponding path program 1 times [2022-11-20 09:28:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566443310] [2022-11-20 09:28:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:52,066 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:28:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:28:52,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:28:52,118 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:28:52,118 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:28:52,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:28:52,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-11-20 09:28:52,119 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:52,119 WARN L233 ceAbstractionStarter]: 18 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:28:52,119 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 19 thread instances. [2022-11-20 09:28:52,187 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:28:52,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 618 places, 697 transitions, 1831 flow [2022-11-20 09:28:52,666 INFO L130 PetriNetUnfolder]: 194/1376 cut-off events. [2022-11-20 09:28:52,666 INFO L131 PetriNetUnfolder]: For 1311/1311 co-relation queries the response was YES. [2022-11-20 09:28:52,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 1376 events. 194/1376 cut-off events. For 1311/1311 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 5001 event pairs, 0 based on Foata normal form. 0/1142 useless extension candidates. Maximal degree in co-relation 1505. Up to 40 conditions per place. [2022-11-20 09:28:52,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 618 places, 697 transitions, 1831 flow [2022-11-20 09:28:52,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 618 places, 697 transitions, 1831 flow [2022-11-20 09:28:52,731 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:52,731 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:52,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:28:52,737 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:28:52,738 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:52,738 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:52,738 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] [2022-11-20 09:28:52,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:52,739 INFO L85 PathProgramCache]: Analyzing trace with hash -825276127, now seen corresponding path program 1 times [2022-11-20 09:28:52,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:52,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065359047] [2022-11-20 09:28:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:52,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:52,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:52,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065359047] [2022-11-20 09:28:52,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065359047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:52,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:52,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862615312] [2022-11-20 09:28:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:52,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:28:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:28:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:28:52,759 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 559 out of 697 [2022-11-20 09:28:52,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 697 transitions, 1831 flow. Second operand has 2 states, 2 states have (on average 559.5) internal successors, (1119), 2 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:52,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:52,760 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 559 of 697 [2022-11-20 09:28:52,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:53,259 INFO L130 PetriNetUnfolder]: 0/1162 cut-off events. [2022-11-20 09:28:53,259 INFO L131 PetriNetUnfolder]: For 1501/1501 co-relation queries the response was YES. [2022-11-20 09:28:53,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 1162 events. 0/1162 cut-off events. For 1501/1501 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 4625 event pairs, 0 based on Foata normal form. 1114/2236 useless extension candidates. Maximal degree in co-relation 0. Up to 20 conditions per place. [2022-11-20 09:28:53,261 INFO L137 encePairwiseOnDemand]: 579/697 looper letters, 19 selfloop transitions, 0 changer transitions 11/578 dead transitions. [2022-11-20 09:28:53,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 578 transitions, 1631 flow [2022-11-20 09:28:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:28:53,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:28:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1255 transitions. [2022-11-20 09:28:53,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.900286944045911 [2022-11-20 09:28:53,263 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1255 transitions. [2022-11-20 09:28:53,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1255 transitions. [2022-11-20 09:28:53,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:53,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1255 transitions. [2022-11-20 09:28:53,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 627.5) internal successors, (1255), 2 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 697.0) internal successors, (2091), 3 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,266 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 697.0) internal successors, (2091), 3 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,266 INFO L175 Difference]: Start difference. First operand has 618 places, 697 transitions, 1831 flow. Second operand 2 states and 1255 transitions. [2022-11-20 09:28:53,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 578 transitions, 1631 flow [2022-11-20 09:28:53,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 578 transitions, 1289 flow, removed 171 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:53,275 INFO L231 Difference]: Finished difference. Result has 618 places, 567 transitions, 1229 flow [2022-11-20 09:28:53,275 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=617, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1229, PETRI_PLACES=618, PETRI_TRANSITIONS=567} [2022-11-20 09:28:53,276 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, 0 predicate places. [2022-11-20 09:28:53,276 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 567 transitions, 1229 flow [2022-11-20 09:28:53,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 559.5) internal successors, (1119), 2 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:53,276 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] [2022-11-20 09:28:53,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-11-20 09:28:53,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1672739810, now seen corresponding path program 1 times [2022-11-20 09:28:53,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:53,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103361488] [2022-11-20 09:28:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:53,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103361488] [2022-11-20 09:28:53,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103361488] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:53,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:53,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:53,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97816363] [2022-11-20 09:28:53,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:53,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:53,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:53,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 552 out of 697 [2022-11-20 09:28:53,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 567 transitions, 1229 flow. Second operand has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:53,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 552 of 697 [2022-11-20 09:28:53,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:53,823 INFO L130 PetriNetUnfolder]: 0/931 cut-off events. [2022-11-20 09:28:53,823 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-20 09:28:53,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128 conditions, 931 events. 0/931 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3109 event pairs, 0 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 0. Up to 114 conditions per place. [2022-11-20 09:28:53,825 INFO L137 encePairwiseOnDemand]: 694/697 looper letters, 28 selfloop transitions, 2 changer transitions 0/571 dead transitions. [2022-11-20 09:28:53,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 571 transitions, 1297 flow [2022-11-20 09:28:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1687 transitions. [2022-11-20 09:28:53,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8067910090865614 [2022-11-20 09:28:53,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1687 transitions. [2022-11-20 09:28:53,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1687 transitions. [2022-11-20 09:28:53,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:53,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1687 transitions. [2022-11-20 09:28:53,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 562.3333333333334) internal successors, (1687), 3 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 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) [2022-11-20 09:28:53,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 697.0) internal successors, (2788), 4 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) [2022-11-20 09:28:53,830 INFO L175 Difference]: Start difference. First operand has 618 places, 567 transitions, 1229 flow. Second operand 3 states and 1687 transitions. [2022-11-20 09:28:53,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 571 transitions, 1297 flow [2022-11-20 09:28:53,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 571 transitions, 1297 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:28:53,838 INFO L231 Difference]: Finished difference. Result has 610 places, 568 transitions, 1241 flow [2022-11-20 09:28:53,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1241, PETRI_PLACES=610, PETRI_TRANSITIONS=568} [2022-11-20 09:28:53,840 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, -8 predicate places. [2022-11-20 09:28:53,840 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 568 transitions, 1241 flow [2022-11-20 09:28:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 553.0) internal successors, (1659), 3 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:53,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:53,840 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] [2022-11-20 09:28:53,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-11-20 09:28:53,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:28:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1470482998, now seen corresponding path program 1 times [2022-11-20 09:28:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552458839] [2022-11-20 09:28:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:53,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552458839] [2022-11-20 09:28:53,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552458839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:53,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44347935] [2022-11-20 09:28:53,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:53,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:53,900 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:53,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 09:28:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:28:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:54,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:54,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44347935] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:54,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:54,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:28:54,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645703474] [2022-11-20 09:28:54,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:28:54,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:28:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:28:54,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 551 out of 697 [2022-11-20 09:28:54,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 568 transitions, 1241 flow. Second operand has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:54,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 551 of 697 [2022-11-20 09:28:54,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:54,961 INFO L130 PetriNetUnfolder]: 0/909 cut-off events. [2022-11-20 09:28:54,961 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 09:28:54,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 909 events. 0/909 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 2979 event pairs, 0 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-20 09:28:54,963 INFO L137 encePairwiseOnDemand]: 691/697 looper letters, 29 selfloop transitions, 9 changer transitions 0/578 dead transitions. [2022-11-20 09:28:54,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 578 transitions, 1339 flow [2022-11-20 09:28:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:28:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:28:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 4999 transitions. [2022-11-20 09:28:54,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7969073808385143 [2022-11-20 09:28:54,967 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 4999 transitions. [2022-11-20 09:28:54,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 4999 transitions. [2022-11-20 09:28:54,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:54,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 4999 transitions. [2022-11-20 09:28:54,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 555.4444444444445) internal successors, (4999), 9 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,974 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 697.0) internal successors, (6970), 10 states have internal predecessors, (6970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,974 INFO L175 Difference]: Start difference. First operand has 610 places, 568 transitions, 1241 flow. Second operand 9 states and 4999 transitions. [2022-11-20 09:28:54,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 578 transitions, 1339 flow [2022-11-20 09:28:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 578 transitions, 1337 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:54,981 INFO L231 Difference]: Finished difference. Result has 620 places, 574 transitions, 1289 flow [2022-11-20 09:28:54,981 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=697, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1289, PETRI_PLACES=620, PETRI_TRANSITIONS=574} [2022-11-20 09:28:54,981 INFO L288 CegarLoopForPetriNet]: 618 programPoint places, 2 predicate places. [2022-11-20 09:28:54,981 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 574 transitions, 1289 flow [2022-11-20 09:28:54,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 553.3) internal successors, (5533), 10 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:54,982 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:54,982 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] WARNING: YOUR LOGFILE WAS TOO LONG, SOME LINES IN THE MIDDLE WERE REMOVED. [2022-11-20 09:31:18,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:18,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2036581219, now seen corresponding path program 1 times [2022-11-20 09:31:18,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:18,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110828098] [2022-11-20 09:31:18,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:18,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:18,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110828098] [2022-11-20 09:31:18,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110828098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:18,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641531831] [2022-11-20 09:31:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:18,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:18,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:18,804 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:18,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-20 09:31:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:19,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:19,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:19,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:20,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641531831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:20,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:20,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:31:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794958195] [2022-11-20 09:31:20,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:20,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:31:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:20,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:31:20,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:31:20,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-11-20 09:31:20,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 934 places, 857 transitions, 2003 flow. Second operand has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:20,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:20,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-11-20 09:31:20,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:21,613 INFO L130 PetriNetUnfolder]: 0/1247 cut-off events. [2022-11-20 09:31:21,613 INFO L131 PetriNetUnfolder]: For 654/654 co-relation queries the response was YES. [2022-11-20 09:31:21,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 1247 events. 0/1247 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3798 event pairs, 0 based on Foata normal form. 8/1255 useless extension candidates. Maximal degree in co-relation 0. Up to 63 conditions per place. [2022-11-20 09:31:21,616 INFO L137 encePairwiseOnDemand]: 1021/1027 looper letters, 63 selfloop transitions, 45 changer transitions 0/908 dead transitions. [2022-11-20 09:31:21,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 978 places, 908 transitions, 2535 flow [2022-11-20 09:31:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:31:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:31:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 36611 transitions. [2022-11-20 09:31:21,634 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7921886833279238 [2022-11-20 09:31:21,634 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 36611 transitions. [2022-11-20 09:31:21,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 36611 transitions. [2022-11-20 09:31:21,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:21,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 36611 transitions. [2022-11-20 09:31:21,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 813.5777777777778) internal successors, (36611), 45 states have internal predecessors, (36611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,687 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1027.0) internal successors, (47242), 46 states have internal predecessors, (47242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,687 INFO L175 Difference]: Start difference. First operand has 934 places, 857 transitions, 2003 flow. Second operand 45 states and 36611 transitions. [2022-11-20 09:31:21,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 978 places, 908 transitions, 2535 flow [2022-11-20 09:31:21,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 972 places, 908 transitions, 2495 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:31:21,699 INFO L231 Difference]: Finished difference. Result has 981 places, 882 transitions, 2281 flow [2022-11-20 09:31:21,699 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2281, PETRI_PLACES=981, PETRI_TRANSITIONS=882} [2022-11-20 09:31:21,700 INFO L288 CegarLoopForPetriNet]: 908 programPoint places, 73 predicate places. [2022-11-20 09:31:21,700 INFO L495 AbstractCegarLoop]: Abstraction has has 981 places, 882 transitions, 2281 flow [2022-11-20 09:31:21,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 813.7941176470588) internal successors, (27669), 34 states have internal predecessors, (27669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:21,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:21,702 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:21,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-20 09:31:21,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:21,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -517014441, now seen corresponding path program 1 times [2022-11-20 09:31:21,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:21,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326842844] [2022-11-20 09:31:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:21,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326842844] [2022-11-20 09:31:22,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326842844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:22,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865385050] [2022-11-20 09:31:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:22,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:22,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:22,483 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:22,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-20 09:31:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:23,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:31:23,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:23,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:24,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865385050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:24,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:24,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:31:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816047047] [2022-11-20 09:31:24,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:24,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:31:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:24,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:31:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:31:24,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 811 out of 1027 [2022-11-20 09:31:24,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 981 places, 882 transitions, 2281 flow. Second operand has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:24,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:24,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 811 of 1027 [2022-11-20 09:31:24,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:27,523 INFO L130 PetriNetUnfolder]: 0/1082 cut-off events. [2022-11-20 09:31:27,523 INFO L131 PetriNetUnfolder]: For 1982/1982 co-relation queries the response was YES. [2022-11-20 09:31:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1852 conditions, 1082 events. 0/1082 cut-off events. For 1982/1982 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2737 event pairs, 0 based on Foata normal form. 15/1097 useless extension candidates. Maximal degree in co-relation 0. Up to 54 conditions per place. [2022-11-20 09:31:27,524 INFO L137 encePairwiseOnDemand]: 1022/1027 looper letters, 90 selfloop transitions, 88 changer transitions 0/968 dead transitions. [2022-11-20 09:31:27,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1059 places, 968 transitions, 3347 flow [2022-11-20 09:31:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-20 09:31:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2022-11-20 09:31:27,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 73183 transitions. [2022-11-20 09:31:27,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917667423996538 [2022-11-20 09:31:27,559 INFO L72 ComplementDD]: Start complementDD. Operand 90 states and 73183 transitions. [2022-11-20 09:31:27,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 73183 transitions. [2022-11-20 09:31:27,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:27,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 90 states and 73183 transitions. [2022-11-20 09:31:27,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 91 states, 90 states have (on average 813.1444444444444) internal successors, (73183), 90 states have internal predecessors, (73183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:27,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:27,659 INFO L81 ComplementDD]: Finished complementDD. Result has 91 states, 91 states have (on average 1027.0) internal successors, (93457), 91 states have internal predecessors, (93457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:27,660 INFO L175 Difference]: Start difference. First operand has 981 places, 882 transitions, 2281 flow. Second operand 90 states and 73183 transitions. [2022-11-20 09:31:27,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1059 places, 968 transitions, 3347 flow [2022-11-20 09:31:27,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1026 places, 968 transitions, 3106 flow, removed 24 selfloop flow, removed 33 redundant places. [2022-11-20 09:31:27,674 INFO L231 Difference]: Finished difference. Result has 1026 places, 913 transitions, 2615 flow [2022-11-20 09:31:27,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1027, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=937, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=825, PETRI_DIFFERENCE_SUBTRAHEND_STATES=90, PETRI_FLOW=2615, PETRI_PLACES=1026, PETRI_TRANSITIONS=913} [2022-11-20 09:31:27,675 INFO L288 CegarLoopForPetriNet]: 908 programPoint places, 118 predicate places. [2022-11-20 09:31:27,675 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 913 transitions, 2615 flow [2022-11-20 09:31:27,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 813.8939393939394) internal successors, (53717), 66 states have internal predecessors, (53717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:27,681 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:27,682 INFO L209 CegarLoopForPetriNet]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:27,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:27,890 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:27,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1024905612, now seen corresponding path program 1 times [2022-11-20 09:31:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:27,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602467472] [2022-11-20 09:31:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:31:27,942 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:31:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:31:28,010 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:31:28,010 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:31:28,011 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:31:28,011 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:31:28,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2022-11-20 09:31:28,011 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:28,012 WARN L233 ceAbstractionStarter]: 29 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:31:28,012 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 30 thread instances. [2022-11-20 09:31:28,090 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:31:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 1060 transitions, 3140 flow [2022-11-20 09:31:29,107 INFO L130 PetriNetUnfolder]: 304/2135 cut-off events. [2022-11-20 09:31:29,108 INFO L131 PetriNetUnfolder]: For 4930/4930 co-relation queries the response was YES. [2022-11-20 09:31:29,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 2135 events. 304/2135 cut-off events. For 4930/4930 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 7786 event pairs, 0 based on Foata normal form. 0/1769 useless extension candidates. Maximal degree in co-relation 2561. Up to 62 conditions per place. [2022-11-20 09:31:29,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 1060 transitions, 3140 flow [2022-11-20 09:31:29,303 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 937 places, 1060 transitions, 3140 flow [2022-11-20 09:31:29,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:31:29,304 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:31:29,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:31:29,308 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:31:29,308 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:31:29,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:29,308 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] [2022-11-20 09:31:29,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2037517599, now seen corresponding path program 1 times [2022-11-20 09:31:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:29,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137300413] [2022-11-20 09:31:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:29,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:29,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:29,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137300413] [2022-11-20 09:31:29,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137300413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:29,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:29,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:29,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587205132] [2022-11-20 09:31:29,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:29,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:31:29,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:29,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:31:29,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:31:29,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 845 out of 1060 [2022-11-20 09:31:29,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 1060 transitions, 3140 flow. Second operand has 2 states, 2 states have (on average 845.5) internal successors, (1691), 2 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:29,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:29,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 845 of 1060 [2022-11-20 09:31:29,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:30,511 INFO L130 PetriNetUnfolder]: 0/1800 cut-off events. [2022-11-20 09:31:30,511 INFO L131 PetriNetUnfolder]: For 5395/5395 co-relation queries the response was YES. [2022-11-20 09:31:30,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 1800 events. 0/1800 cut-off events. For 5395/5395 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7322 event pairs, 0 based on Foata normal form. 2742/4480 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2022-11-20 09:31:30,515 INFO L137 encePairwiseOnDemand]: 876/1060 looper letters, 30 selfloop transitions, 0 changer transitions 11/875 dead transitions. [2022-11-20 09:31:30,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 875 transitions, 2830 flow [2022-11-20 09:31:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:31:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:31:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1904 transitions. [2022-11-20 09:31:30,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8981132075471698 [2022-11-20 09:31:30,518 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1904 transitions. [2022-11-20 09:31:30,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1904 transitions. [2022-11-20 09:31:30,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:30,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1904 transitions. [2022-11-20 09:31:30,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 952.0) internal successors, (1904), 2 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:30,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1060.0) internal successors, (3180), 3 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:30,523 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1060.0) internal successors, (3180), 3 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:30,523 INFO L175 Difference]: Start difference. First operand has 937 places, 1060 transitions, 3140 flow. Second operand 2 states and 1904 transitions. [2022-11-20 09:31:30,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 875 transitions, 2830 flow [2022-11-20 09:31:30,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 937 places, 875 transitions, 1960 flow, removed 435 selfloop flow, removed 0 redundant places. [2022-11-20 09:31:30,544 INFO L231 Difference]: Finished difference. Result has 937 places, 864 transitions, 1878 flow [2022-11-20 09:31:30,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=936, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=875, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1878, PETRI_PLACES=937, PETRI_TRANSITIONS=864} [2022-11-20 09:31:30,545 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, 0 predicate places. [2022-11-20 09:31:30,545 INFO L495 AbstractCegarLoop]: Abstraction has has 937 places, 864 transitions, 1878 flow [2022-11-20 09:31:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 845.5) internal successors, (1691), 2 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:30,546 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:30,546 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] [2022-11-20 09:31:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2022-11-20 09:31:30,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:30,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash 460498338, now seen corresponding path program 1 times [2022-11-20 09:31:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:30,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564219515] [2022-11-20 09:31:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:30,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:30,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564219515] [2022-11-20 09:31:30,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564219515] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:30,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:30,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:30,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684815105] [2022-11-20 09:31:30,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:30,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:30,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:30,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:30,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:30,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 838 out of 1060 [2022-11-20 09:31:30,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 937 places, 864 transitions, 1878 flow. Second operand has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:30,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:30,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 838 of 1060 [2022-11-20 09:31:30,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:31,542 INFO L130 PetriNetUnfolder]: 0/1448 cut-off events. [2022-11-20 09:31:31,542 INFO L131 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2022-11-20 09:31:31,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1755 conditions, 1448 events. 0/1448 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4990 event pairs, 0 based on Foata normal form. 0/1418 useless extension candidates. Maximal degree in co-relation 0. Up to 180 conditions per place. [2022-11-20 09:31:31,545 INFO L137 encePairwiseOnDemand]: 1057/1060 looper letters, 39 selfloop transitions, 2 changer transitions 0/868 dead transitions. [2022-11-20 09:31:31,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 928 places, 868 transitions, 1968 flow [2022-11-20 09:31:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:31,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:31:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2556 transitions. [2022-11-20 09:31:31,548 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8037735849056604 [2022-11-20 09:31:31,548 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2556 transitions. [2022-11-20 09:31:31,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2556 transitions. [2022-11-20 09:31:31,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:31,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2556 transitions. [2022-11-20 09:31:31,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 852.0) internal successors, (2556), 3 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1060.0) internal successors, (4240), 4 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,554 INFO L175 Difference]: Start difference. First operand has 937 places, 864 transitions, 1878 flow. Second operand 3 states and 2556 transitions. [2022-11-20 09:31:31,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 928 places, 868 transitions, 1968 flow [2022-11-20 09:31:31,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 928 places, 868 transitions, 1968 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:31:31,567 INFO L231 Difference]: Finished difference. Result has 929 places, 865 transitions, 1890 flow [2022-11-20 09:31:31,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=926, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=862, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1890, PETRI_PLACES=929, PETRI_TRANSITIONS=865} [2022-11-20 09:31:31,568 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, -8 predicate places. [2022-11-20 09:31:31,568 INFO L495 AbstractCegarLoop]: Abstraction has has 929 places, 865 transitions, 1890 flow [2022-11-20 09:31:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 839.0) internal successors, (2517), 3 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:31,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:31,569 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] [2022-11-20 09:31:31,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2022-11-20 09:31:31,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash 293404278, now seen corresponding path program 1 times [2022-11-20 09:31:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:31,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865475215] [2022-11-20 09:31:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:31,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:31,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:31,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865475215] [2022-11-20 09:31:31,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865475215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:31,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401902258] [2022-11-20 09:31:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:31,621 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:31,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-20 09:31:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:32,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401902258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:32,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:32,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:31:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025813139] [2022-11-20 09:31:32,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:32,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:31:32,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-11-20 09:31:32,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 929 places, 865 transitions, 1890 flow. Second operand has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:32,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:32,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-11-20 09:31:32,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:33,749 INFO L130 PetriNetUnfolder]: 0/1426 cut-off events. [2022-11-20 09:31:33,749 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-20 09:31:33,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 1426 events. 0/1426 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4857 event pairs, 0 based on Foata normal form. 2/1428 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-20 09:31:33,752 INFO L137 encePairwiseOnDemand]: 1054/1060 looper letters, 40 selfloop transitions, 9 changer transitions 0/875 dead transitions. [2022-11-20 09:31:33,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 937 places, 875 transitions, 2010 flow [2022-11-20 09:31:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:31:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7584 transitions. [2022-11-20 09:31:33,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7949685534591195 [2022-11-20 09:31:33,758 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7584 transitions. [2022-11-20 09:31:33,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7584 transitions. [2022-11-20 09:31:33,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:33,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7584 transitions. [2022-11-20 09:31:33,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 842.6666666666666) internal successors, (7584), 9 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,768 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1060.0) internal successors, (10600), 10 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,768 INFO L175 Difference]: Start difference. First operand has 929 places, 865 transitions, 1890 flow. Second operand 9 states and 7584 transitions. [2022-11-20 09:31:33,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 937 places, 875 transitions, 2010 flow [2022-11-20 09:31:33,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 875 transitions, 2008 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:31:33,777 INFO L231 Difference]: Finished difference. Result has 939 places, 871 transitions, 1938 flow [2022-11-20 09:31:33,777 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=928, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1938, PETRI_PLACES=939, PETRI_TRANSITIONS=871} [2022-11-20 09:31:33,777 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, 2 predicate places. [2022-11-20 09:31:33,777 INFO L495 AbstractCegarLoop]: Abstraction has has 939 places, 871 transitions, 1938 flow [2022-11-20 09:31:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 839.3) internal successors, (8393), 10 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:33,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:33,778 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:33,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-11-20 09:31:33,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-11-20 09:31:33,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash -660876831, now seen corresponding path program 1 times [2022-11-20 09:31:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:33,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708397822] [2022-11-20 09:31:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:34,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708397822] [2022-11-20 09:31:34,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708397822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:34,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055900049] [2022-11-20 09:31:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:34,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:34,056 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:34,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-20 09:31:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:35,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:31:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055900049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:35,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:35,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:31:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196760059] [2022-11-20 09:31:35,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:35,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:31:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:31:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:31:35,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-11-20 09:31:35,259 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 939 places, 871 transitions, 1938 flow. Second operand has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:35,259 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:35,259 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-11-20 09:31:35,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:36,658 INFO L130 PetriNetUnfolder]: 0/1382 cut-off events. [2022-11-20 09:31:36,658 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-20 09:31:36,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2000 conditions, 1382 events. 0/1382 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4544 event pairs, 0 based on Foata normal form. 4/1386 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-20 09:31:36,661 INFO L137 encePairwiseOnDemand]: 1054/1060 looper letters, 48 selfloop transitions, 21 changer transitions 0/895 dead transitions. [2022-11-20 09:31:36,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 895 transitions, 2184 flow [2022-11-20 09:31:36,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:31:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:31:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 17650 transitions. [2022-11-20 09:31:36,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7929020664869721 [2022-11-20 09:31:36,670 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 17650 transitions. [2022-11-20 09:31:36,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 17650 transitions. [2022-11-20 09:31:36,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:36,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 17650 transitions. [2022-11-20 09:31:36,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 840.4761904761905) internal successors, (17650), 21 states have internal predecessors, (17650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,694 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1060.0) internal successors, (23320), 22 states have internal predecessors, (23320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,694 INFO L175 Difference]: Start difference. First operand has 939 places, 871 transitions, 1938 flow. Second operand 21 states and 17650 transitions. [2022-11-20 09:31:36,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 895 transitions, 2184 flow [2022-11-20 09:31:36,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 958 places, 895 transitions, 2170 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:31:36,703 INFO L231 Difference]: Finished difference. Result has 963 places, 884 transitions, 2062 flow [2022-11-20 09:31:36,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=860, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2062, PETRI_PLACES=963, PETRI_TRANSITIONS=884} [2022-11-20 09:31:36,704 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, 26 predicate places. [2022-11-20 09:31:36,704 INFO L495 AbstractCegarLoop]: Abstraction has has 963 places, 884 transitions, 2062 flow [2022-11-20 09:31:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 839.6111111111111) internal successors, (15113), 18 states have internal predecessors, (15113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:36,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:36,706 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:36,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:36,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:36,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:36,907 INFO L85 PathProgramCache]: Analyzing trace with hash 280181955, now seen corresponding path program 1 times [2022-11-20 09:31:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:36,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433724599] [2022-11-20 09:31:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:36,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:37,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433724599] [2022-11-20 09:31:37,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433724599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:37,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154785325] [2022-11-20 09:31:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:37,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:37,092 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-11-20 09:31:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:38,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:38,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154785325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:38,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:38,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:31:38,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643338527] [2022-11-20 09:31:38,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:38,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:31:38,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:31:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:31:38,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-11-20 09:31:38,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 963 places, 884 transitions, 2062 flow. Second operand has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:38,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:38,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-11-20 09:31:38,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:40,081 INFO L130 PetriNetUnfolder]: 0/1294 cut-off events. [2022-11-20 09:31:40,082 INFO L131 PetriNetUnfolder]: For 681/681 co-relation queries the response was YES. [2022-11-20 09:31:40,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2090 conditions, 1294 events. 0/1294 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3982 event pairs, 0 based on Foata normal form. 8/1302 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2022-11-20 09:31:40,084 INFO L137 encePairwiseOnDemand]: 1054/1060 looper letters, 64 selfloop transitions, 45 changer transitions 0/935 dead transitions. [2022-11-20 09:31:40,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1007 places, 935 transitions, 2596 flow [2022-11-20 09:31:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:31:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:31:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 37782 transitions. [2022-11-20 09:31:40,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7920754716981132 [2022-11-20 09:31:40,103 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 37782 transitions. [2022-11-20 09:31:40,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 37782 transitions. [2022-11-20 09:31:40,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:40,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 37782 transitions. [2022-11-20 09:31:40,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 839.6) internal successors, (37782), 45 states have internal predecessors, (37782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:40,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:40,155 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1060.0) internal successors, (48760), 46 states have internal predecessors, (48760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:40,155 INFO L175 Difference]: Start difference. First operand has 963 places, 884 transitions, 2062 flow. Second operand 45 states and 37782 transitions. [2022-11-20 09:31:40,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1007 places, 935 transitions, 2596 flow [2022-11-20 09:31:40,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1001 places, 935 transitions, 2556 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:31:40,168 INFO L231 Difference]: Finished difference. Result has 1010 places, 909 transitions, 2340 flow [2022-11-20 09:31:40,168 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=861, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2340, PETRI_PLACES=1010, PETRI_TRANSITIONS=909} [2022-11-20 09:31:40,168 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, 73 predicate places. [2022-11-20 09:31:40,169 INFO L495 AbstractCegarLoop]: Abstraction has has 1010 places, 909 transitions, 2340 flow [2022-11-20 09:31:40,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 839.7941176470588) internal successors, (28553), 34 states have internal predecessors, (28553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:40,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:40,172 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:40,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-11-20 09:31:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:40,372 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1399032503, now seen corresponding path program 1 times [2022-11-20 09:31:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:40,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69992426] [2022-11-20 09:31:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:40,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:40,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69992426] [2022-11-20 09:31:40,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69992426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:40,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688701679] [2022-11-20 09:31:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:40,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:40,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:40,952 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:40,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-20 09:31:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:42,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:31:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:42,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:43,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688701679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:43,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:43,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:31:43,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018862696] [2022-11-20 09:31:43,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:43,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:31:43,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:43,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:31:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:31:43,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 837 out of 1060 [2022-11-20 09:31:43,239 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1010 places, 909 transitions, 2340 flow. Second operand has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:43,239 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:43,239 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 837 of 1060 [2022-11-20 09:31:43,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:46,092 INFO L130 PetriNetUnfolder]: 0/1118 cut-off events. [2022-11-20 09:31:46,092 INFO L131 PetriNetUnfolder]: For 2103/2103 co-relation queries the response was YES. [2022-11-20 09:31:46,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 1118 events. 0/1118 cut-off events. For 2103/2103 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 2835 event pairs, 0 based on Foata normal form. 16/1134 useless extension candidates. Maximal degree in co-relation 0. Up to 56 conditions per place. [2022-11-20 09:31:46,093 INFO L137 encePairwiseOnDemand]: 1055/1060 looper letters, 93 selfloop transitions, 91 changer transitions 0/1000 dead transitions. [2022-11-20 09:31:46,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 1000 transitions, 3462 flow [2022-11-20 09:31:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:31:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:31:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 78041 transitions. [2022-11-20 09:31:46,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916514505984987 [2022-11-20 09:31:46,129 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 78041 transitions. [2022-11-20 09:31:46,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 78041 transitions. [2022-11-20 09:31:46,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:46,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 78041 transitions. [2022-11-20 09:31:46,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 839.1505376344086) internal successors, (78041), 93 states have internal predecessors, (78041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,236 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1060.0) internal successors, (99640), 94 states have internal predecessors, (99640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,237 INFO L175 Difference]: Start difference. First operand has 1010 places, 909 transitions, 2340 flow. Second operand 93 states and 78041 transitions. [2022-11-20 09:31:46,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 1000 transitions, 3462 flow [2022-11-20 09:31:46,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1058 places, 1000 transitions, 3213 flow, removed 25 selfloop flow, removed 33 redundant places. [2022-11-20 09:31:46,251 INFO L231 Difference]: Finished difference. Result has 1058 places, 943 transitions, 2703 flow [2022-11-20 09:31:46,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1060, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=966, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=852, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=2703, PETRI_PLACES=1058, PETRI_TRANSITIONS=943} [2022-11-20 09:31:46,251 INFO L288 CegarLoopForPetriNet]: 937 programPoint places, 121 predicate places. [2022-11-20 09:31:46,251 INFO L495 AbstractCegarLoop]: Abstraction has has 1058 places, 943 transitions, 2703 flow [2022-11-20 09:31:46,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 839.8939393939394) internal successors, (55433), 66 states have internal predecessors, (55433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:46,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:46,257 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:46,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-11-20 09:31:46,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:46,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1478585189, now seen corresponding path program 1 times [2022-11-20 09:31:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523940822] [2022-11-20 09:31:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:46,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:31:46,504 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:31:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:31:46,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:31:46,586 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:31:46,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:31:46,587 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:31:46,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2022-11-20 09:31:46,587 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:46,587 WARN L233 ceAbstractionStarter]: 30 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:31:46,587 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 31 thread instances. [2022-11-20 09:31:46,672 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:31:46,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 966 places, 1093 transitions, 3271 flow [2022-11-20 09:31:47,811 INFO L130 PetriNetUnfolder]: 314/2204 cut-off events. [2022-11-20 09:31:47,812 INFO L131 PetriNetUnfolder]: For 5425/5425 co-relation queries the response was YES. [2022-11-20 09:31:47,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 2204 events. 314/2204 cut-off events. For 5425/5425 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8047 event pairs, 0 based on Foata normal form. 0/1826 useless extension candidates. Maximal degree in co-relation 2663. Up to 64 conditions per place. [2022-11-20 09:31:47,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 966 places, 1093 transitions, 3271 flow [2022-11-20 09:31:48,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 966 places, 1093 transitions, 3271 flow [2022-11-20 09:31:48,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:31:48,025 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:31:48,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:31:48,031 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:31:48,031 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:31:48,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:48,031 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] [2022-11-20 09:31:48,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1855002785, now seen corresponding path program 1 times [2022-11-20 09:31:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:48,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335500380] [2022-11-20 09:31:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:48,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:48,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335500380] [2022-11-20 09:31:48,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335500380] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:48,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:48,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:31:48,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797446529] [2022-11-20 09:31:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:48,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:31:48,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:31:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:31:48,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 871 out of 1093 [2022-11-20 09:31:48,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 1093 transitions, 3271 flow. Second operand has 2 states, 2 states have (on average 871.5) internal successors, (1743), 2 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:48,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:48,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 871 of 1093 [2022-11-20 09:31:48,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:49,317 INFO L130 PetriNetUnfolder]: 0/1858 cut-off events. [2022-11-20 09:31:49,317 INFO L131 PetriNetUnfolder]: For 5921/5921 co-relation queries the response was YES. [2022-11-20 09:31:49,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 1858 events. 0/1858 cut-off events. For 5921/5921 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7569 event pairs, 0 based on Foata normal form. 2926/4720 useless extension candidates. Maximal degree in co-relation 0. Up to 32 conditions per place. [2022-11-20 09:31:49,321 INFO L137 encePairwiseOnDemand]: 903/1093 looper letters, 31 selfloop transitions, 0 changer transitions 11/902 dead transitions. [2022-11-20 09:31:49,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 902 transitions, 2951 flow [2022-11-20 09:31:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:31:49,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:31:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1963 transitions. [2022-11-20 09:31:49,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8979871912168343 [2022-11-20 09:31:49,323 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1963 transitions. [2022-11-20 09:31:49,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1963 transitions. [2022-11-20 09:31:49,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:49,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1963 transitions. [2022-11-20 09:31:49,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 981.5) internal successors, (1963), 2 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1093.0) internal successors, (3279), 3 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,327 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1093.0) internal successors, (3279), 3 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,327 INFO L175 Difference]: Start difference. First operand has 966 places, 1093 transitions, 3271 flow. Second operand 2 states and 1963 transitions. [2022-11-20 09:31:49,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 902 transitions, 2951 flow [2022-11-20 09:31:49,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 902 transitions, 2021 flow, removed 465 selfloop flow, removed 0 redundant places. [2022-11-20 09:31:49,345 INFO L231 Difference]: Finished difference. Result has 966 places, 891 transitions, 1937 flow [2022-11-20 09:31:49,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=902, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=902, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1937, PETRI_PLACES=966, PETRI_TRANSITIONS=891} [2022-11-20 09:31:49,347 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 0 predicate places. [2022-11-20 09:31:49,347 INFO L495 AbstractCegarLoop]: Abstraction has has 966 places, 891 transitions, 1937 flow [2022-11-20 09:31:49,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 871.5) internal successors, (1743), 2 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:49,348 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] [2022-11-20 09:31:49,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2022-11-20 09:31:49,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:49,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:49,348 INFO L85 PathProgramCache]: Analyzing trace with hash 58051426, now seen corresponding path program 1 times [2022-11-20 09:31:49,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:49,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008045000] [2022-11-20 09:31:49,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:49,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:49,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:49,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008045000] [2022-11-20 09:31:49,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008045000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:31:49,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:31:49,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:31:49,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645343600] [2022-11-20 09:31:49,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:31:49,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:31:49,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:49,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:31:49,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:31:49,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 864 out of 1093 [2022-11-20 09:31:49,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 966 places, 891 transitions, 1937 flow. Second operand has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:49,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:49,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 864 of 1093 [2022-11-20 09:31:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:50,412 INFO L130 PetriNetUnfolder]: 0/1495 cut-off events. [2022-11-20 09:31:50,413 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 09:31:50,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1812 conditions, 1495 events. 0/1495 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5158 event pairs, 0 based on Foata normal form. 0/1464 useless extension candidates. Maximal degree in co-relation 0. Up to 186 conditions per place. [2022-11-20 09:31:50,416 INFO L137 encePairwiseOnDemand]: 1090/1093 looper letters, 40 selfloop transitions, 2 changer transitions 0/895 dead transitions. [2022-11-20 09:31:50,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 957 places, 895 transitions, 2029 flow [2022-11-20 09:31:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:31:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:31:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2635 transitions. [2022-11-20 09:31:50,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8035986581274779 [2022-11-20 09:31:50,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2635 transitions. [2022-11-20 09:31:50,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2635 transitions. [2022-11-20 09:31:50,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:50,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2635 transitions. [2022-11-20 09:31:50,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 878.3333333333334) internal successors, (2635), 3 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:50,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:50,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1093.0) internal successors, (4372), 4 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:50,422 INFO L175 Difference]: Start difference. First operand has 966 places, 891 transitions, 1937 flow. Second operand 3 states and 2635 transitions. [2022-11-20 09:31:50,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 957 places, 895 transitions, 2029 flow [2022-11-20 09:31:50,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 957 places, 895 transitions, 2029 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:31:50,431 INFO L231 Difference]: Finished difference. Result has 958 places, 892 transitions, 1949 flow [2022-11-20 09:31:50,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=955, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1949, PETRI_PLACES=958, PETRI_TRANSITIONS=892} [2022-11-20 09:31:50,431 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, -8 predicate places. [2022-11-20 09:31:50,431 INFO L495 AbstractCegarLoop]: Abstraction has has 958 places, 892 transitions, 1949 flow [2022-11-20 09:31:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 865.0) internal successors, (2595), 3 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:50,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:50,432 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] [2022-11-20 09:31:50,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2022-11-20 09:31:50,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash -859713674, now seen corresponding path program 1 times [2022-11-20 09:31:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490633464] [2022-11-20 09:31:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:50,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490633464] [2022-11-20 09:31:50,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490633464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:50,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811862224] [2022-11-20 09:31:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:50,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:50,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:50,472 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:50,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-20 09:31:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:31:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:51,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:51,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811862224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:51,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:51,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:31:51,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954211400] [2022-11-20 09:31:51,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:51,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:31:51,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:51,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:31:51,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:31:51,546 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-20 09:31:51,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 958 places, 892 transitions, 1949 flow. Second operand has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:51,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:51,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-20 09:31:51,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:52,727 INFO L130 PetriNetUnfolder]: 0/1473 cut-off events. [2022-11-20 09:31:52,727 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-20 09:31:52,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 1473 events. 0/1473 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5031 event pairs, 0 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-20 09:31:52,729 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 41 selfloop transitions, 9 changer transitions 0/902 dead transitions. [2022-11-20 09:31:52,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 902 transitions, 2071 flow [2022-11-20 09:31:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:31:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:31:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 7819 transitions. [2022-11-20 09:31:52,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7948561553319101 [2022-11-20 09:31:52,735 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 7819 transitions. [2022-11-20 09:31:52,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 7819 transitions. [2022-11-20 09:31:52,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:52,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 7819 transitions. [2022-11-20 09:31:52,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 868.7777777777778) internal successors, (7819), 9 states have internal predecessors, (7819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,746 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1093.0) internal successors, (10930), 10 states have internal predecessors, (10930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,746 INFO L175 Difference]: Start difference. First operand has 958 places, 892 transitions, 1949 flow. Second operand 9 states and 7819 transitions. [2022-11-20 09:31:52,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 902 transitions, 2071 flow [2022-11-20 09:31:52,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 965 places, 902 transitions, 2069 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:31:52,754 INFO L231 Difference]: Finished difference. Result has 968 places, 898 transitions, 1997 flow [2022-11-20 09:31:52,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=957, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=968, PETRI_TRANSITIONS=898} [2022-11-20 09:31:52,754 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 2 predicate places. [2022-11-20 09:31:52,754 INFO L495 AbstractCegarLoop]: Abstraction has has 968 places, 898 transitions, 1997 flow [2022-11-20 09:31:52,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 865.3) internal successors, (8653), 10 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:52,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:52,755 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:52,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-11-20 09:31:52,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash 24168801, now seen corresponding path program 1 times [2022-11-20 09:31:52,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:52,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660445896] [2022-11-20 09:31:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:52,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660445896] [2022-11-20 09:31:53,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660445896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086001440] [2022-11-20 09:31:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:53,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:53,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:53,031 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:53,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-20 09:31:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:54,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:31:54,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:54,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:54,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086001440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:54,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:54,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:31:54,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448020155] [2022-11-20 09:31:54,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:31:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:31:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:31:54,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-20 09:31:54,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 968 places, 898 transitions, 1997 flow. Second operand has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:54,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:54,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-20 09:31:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:55,565 INFO L130 PetriNetUnfolder]: 0/1429 cut-off events. [2022-11-20 09:31:55,565 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-11-20 09:31:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2068 conditions, 1429 events. 0/1429 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4736 event pairs, 0 based on Foata normal form. 4/1433 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-20 09:31:55,569 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 49 selfloop transitions, 21 changer transitions 0/922 dead transitions. [2022-11-20 09:31:55,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 988 places, 922 transitions, 2245 flow [2022-11-20 09:31:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:31:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:31:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18197 transitions. [2022-11-20 09:31:55,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7927939702871084 [2022-11-20 09:31:55,581 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18197 transitions. [2022-11-20 09:31:55,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18197 transitions. [2022-11-20 09:31:55,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:55,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18197 transitions. [2022-11-20 09:31:55,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 866.5238095238095) internal successors, (18197), 21 states have internal predecessors, (18197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,609 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1093.0) internal successors, (24046), 22 states have internal predecessors, (24046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,609 INFO L175 Difference]: Start difference. First operand has 968 places, 898 transitions, 1997 flow. Second operand 21 states and 18197 transitions. [2022-11-20 09:31:55,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 988 places, 922 transitions, 2245 flow [2022-11-20 09:31:55,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 987 places, 922 transitions, 2231 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:31:55,620 INFO L231 Difference]: Finished difference. Result has 992 places, 911 transitions, 2121 flow [2022-11-20 09:31:55,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=967, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=898, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2121, PETRI_PLACES=992, PETRI_TRANSITIONS=911} [2022-11-20 09:31:55,621 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 26 predicate places. [2022-11-20 09:31:55,621 INFO L495 AbstractCegarLoop]: Abstraction has has 992 places, 911 transitions, 2121 flow [2022-11-20 09:31:55,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 865.6111111111111) internal successors, (15581), 18 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:55,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:55,623 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:55,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-20 09:31:55,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:55,824 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash -200556221, now seen corresponding path program 1 times [2022-11-20 09:31:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:55,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865002519] [2022-11-20 09:31:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:55,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:56,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:31:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865002519] [2022-11-20 09:31:56,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865002519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:31:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347770200] [2022-11-20 09:31:56,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:56,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:31:56,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:31:56,024 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:31:56,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-20 09:31:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:31:57,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:31:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:31:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:57,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:31:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:31:57,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347770200] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:31:57,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:31:57,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:31:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346469866] [2022-11-20 09:31:57,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:31:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:31:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:31:57,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:31:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:31:57,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-20 09:31:57,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 992 places, 911 transitions, 2121 flow. Second operand has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:57,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:31:57,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-20 09:31:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:31:59,306 INFO L130 PetriNetUnfolder]: 0/1341 cut-off events. [2022-11-20 09:31:59,306 INFO L131 PetriNetUnfolder]: For 708/708 co-relation queries the response was YES. [2022-11-20 09:31:59,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1341 events. 0/1341 cut-off events. For 708/708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4155 event pairs, 0 based on Foata normal form. 8/1349 useless extension candidates. Maximal degree in co-relation 0. Up to 71 conditions per place. [2022-11-20 09:31:59,309 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 65 selfloop transitions, 45 changer transitions 0/962 dead transitions. [2022-11-20 09:31:59,309 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1036 places, 962 transitions, 2657 flow [2022-11-20 09:31:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:31:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:31:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 38953 transitions. [2022-11-20 09:31:59,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7919690962691878 [2022-11-20 09:31:59,499 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 38953 transitions. [2022-11-20 09:31:59,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 38953 transitions. [2022-11-20 09:31:59,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:31:59,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 38953 transitions. [2022-11-20 09:31:59,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 865.6222222222223) internal successors, (38953), 45 states have internal predecessors, (38953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,588 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1093.0) internal successors, (50278), 46 states have internal predecessors, (50278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,588 INFO L175 Difference]: Start difference. First operand has 992 places, 911 transitions, 2121 flow. Second operand 45 states and 38953 transitions. [2022-11-20 09:31:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1036 places, 962 transitions, 2657 flow [2022-11-20 09:31:59,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1030 places, 962 transitions, 2617 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:31:59,605 INFO L231 Difference]: Finished difference. Result has 1039 places, 936 transitions, 2399 flow [2022-11-20 09:31:59,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2097, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=911, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=888, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2399, PETRI_PLACES=1039, PETRI_TRANSITIONS=936} [2022-11-20 09:31:59,606 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 73 predicate places. [2022-11-20 09:31:59,606 INFO L495 AbstractCegarLoop]: Abstraction has has 1039 places, 936 transitions, 2399 flow [2022-11-20 09:31:59,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 865.7941176470588) internal successors, (29437), 34 states have internal predecessors, (29437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:31:59,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:31:59,610 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:31:59,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-11-20 09:31:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-11-20 09:31:59,820 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:31:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:31:59,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1160763081, now seen corresponding path program 1 times [2022-11-20 09:31:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:31:59,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573625228] [2022-11-20 09:31:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:31:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:31:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:00,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:00,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573625228] [2022-11-20 09:32:00,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573625228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310614334] [2022-11-20 09:32:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:00,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:00,403 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:00,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-20 09:32:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:32:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:01,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:02,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310614334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:02,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:02,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:32:02,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109185049] [2022-11-20 09:32:02,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:02,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:32:02,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:32:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:32:02,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 863 out of 1093 [2022-11-20 09:32:02,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 936 transitions, 2399 flow. Second operand has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:02,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:02,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 863 of 1093 [2022-11-20 09:32:02,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:05,790 INFO L130 PetriNetUnfolder]: 0/1165 cut-off events. [2022-11-20 09:32:05,790 INFO L131 PetriNetUnfolder]: For 2224/2224 co-relation queries the response was YES. [2022-11-20 09:32:05,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2005 conditions, 1165 events. 0/1165 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 2986 event pairs, 0 based on Foata normal form. 16/1181 useless extension candidates. Maximal degree in co-relation 0. Up to 58 conditions per place. [2022-11-20 09:32:05,793 INFO L137 encePairwiseOnDemand]: 1087/1093 looper letters, 97 selfloop transitions, 93 changer transitions 0/1042 dead transitions. [2022-11-20 09:32:05,793 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 1042 transitions, 3627 flow [2022-11-20 09:32:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:32:05,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:32:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 80465 transitions. [2022-11-20 09:32:05,828 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791596572519159 [2022-11-20 09:32:05,828 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 80465 transitions. [2022-11-20 09:32:05,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 80465 transitions. [2022-11-20 09:32:05,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:05,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 80465 transitions. [2022-11-20 09:32:05,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 865.2150537634409) internal successors, (80465), 93 states have internal predecessors, (80465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:05,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:05,944 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1093.0) internal successors, (102742), 94 states have internal predecessors, (102742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:05,944 INFO L175 Difference]: Start difference. First operand has 1039 places, 936 transitions, 2399 flow. Second operand 93 states and 80465 transitions. [2022-11-20 09:32:05,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 1042 transitions, 3627 flow [2022-11-20 09:32:05,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1113 places, 1042 transitions, 3539 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:32:05,964 INFO L231 Difference]: Finished difference. Result has 1130 places, 985 transitions, 3033 flow [2022-11-20 09:32:05,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1093, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=1021, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3033, PETRI_PLACES=1130, PETRI_TRANSITIONS=985} [2022-11-20 09:32:05,964 INFO L288 CegarLoopForPetriNet]: 966 programPoint places, 164 predicate places. [2022-11-20 09:32:05,964 INFO L495 AbstractCegarLoop]: Abstraction has has 1130 places, 985 transitions, 3033 flow [2022-11-20 09:32:05,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 865.8939393939394) internal successors, (57149), 66 states have internal predecessors, (57149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:05,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:05,971 INFO L209 CegarLoopForPetriNet]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:05,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-20 09:32:06,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-11-20 09:32:06,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash 440356055, now seen corresponding path program 1 times [2022-11-20 09:32:06,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:06,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302053952] [2022-11-20 09:32:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:06,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:32:06,219 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:32:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:32:06,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:32:06,298 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:32:06,298 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:32:06,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:32:06,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2022-11-20 09:32:06,298 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:06,299 WARN L233 ceAbstractionStarter]: 31 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:32:06,299 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 32 thread instances. [2022-11-20 09:32:06,382 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:32:06,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 995 places, 1126 transitions, 3404 flow [2022-11-20 09:32:07,536 INFO L130 PetriNetUnfolder]: 324/2273 cut-off events. [2022-11-20 09:32:07,536 INFO L131 PetriNetUnfolder]: For 5952/5952 co-relation queries the response was YES. [2022-11-20 09:32:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2898 conditions, 2273 events. 324/2273 cut-off events. For 5952/5952 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8304 event pairs, 0 based on Foata normal form. 0/1883 useless extension candidates. Maximal degree in co-relation 2766. Up to 66 conditions per place. [2022-11-20 09:32:07,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 995 places, 1126 transitions, 3404 flow [2022-11-20 09:32:07,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 995 places, 1126 transitions, 3404 flow [2022-11-20 09:32:07,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:32:07,740 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:32:07,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:32:07,744 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:32:07,744 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:32:07,745 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:07,745 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] [2022-11-20 09:32:07,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:07,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:07,745 INFO L85 PathProgramCache]: Analyzing trace with hash -418258655, now seen corresponding path program 1 times [2022-11-20 09:32:07,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:07,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381697946] [2022-11-20 09:32:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:07,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:07,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381697946] [2022-11-20 09:32:07,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381697946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:07,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:07,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:32:07,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070512891] [2022-11-20 09:32:07,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:32:07,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:32:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:32:07,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 897 out of 1126 [2022-11-20 09:32:07,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 1126 transitions, 3404 flow. Second operand has 2 states, 2 states have (on average 897.5) internal successors, (1795), 2 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:07,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:07,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 897 of 1126 [2022-11-20 09:32:07,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:08,964 INFO L130 PetriNetUnfolder]: 0/1916 cut-off events. [2022-11-20 09:32:08,964 INFO L131 PetriNetUnfolder]: For 6480/6480 co-relation queries the response was YES. [2022-11-20 09:32:08,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2574 conditions, 1916 events. 0/1916 cut-off events. For 6480/6480 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 7816 event pairs, 0 based on Foata normal form. 3116/4966 useless extension candidates. Maximal degree in co-relation 0. Up to 33 conditions per place. [2022-11-20 09:32:08,968 INFO L137 encePairwiseOnDemand]: 930/1126 looper letters, 32 selfloop transitions, 0 changer transitions 11/929 dead transitions. [2022-11-20 09:32:08,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 929 transitions, 3074 flow [2022-11-20 09:32:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:32:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:32:08,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2022 transitions. [2022-11-20 09:32:08,970 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978685612788633 [2022-11-20 09:32:08,970 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2022 transitions. [2022-11-20 09:32:08,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2022 transitions. [2022-11-20 09:32:08,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:08,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2022 transitions. [2022-11-20 09:32:08,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1011.0) internal successors, (2022), 2 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1126.0) internal successors, (3378), 3 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,973 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1126.0) internal successors, (3378), 3 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,973 INFO L175 Difference]: Start difference. First operand has 995 places, 1126 transitions, 3404 flow. Second operand 2 states and 2022 transitions. [2022-11-20 09:32:08,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 929 transitions, 3074 flow [2022-11-20 09:32:08,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 995 places, 929 transitions, 2082 flow, removed 496 selfloop flow, removed 0 redundant places. [2022-11-20 09:32:08,991 INFO L231 Difference]: Finished difference. Result has 995 places, 918 transitions, 1996 flow [2022-11-20 09:32:08,991 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=994, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1996, PETRI_PLACES=995, PETRI_TRANSITIONS=918} [2022-11-20 09:32:08,992 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 0 predicate places. [2022-11-20 09:32:08,992 INFO L495 AbstractCegarLoop]: Abstraction has has 995 places, 918 transitions, 1996 flow [2022-11-20 09:32:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 897.5) internal successors, (1795), 2 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:08,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:08,992 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] [2022-11-20 09:32:08,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2022-11-20 09:32:08,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:08,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2079757282, now seen corresponding path program 1 times [2022-11-20 09:32:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:08,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727208260] [2022-11-20 09:32:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:08,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:09,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:09,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727208260] [2022-11-20 09:32:09,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727208260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:09,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:09,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:32:09,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059584352] [2022-11-20 09:32:09,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:09,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:09,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:09,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:32:09,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 890 out of 1126 [2022-11-20 09:32:09,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 995 places, 918 transitions, 1996 flow. Second operand has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:09,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:09,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 890 of 1126 [2022-11-20 09:32:09,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:10,158 INFO L130 PetriNetUnfolder]: 0/1542 cut-off events. [2022-11-20 09:32:10,158 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-20 09:32:10,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 1542 events. 0/1542 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5332 event pairs, 0 based on Foata normal form. 0/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 192 conditions per place. [2022-11-20 09:32:10,160 INFO L137 encePairwiseOnDemand]: 1123/1126 looper letters, 41 selfloop transitions, 2 changer transitions 0/922 dead transitions. [2022-11-20 09:32:10,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 922 transitions, 2090 flow [2022-11-20 09:32:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:32:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2714 transitions. [2022-11-20 09:32:10,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8034339846062759 [2022-11-20 09:32:10,162 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2714 transitions. [2022-11-20 09:32:10,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2714 transitions. [2022-11-20 09:32:10,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:10,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2714 transitions. [2022-11-20 09:32:10,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 904.6666666666666) internal successors, (2714), 3 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1126.0) internal successors, (4504), 4 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,166 INFO L175 Difference]: Start difference. First operand has 995 places, 918 transitions, 1996 flow. Second operand 3 states and 2714 transitions. [2022-11-20 09:32:10,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 922 transitions, 2090 flow [2022-11-20 09:32:10,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 986 places, 922 transitions, 2090 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:32:10,173 INFO L231 Difference]: Finished difference. Result has 987 places, 919 transitions, 2008 flow [2022-11-20 09:32:10,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=1996, PETRI_DIFFERENCE_MINUEND_PLACES=984, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2008, PETRI_PLACES=987, PETRI_TRANSITIONS=919} [2022-11-20 09:32:10,174 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, -8 predicate places. [2022-11-20 09:32:10,174 INFO L495 AbstractCegarLoop]: Abstraction has has 987 places, 919 transitions, 2008 flow [2022-11-20 09:32:10,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 891.0) internal successors, (2673), 3 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:10,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:10,174 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] [2022-11-20 09:32:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2022-11-20 09:32:10,175 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash -820602922, now seen corresponding path program 1 times [2022-11-20 09:32:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685873666] [2022-11-20 09:32:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:10,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:10,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685873666] [2022-11-20 09:32:10,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685873666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199780562] [2022-11-20 09:32:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:10,215 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:10,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-20 09:32:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:32:11,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:11,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:11,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199780562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:11,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:11,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:32:11,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581455837] [2022-11-20 09:32:11,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:11,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:11,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:11,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-20 09:32:11,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 987 places, 919 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:11,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:11,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-20 09:32:11,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:12,544 INFO L130 PetriNetUnfolder]: 0/1520 cut-off events. [2022-11-20 09:32:12,544 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-20 09:32:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1943 conditions, 1520 events. 0/1520 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5172 event pairs, 0 based on Foata normal form. 2/1522 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-20 09:32:12,547 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 42 selfloop transitions, 9 changer transitions 0/929 dead transitions. [2022-11-20 09:32:12,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 995 places, 929 transitions, 2132 flow [2022-11-20 09:32:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:32:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8054 transitions. [2022-11-20 09:32:12,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7947503453720149 [2022-11-20 09:32:12,553 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8054 transitions. [2022-11-20 09:32:12,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8054 transitions. [2022-11-20 09:32:12,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:12,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8054 transitions. [2022-11-20 09:32:12,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 894.8888888888889) internal successors, (8054), 9 states have internal predecessors, (8054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:12,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:12,563 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1126.0) internal successors, (11260), 10 states have internal predecessors, (11260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:12,564 INFO L175 Difference]: Start difference. First operand has 987 places, 919 transitions, 2008 flow. Second operand 9 states and 8054 transitions. [2022-11-20 09:32:12,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 995 places, 929 transitions, 2132 flow [2022-11-20 09:32:12,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 994 places, 929 transitions, 2130 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:32:12,572 INFO L231 Difference]: Finished difference. Result has 997 places, 925 transitions, 2056 flow [2022-11-20 09:32:12,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=986, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=997, PETRI_TRANSITIONS=925} [2022-11-20 09:32:12,573 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 2 predicate places. [2022-11-20 09:32:12,573 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 925 transitions, 2056 flow [2022-11-20 09:32:12,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 891.3) internal successors, (8913), 10 states have internal predecessors, (8913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:12,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:12,574 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:12,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:12,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:12,775 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:12,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2092468609, now seen corresponding path program 1 times [2022-11-20 09:32:12,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:12,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182536552] [2022-11-20 09:32:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:12,850 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:12,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182536552] [2022-11-20 09:32:12,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182536552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:12,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408802556] [2022-11-20 09:32:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:12,851 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:12,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-20 09:32:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:13,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:32:13,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:13,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408802556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:14,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:14,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:32:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504810853] [2022-11-20 09:32:14,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:14,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:32:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:14,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:32:14,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:32:14,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-20 09:32:14,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 925 transitions, 2056 flow. Second operand has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:14,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:14,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-20 09:32:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:15,373 INFO L130 PetriNetUnfolder]: 0/1476 cut-off events. [2022-11-20 09:32:15,374 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-20 09:32:15,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2136 conditions, 1476 events. 0/1476 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4910 event pairs, 0 based on Foata normal form. 4/1480 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-20 09:32:15,377 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 50 selfloop transitions, 21 changer transitions 0/949 dead transitions. [2022-11-20 09:32:15,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1017 places, 949 transitions, 2306 flow [2022-11-20 09:32:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:32:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:32:15,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 18744 transitions. [2022-11-20 09:32:15,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7926922100989596 [2022-11-20 09:32:15,387 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 18744 transitions. [2022-11-20 09:32:15,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 18744 transitions. [2022-11-20 09:32:15,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:15,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 18744 transitions. [2022-11-20 09:32:15,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 892.5714285714286) internal successors, (18744), 21 states have internal predecessors, (18744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,413 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1126.0) internal successors, (24772), 22 states have internal predecessors, (24772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,413 INFO L175 Difference]: Start difference. First operand has 997 places, 925 transitions, 2056 flow. Second operand 21 states and 18744 transitions. [2022-11-20 09:32:15,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1017 places, 949 transitions, 2306 flow [2022-11-20 09:32:15,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1016 places, 949 transitions, 2292 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:32:15,425 INFO L231 Difference]: Finished difference. Result has 1021 places, 938 transitions, 2180 flow [2022-11-20 09:32:15,426 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=996, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2180, PETRI_PLACES=1021, PETRI_TRANSITIONS=938} [2022-11-20 09:32:15,426 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 26 predicate places. [2022-11-20 09:32:15,427 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 938 transitions, 2180 flow [2022-11-20 09:32:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 891.6111111111111) internal successors, (16049), 18 states have internal predecessors, (16049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:15,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:15,430 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:15,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-11-20 09:32:15,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-11-20 09:32:15,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash 594366691, now seen corresponding path program 1 times [2022-11-20 09:32:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:15,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595641322] [2022-11-20 09:32:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:15,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:15,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595641322] [2022-11-20 09:32:15,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595641322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338604258] [2022-11-20 09:32:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:15,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:15,825 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:15,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-20 09:32:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:32:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:17,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338604258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:17,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:17,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:32:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47252886] [2022-11-20 09:32:17,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:32:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:32:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:32:17,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-20 09:32:17,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1021 places, 938 transitions, 2180 flow. Second operand has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:17,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:17,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-20 09:32:17,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:19,063 INFO L130 PetriNetUnfolder]: 0/1388 cut-off events. [2022-11-20 09:32:19,063 INFO L131 PetriNetUnfolder]: For 735/735 co-relation queries the response was YES. [2022-11-20 09:32:19,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1388 events. 0/1388 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4308 event pairs, 0 based on Foata normal form. 8/1396 useless extension candidates. Maximal degree in co-relation 0. Up to 75 conditions per place. [2022-11-20 09:32:19,066 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 66 selfloop transitions, 45 changer transitions 0/989 dead transitions. [2022-11-20 09:32:19,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1065 places, 989 transitions, 2718 flow [2022-11-20 09:32:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:32:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:32:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 40124 transitions. [2022-11-20 09:32:19,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7918689559897375 [2022-11-20 09:32:19,086 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 40124 transitions. [2022-11-20 09:32:19,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 40124 transitions. [2022-11-20 09:32:19,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:19,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 40124 transitions. [2022-11-20 09:32:19,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 891.6444444444444) internal successors, (40124), 45 states have internal predecessors, (40124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:19,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:19,142 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1126.0) internal successors, (51796), 46 states have internal predecessors, (51796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:19,142 INFO L175 Difference]: Start difference. First operand has 1021 places, 938 transitions, 2180 flow. Second operand 45 states and 40124 transitions. [2022-11-20 09:32:19,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1065 places, 989 transitions, 2718 flow [2022-11-20 09:32:19,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1059 places, 989 transitions, 2678 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:32:19,155 INFO L231 Difference]: Finished difference. Result has 1068 places, 963 transitions, 2458 flow [2022-11-20 09:32:19,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2156, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=915, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2458, PETRI_PLACES=1068, PETRI_TRANSITIONS=963} [2022-11-20 09:32:19,156 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 73 predicate places. [2022-11-20 09:32:19,156 INFO L495 AbstractCegarLoop]: Abstraction has has 1068 places, 963 transitions, 2458 flow [2022-11-20 09:32:19,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 891.7941176470588) internal successors, (30321), 34 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:19,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:19,159 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:19,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-20 09:32:19,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:19,360 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:19,360 INFO L85 PathProgramCache]: Analyzing trace with hash 393533399, now seen corresponding path program 1 times [2022-11-20 09:32:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457493171] [2022-11-20 09:32:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:19,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457493171] [2022-11-20 09:32:19,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457493171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:19,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193567438] [2022-11-20 09:32:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:19,950 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:19,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 09:32:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:32:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:21,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:22,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193567438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:22,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:22,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:32:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639085183] [2022-11-20 09:32:22,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:22,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:32:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:32:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:32:22,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-20 09:32:22,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1068 places, 963 transitions, 2458 flow. Second operand has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:22,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:22,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-20 09:32:22,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:25,446 INFO L130 PetriNetUnfolder]: 0/1212 cut-off events. [2022-11-20 09:32:25,446 INFO L131 PetriNetUnfolder]: For 2345/2345 co-relation queries the response was YES. [2022-11-20 09:32:25,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2095 conditions, 1212 events. 0/1212 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3158 event pairs, 0 based on Foata normal form. 16/1228 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 09:32:25,447 INFO L137 encePairwiseOnDemand]: 1120/1126 looper letters, 98 selfloop transitions, 93 changer transitions 0/1069 dead transitions. [2022-11-20 09:32:25,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 1069 transitions, 3688 flow [2022-11-20 09:32:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:32:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:32:25,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 82884 transitions. [2022-11-20 09:32:25,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914971638113791 [2022-11-20 09:32:25,482 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 82884 transitions. [2022-11-20 09:32:25,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 82884 transitions. [2022-11-20 09:32:25,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:25,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 82884 transitions. [2022-11-20 09:32:25,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 891.2258064516129) internal successors, (82884), 93 states have internal predecessors, (82884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,600 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1126.0) internal successors, (105844), 94 states have internal predecessors, (105844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,600 INFO L175 Difference]: Start difference. First operand has 1068 places, 963 transitions, 2458 flow. Second operand 93 states and 82884 transitions. [2022-11-20 09:32:25,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 1069 transitions, 3688 flow [2022-11-20 09:32:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1142 places, 1069 transitions, 3600 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:32:25,616 INFO L231 Difference]: Finished difference. Result has 1159 places, 1012 transitions, 3092 flow [2022-11-20 09:32:25,617 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=1050, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=916, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3092, PETRI_PLACES=1159, PETRI_TRANSITIONS=1012} [2022-11-20 09:32:25,617 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 164 predicate places. [2022-11-20 09:32:25,617 INFO L495 AbstractCegarLoop]: Abstraction has has 1159 places, 1012 transitions, 3092 flow [2022-11-20 09:32:25,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 891.8939393939394) internal successors, (58865), 66 states have internal predecessors, (58865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:25,623 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:25,623 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:25,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-11-20 09:32:25,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:25,824 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1540818559, now seen corresponding path program 1 times [2022-11-20 09:32:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602829512] [2022-11-20 09:32:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:25,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602829512] [2022-11-20 09:32:27,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602829512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:27,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655748149] [2022-11-20 09:32:27,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:27,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:27,979 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:27,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-20 09:32:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:32:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:29,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:33,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655748149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:33,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:33,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:32:33,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818115502] [2022-11-20 09:32:33,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:33,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:32:33,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:33,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:32:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:32:33,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 889 out of 1126 [2022-11-20 09:32:33,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1159 places, 1012 transitions, 3092 flow. Second operand has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:33,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:33,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 889 of 1126 [2022-11-20 09:32:33,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:36,970 INFO L130 PetriNetUnfolder]: 0/1190 cut-off events. [2022-11-20 09:32:36,970 INFO L131 PetriNetUnfolder]: For 1692/1692 co-relation queries the response was YES. [2022-11-20 09:32:36,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 1190 events. 0/1190 cut-off events. For 1692/1692 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3031 event pairs, 0 based on Foata normal form. 2/1192 useless extension candidates. Maximal degree in co-relation 0. Up to 60 conditions per place. [2022-11-20 09:32:36,973 INFO L137 encePairwiseOnDemand]: 1121/1126 looper letters, 99 selfloop transitions, 97 changer transitions 0/1064 dead transitions. [2022-11-20 09:32:36,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1246 places, 1064 transitions, 3872 flow [2022-11-20 09:32:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-20 09:32:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-20 09:32:37,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 88209 transitions. [2022-11-20 09:32:37,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912966252220248 [2022-11-20 09:32:37,034 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 88209 transitions. [2022-11-20 09:32:37,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 88209 transitions. [2022-11-20 09:32:37,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:37,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 88209 transitions. [2022-11-20 09:32:37,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 891.0) internal successors, (88209), 99 states have internal predecessors, (88209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:37,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:37,204 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 1126.0) internal successors, (112600), 100 states have internal predecessors, (112600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:37,205 INFO L175 Difference]: Start difference. First operand has 1159 places, 1012 transitions, 3092 flow. Second operand 99 states and 88209 transitions. [2022-11-20 09:32:37,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1246 places, 1064 transitions, 3872 flow [2022-11-20 09:32:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1173 places, 1064 transitions, 3540 flow, removed 19 selfloop flow, removed 73 redundant places. [2022-11-20 09:32:37,222 INFO L231 Difference]: Finished difference. Result has 1173 places, 1004 transitions, 2970 flow [2022-11-20 09:32:37,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1126, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=1075, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=2970, PETRI_PLACES=1173, PETRI_TRANSITIONS=1004} [2022-11-20 09:32:37,223 INFO L288 CegarLoopForPetriNet]: 995 programPoint places, 178 predicate places. [2022-11-20 09:32:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 1173 places, 1004 transitions, 2970 flow [2022-11-20 09:32:37,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 891.9461538461538) internal successors, (115953), 130 states have internal predecessors, (115953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:37,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:37,235 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:37,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-11-20 09:32:37,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:37,435 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2144471914, now seen corresponding path program 1 times [2022-11-20 09:32:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:37,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818824314] [2022-11-20 09:32:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:32:37,482 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:32:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:32:37,621 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:32:37,622 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:32:37,622 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:32:37,622 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:32:37,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2022-11-20 09:32:37,622 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:37,623 WARN L233 ceAbstractionStarter]: 32 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:32:37,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 33 thread instances. [2022-11-20 09:32:37,718 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:32:37,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1024 places, 1159 transitions, 3539 flow [2022-11-20 09:32:39,191 INFO L130 PetriNetUnfolder]: 334/2342 cut-off events. [2022-11-20 09:32:39,191 INFO L131 PetriNetUnfolder]: For 6512/6512 co-relation queries the response was YES. [2022-11-20 09:32:39,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003 conditions, 2342 events. 334/2342 cut-off events. For 6512/6512 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8549 event pairs, 0 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 2870. Up to 68 conditions per place. [2022-11-20 09:32:39,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 1024 places, 1159 transitions, 3539 flow [2022-11-20 09:32:39,383 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1024 places, 1159 transitions, 3539 flow [2022-11-20 09:32:39,384 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:32:39,384 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:32:39,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:32:39,388 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:32:39,389 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:32:39,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:39,389 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] [2022-11-20 09:32:39,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -267367327, now seen corresponding path program 1 times [2022-11-20 09:32:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:39,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948675169] [2022-11-20 09:32:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:39,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948675169] [2022-11-20 09:32:39,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948675169] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:39,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:39,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:32:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118537472] [2022-11-20 09:32:39,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:39,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:32:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:39,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:32:39,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:32:39,412 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 923 out of 1159 [2022-11-20 09:32:39,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand has 2 states, 2 states have (on average 923.5) internal successors, (1847), 2 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:39,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:39,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 923 of 1159 [2022-11-20 09:32:39,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:40,853 INFO L130 PetriNetUnfolder]: 0/1974 cut-off events. [2022-11-20 09:32:40,853 INFO L131 PetriNetUnfolder]: For 7073/7073 co-relation queries the response was YES. [2022-11-20 09:32:40,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2669 conditions, 1974 events. 0/1974 cut-off events. For 7073/7073 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8063 event pairs, 0 based on Foata normal form. 3312/5218 useless extension candidates. Maximal degree in co-relation 0. Up to 34 conditions per place. [2022-11-20 09:32:40,857 INFO L137 encePairwiseOnDemand]: 957/1159 looper letters, 33 selfloop transitions, 0 changer transitions 11/956 dead transitions. [2022-11-20 09:32:40,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 956 transitions, 3199 flow [2022-11-20 09:32:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:32:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:32:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2081 transitions. [2022-11-20 09:32:40,859 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8977566867989646 [2022-11-20 09:32:40,859 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2081 transitions. [2022-11-20 09:32:40,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2081 transitions. [2022-11-20 09:32:40,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:40,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2081 transitions. [2022-11-20 09:32:40,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1040.5) internal successors, (2081), 2 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:40,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1159.0) internal successors, (3477), 3 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:40,862 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1159.0) internal successors, (3477), 3 states have internal predecessors, (3477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:40,862 INFO L175 Difference]: Start difference. First operand has 1024 places, 1159 transitions, 3539 flow. Second operand 2 states and 2081 transitions. [2022-11-20 09:32:40,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 956 transitions, 3199 flow [2022-11-20 09:32:40,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1024 places, 956 transitions, 2143 flow, removed 528 selfloop flow, removed 0 redundant places. [2022-11-20 09:32:40,876 INFO L231 Difference]: Finished difference. Result has 1024 places, 945 transitions, 2055 flow [2022-11-20 09:32:40,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2077, PETRI_DIFFERENCE_MINUEND_PLACES=1023, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=956, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2055, PETRI_PLACES=1024, PETRI_TRANSITIONS=945} [2022-11-20 09:32:40,876 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 0 predicate places. [2022-11-20 09:32:40,876 INFO L495 AbstractCegarLoop]: Abstraction has has 1024 places, 945 transitions, 2055 flow [2022-11-20 09:32:40,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 923.5) internal successors, (1847), 2 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:40,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:40,877 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] [2022-11-20 09:32:40,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2022-11-20 09:32:40,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:40,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2064318686, now seen corresponding path program 1 times [2022-11-20 09:32:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:40,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430611373] [2022-11-20 09:32:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:40,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:40,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430611373] [2022-11-20 09:32:40,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430611373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:32:40,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:32:40,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:32:40,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468075641] [2022-11-20 09:32:40,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:32:40,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:32:40,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:40,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:32:40,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:32:40,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 916 out of 1159 [2022-11-20 09:32:40,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1024 places, 945 transitions, 2055 flow. Second operand has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:40,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:40,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 916 of 1159 [2022-11-20 09:32:40,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:42,014 INFO L130 PetriNetUnfolder]: 0/1589 cut-off events. [2022-11-20 09:32:42,014 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-20 09:32:42,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 1589 events. 0/1589 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5503 event pairs, 0 based on Foata normal form. 0/1556 useless extension candidates. Maximal degree in co-relation 0. Up to 198 conditions per place. [2022-11-20 09:32:42,018 INFO L137 encePairwiseOnDemand]: 1156/1159 looper letters, 42 selfloop transitions, 2 changer transitions 0/949 dead transitions. [2022-11-20 09:32:42,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1015 places, 949 transitions, 2151 flow [2022-11-20 09:32:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:32:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:32:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2793 transitions. [2022-11-20 09:32:42,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8032786885245902 [2022-11-20 09:32:42,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2793 transitions. [2022-11-20 09:32:42,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2793 transitions. [2022-11-20 09:32:42,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:42,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2793 transitions. [2022-11-20 09:32:42,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 931.0) internal successors, (2793), 3 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,026 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1159.0) internal successors, (4636), 4 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,026 INFO L175 Difference]: Start difference. First operand has 1024 places, 945 transitions, 2055 flow. Second operand 3 states and 2793 transitions. [2022-11-20 09:32:42,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1015 places, 949 transitions, 2151 flow [2022-11-20 09:32:42,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1015 places, 949 transitions, 2151 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:32:42,035 INFO L231 Difference]: Finished difference. Result has 1016 places, 946 transitions, 2067 flow [2022-11-20 09:32:42,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=1013, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2067, PETRI_PLACES=1016, PETRI_TRANSITIONS=946} [2022-11-20 09:32:42,035 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, -8 predicate places. [2022-11-20 09:32:42,035 INFO L495 AbstractCegarLoop]: Abstraction has has 1016 places, 946 transitions, 2067 flow [2022-11-20 09:32:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 917.0) internal successors, (2751), 3 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:42,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:42,036 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] [2022-11-20 09:32:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2022-11-20 09:32:42,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:42,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:42,036 INFO L85 PathProgramCache]: Analyzing trace with hash 410736534, now seen corresponding path program 1 times [2022-11-20 09:32:42,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:42,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260340885] [2022-11-20 09:32:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:42,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:42,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:42,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260340885] [2022-11-20 09:32:42,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260340885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:42,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997338652] [2022-11-20 09:32:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:42,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:42,119 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:42,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-20 09:32:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:32:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:43,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:43,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997338652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:43,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:43,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:32:43,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478647088] [2022-11-20 09:32:43,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:43,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:32:43,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:32:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:32:43,335 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-20 09:32:43,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1016 places, 946 transitions, 2067 flow. Second operand has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:43,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:43,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-20 09:32:43,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:44,735 INFO L130 PetriNetUnfolder]: 0/1567 cut-off events. [2022-11-20 09:32:44,735 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 09:32:44,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1567 events. 0/1567 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5371 event pairs, 0 based on Foata normal form. 2/1569 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-20 09:32:44,738 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 43 selfloop transitions, 9 changer transitions 0/956 dead transitions. [2022-11-20 09:32:44,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1024 places, 956 transitions, 2193 flow [2022-11-20 09:32:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:32:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:32:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8289 transitions. [2022-11-20 09:32:44,744 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946505608283002 [2022-11-20 09:32:44,744 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8289 transitions. [2022-11-20 09:32:44,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8289 transitions. [2022-11-20 09:32:44,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:44,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8289 transitions. [2022-11-20 09:32:44,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 921.0) internal successors, (8289), 9 states have internal predecessors, (8289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,756 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1159.0) internal successors, (11590), 10 states have internal predecessors, (11590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,756 INFO L175 Difference]: Start difference. First operand has 1016 places, 946 transitions, 2067 flow. Second operand 9 states and 8289 transitions. [2022-11-20 09:32:44,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1024 places, 956 transitions, 2193 flow [2022-11-20 09:32:44,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1023 places, 956 transitions, 2191 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:32:44,769 INFO L231 Difference]: Finished difference. Result has 1026 places, 952 transitions, 2115 flow [2022-11-20 09:32:44,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=1015, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2115, PETRI_PLACES=1026, PETRI_TRANSITIONS=952} [2022-11-20 09:32:44,770 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 2 predicate places. [2022-11-20 09:32:44,770 INFO L495 AbstractCegarLoop]: Abstraction has has 1026 places, 952 transitions, 2115 flow [2022-11-20 09:32:44,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 917.3) internal successors, (9173), 10 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:44,771 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:44,771 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:44,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:44,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-11-20 09:32:44,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:44,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1249055297, now seen corresponding path program 1 times [2022-11-20 09:32:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:44,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081824124] [2022-11-20 09:32:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:45,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081824124] [2022-11-20 09:32:45,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081824124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411305706] [2022-11-20 09:32:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:45,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:45,059 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 09:32:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:32:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:46,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411305706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:46,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:46,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:32:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039016585] [2022-11-20 09:32:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:32:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:32:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:32:46,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-20 09:32:46,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1026 places, 952 transitions, 2115 flow. Second operand has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:46,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:46,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-20 09:32:46,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:47,691 INFO L130 PetriNetUnfolder]: 0/1523 cut-off events. [2022-11-20 09:32:47,691 INFO L131 PetriNetUnfolder]: For 192/192 co-relation queries the response was YES. [2022-11-20 09:32:47,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2204 conditions, 1523 events. 0/1523 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5054 event pairs, 0 based on Foata normal form. 4/1527 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-20 09:32:47,694 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 51 selfloop transitions, 21 changer transitions 0/976 dead transitions. [2022-11-20 09:32:47,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1046 places, 976 transitions, 2367 flow [2022-11-20 09:32:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:32:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:32:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19291 transitions. [2022-11-20 09:32:47,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792596244710136 [2022-11-20 09:32:47,704 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19291 transitions. [2022-11-20 09:32:47,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19291 transitions. [2022-11-20 09:32:47,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:47,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19291 transitions. [2022-11-20 09:32:47,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 918.6190476190476) internal successors, (19291), 21 states have internal predecessors, (19291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,732 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1159.0) internal successors, (25498), 22 states have internal predecessors, (25498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,732 INFO L175 Difference]: Start difference. First operand has 1026 places, 952 transitions, 2115 flow. Second operand 21 states and 19291 transitions. [2022-11-20 09:32:47,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1046 places, 976 transitions, 2367 flow [2022-11-20 09:32:47,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 976 transitions, 2353 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:32:47,743 INFO L231 Difference]: Finished difference. Result has 1050 places, 965 transitions, 2239 flow [2022-11-20 09:32:47,743 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=1025, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2239, PETRI_PLACES=1050, PETRI_TRANSITIONS=965} [2022-11-20 09:32:47,744 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 26 predicate places. [2022-11-20 09:32:47,744 INFO L495 AbstractCegarLoop]: Abstraction has has 1050 places, 965 transitions, 2239 flow [2022-11-20 09:32:47,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 917.6111111111111) internal successors, (16517), 18 states have internal predecessors, (16517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:47,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:47,746 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:47,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-11-20 09:32:47,946 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:47,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1630016605, now seen corresponding path program 1 times [2022-11-20 09:32:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:47,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536985646] [2022-11-20 09:32:47,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:47,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536985646] [2022-11-20 09:32:48,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536985646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551175656] [2022-11-20 09:32:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:48,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:48,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:48,139 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:48,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-11-20 09:32:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:32:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:49,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:49,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551175656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:49,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:49,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:32:49,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110216165] [2022-11-20 09:32:49,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:32:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:32:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:32:49,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-20 09:32:49,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1050 places, 965 transitions, 2239 flow. Second operand has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:49,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:49,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-20 09:32:49,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:51,840 INFO L130 PetriNetUnfolder]: 0/1435 cut-off events. [2022-11-20 09:32:51,840 INFO L131 PetriNetUnfolder]: For 762/762 co-relation queries the response was YES. [2022-11-20 09:32:51,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1435 events. 0/1435 cut-off events. For 762/762 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4478 event pairs, 0 based on Foata normal form. 8/1443 useless extension candidates. Maximal degree in co-relation 0. Up to 79 conditions per place. [2022-11-20 09:32:51,844 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 67 selfloop transitions, 45 changer transitions 0/1016 dead transitions. [2022-11-20 09:32:51,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 1016 transitions, 2779 flow [2022-11-20 09:32:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:32:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:32:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 41295 transitions. [2022-11-20 09:32:51,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7917745182628703 [2022-11-20 09:32:51,871 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 41295 transitions. [2022-11-20 09:32:51,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 41295 transitions. [2022-11-20 09:32:51,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:51,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 41295 transitions. [2022-11-20 09:32:51,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 917.6666666666666) internal successors, (41295), 45 states have internal predecessors, (41295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,939 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1159.0) internal successors, (53314), 46 states have internal predecessors, (53314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,939 INFO L175 Difference]: Start difference. First operand has 1050 places, 965 transitions, 2239 flow. Second operand 45 states and 41295 transitions. [2022-11-20 09:32:51,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1094 places, 1016 transitions, 2779 flow [2022-11-20 09:32:51,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1088 places, 1016 transitions, 2739 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:32:51,953 INFO L231 Difference]: Finished difference. Result has 1097 places, 990 transitions, 2517 flow [2022-11-20 09:32:51,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=942, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2517, PETRI_PLACES=1097, PETRI_TRANSITIONS=990} [2022-11-20 09:32:51,954 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 73 predicate places. [2022-11-20 09:32:51,954 INFO L495 AbstractCegarLoop]: Abstraction has has 1097 places, 990 transitions, 2517 flow [2022-11-20 09:32:51,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 917.7941176470588) internal successors, (31205), 34 states have internal predecessors, (31205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:51,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:51,958 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:51,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-11-20 09:32:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-11-20 09:32:52,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1766954647, now seen corresponding path program 1 times [2022-11-20 09:32:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362473968] [2022-11-20 09:32:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:52,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:32:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362473968] [2022-11-20 09:32:52,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362473968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:32:52,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841674567] [2022-11-20 09:32:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:52,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:52,785 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-20 09:32:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:32:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:32:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:54,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:32:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:32:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841674567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:32:55,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:32:55,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:32:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296304034] [2022-11-20 09:32:55,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:32:55,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:32:55,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:32:55,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:32:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:32:55,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-20 09:32:55,284 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1097 places, 990 transitions, 2517 flow. Second operand has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:55,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:32:55,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-20 09:32:55,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:32:58,589 INFO L130 PetriNetUnfolder]: 0/1259 cut-off events. [2022-11-20 09:32:58,589 INFO L131 PetriNetUnfolder]: For 2466/2466 co-relation queries the response was YES. [2022-11-20 09:32:58,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2185 conditions, 1259 events. 0/1259 cut-off events. For 2466/2466 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3329 event pairs, 0 based on Foata normal form. 16/1275 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-20 09:32:58,592 INFO L137 encePairwiseOnDemand]: 1153/1159 looper letters, 99 selfloop transitions, 93 changer transitions 0/1096 dead transitions. [2022-11-20 09:32:58,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1189 places, 1096 transitions, 3749 flow [2022-11-20 09:32:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:32:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:32:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 85303 transitions. [2022-11-20 09:32:58,632 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7914034159963632 [2022-11-20 09:32:58,632 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 85303 transitions. [2022-11-20 09:32:58,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 85303 transitions. [2022-11-20 09:32:58,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:32:58,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 85303 transitions. [2022-11-20 09:32:58,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 917.236559139785) internal successors, (85303), 93 states have internal predecessors, (85303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:58,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:58,760 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1159.0) internal successors, (108946), 94 states have internal predecessors, (108946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:58,760 INFO L175 Difference]: Start difference. First operand has 1097 places, 990 transitions, 2517 flow. Second operand 93 states and 85303 transitions. [2022-11-20 09:32:58,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1189 places, 1096 transitions, 3749 flow [2022-11-20 09:32:58,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1171 places, 1096 transitions, 3661 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:32:58,788 INFO L231 Difference]: Finished difference. Result has 1188 places, 1039 transitions, 3151 flow [2022-11-20 09:32:58,788 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=1079, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=943, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3151, PETRI_PLACES=1188, PETRI_TRANSITIONS=1039} [2022-11-20 09:32:58,788 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 164 predicate places. [2022-11-20 09:32:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 1188 places, 1039 transitions, 3151 flow [2022-11-20 09:32:58,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 917.8939393939394) internal successors, (60581), 66 states have internal predecessors, (60581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:32:58,793 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:32:58,793 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:58,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:58,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:58,994 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:32:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:58,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2128612671, now seen corresponding path program 1 times [2022-11-20 09:32:58,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:58,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714996580] [2022-11-20 09:32:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:58,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:01,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714996580] [2022-11-20 09:33:01,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714996580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:01,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228898824] [2022-11-20 09:33:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:01,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:01,657 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:01,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-11-20 09:33:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:33:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:03,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:07,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228898824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:07,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:07,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:33:07,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446980903] [2022-11-20 09:33:07,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:07,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:33:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:33:07,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:33:07,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 915 out of 1159 [2022-11-20 09:33:07,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1188 places, 1039 transitions, 3151 flow. Second operand has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:07,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:07,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 915 of 1159 [2022-11-20 09:33:07,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:10,991 INFO L130 PetriNetUnfolder]: 0/1226 cut-off events. [2022-11-20 09:33:10,991 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-11-20 09:33:10,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2216 conditions, 1226 events. 0/1226 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3129 event pairs, 0 based on Foata normal form. 3/1229 useless extension candidates. Maximal degree in co-relation 0. Up to 62 conditions per place. [2022-11-20 09:33:10,993 INFO L137 encePairwiseOnDemand]: 1154/1159 looper letters, 102 selfloop transitions, 100 changer transitions 0/1096 dead transitions. [2022-11-20 09:33:10,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1096 transitions, 3997 flow [2022-11-20 09:33:10,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-20 09:33:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2022-11-20 09:33:11,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 93535 transitions. [2022-11-20 09:33:11,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912077686985062 [2022-11-20 09:33:11,033 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 93535 transitions. [2022-11-20 09:33:11,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 93535 transitions. [2022-11-20 09:33:11,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:11,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 93535 transitions. [2022-11-20 09:33:11,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 917.0098039215686) internal successors, (93535), 102 states have internal predecessors, (93535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:11,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:11,165 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 1159.0) internal successors, (119377), 103 states have internal predecessors, (119377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:11,165 INFO L175 Difference]: Start difference. First operand has 1188 places, 1039 transitions, 3151 flow. Second operand 102 states and 93535 transitions. [2022-11-20 09:33:11,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1096 transitions, 3997 flow [2022-11-20 09:33:11,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1205 places, 1096 transitions, 3655 flow, removed 20 selfloop flow, removed 73 redundant places. [2022-11-20 09:33:11,185 INFO L231 Difference]: Finished difference. Result has 1205 places, 1034 transitions, 3063 flow [2022-11-20 09:33:11,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1159, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=1104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=934, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=3063, PETRI_PLACES=1205, PETRI_TRANSITIONS=1034} [2022-11-20 09:33:11,186 INFO L288 CegarLoopForPetriNet]: 1024 programPoint places, 181 predicate places. [2022-11-20 09:33:11,186 INFO L495 AbstractCegarLoop]: Abstraction has has 1205 places, 1034 transitions, 3063 flow [2022-11-20 09:33:11,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 917.9461538461538) internal successors, (119333), 130 states have internal predecessors, (119333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:11,198 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:11,198 INFO L209 CegarLoopForPetriNet]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:11,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-11-20 09:33:11,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:11,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1805696958, now seen corresponding path program 1 times [2022-11-20 09:33:11,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307306328] [2022-11-20 09:33:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:11,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:33:11,453 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:33:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:33:11,569 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:33:11,570 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:33:11,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:33:11,570 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:33:11,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2022-11-20 09:33:11,570 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:11,570 WARN L233 ceAbstractionStarter]: 33 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:33:11,570 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 34 thread instances. [2022-11-20 09:33:11,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:33:11,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1053 places, 1192 transitions, 3676 flow [2022-11-20 09:33:13,366 INFO L130 PetriNetUnfolder]: 344/2411 cut-off events. [2022-11-20 09:33:13,366 INFO L131 PetriNetUnfolder]: For 7106/7106 co-relation queries the response was YES. [2022-11-20 09:33:13,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 2411 events. 344/2411 cut-off events. For 7106/7106 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 8829 event pairs, 0 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 2975. Up to 70 conditions per place. [2022-11-20 09:33:13,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 1053 places, 1192 transitions, 3676 flow [2022-11-20 09:33:13,635 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1053 places, 1192 transitions, 3676 flow [2022-11-20 09:33:13,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:33:13,636 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:33:13,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:33:13,640 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:33:13,640 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:33:13,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:13,640 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] [2022-11-20 09:33:13,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1987290527, now seen corresponding path program 1 times [2022-11-20 09:33:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:13,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760350489] [2022-11-20 09:33:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:13,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:13,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:13,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760350489] [2022-11-20 09:33:13,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760350489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:13,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:33:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150978061] [2022-11-20 09:33:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:33:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:33:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:33:13,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 949 out of 1192 [2022-11-20 09:33:13,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand has 2 states, 2 states have (on average 949.5) internal successors, (1899), 2 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:13,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:13,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 949 of 1192 [2022-11-20 09:33:13,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:15,079 INFO L130 PetriNetUnfolder]: 0/2032 cut-off events. [2022-11-20 09:33:15,079 INFO L131 PetriNetUnfolder]: For 7701/7701 co-relation queries the response was YES. [2022-11-20 09:33:15,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 2032 events. 0/2032 cut-off events. For 7701/7701 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8310 event pairs, 0 based on Foata normal form. 3514/5476 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2022-11-20 09:33:15,083 INFO L137 encePairwiseOnDemand]: 984/1192 looper letters, 34 selfloop transitions, 0 changer transitions 11/983 dead transitions. [2022-11-20 09:33:15,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 983 transitions, 3326 flow [2022-11-20 09:33:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:33:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:33:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2140 transitions. [2022-11-20 09:33:15,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976510067114094 [2022-11-20 09:33:15,085 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2140 transitions. [2022-11-20 09:33:15,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2140 transitions. [2022-11-20 09:33:15,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:15,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2140 transitions. [2022-11-20 09:33:15,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1070.0) internal successors, (2140), 2 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1192.0) internal successors, (3576), 3 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,088 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1192.0) internal successors, (3576), 3 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,088 INFO L175 Difference]: Start difference. First operand has 1053 places, 1192 transitions, 3676 flow. Second operand 2 states and 2140 transitions. [2022-11-20 09:33:15,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1053 places, 983 transitions, 3326 flow [2022-11-20 09:33:15,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1053 places, 983 transitions, 2204 flow, removed 561 selfloop flow, removed 0 redundant places. [2022-11-20 09:33:15,112 INFO L231 Difference]: Finished difference. Result has 1053 places, 972 transitions, 2114 flow [2022-11-20 09:33:15,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=1052, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=983, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2114, PETRI_PLACES=1053, PETRI_TRANSITIONS=972} [2022-11-20 09:33:15,113 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 0 predicate places. [2022-11-20 09:33:15,113 INFO L495 AbstractCegarLoop]: Abstraction has has 1053 places, 972 transitions, 2114 flow [2022-11-20 09:33:15,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 949.5) internal successors, (1899), 2 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:15,114 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] [2022-11-20 09:33:15,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2022-11-20 09:33:15,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:15,115 INFO L85 PathProgramCache]: Analyzing trace with hash 510725410, now seen corresponding path program 1 times [2022-11-20 09:33:15,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:15,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908641500] [2022-11-20 09:33:15,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:15,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:15,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908641500] [2022-11-20 09:33:15,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908641500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:15,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:15,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:33:15,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489705099] [2022-11-20 09:33:15,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:15,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:33:15,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:33:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:33:15,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 942 out of 1192 [2022-11-20 09:33:15,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1053 places, 972 transitions, 2114 flow. Second operand has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:15,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:15,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 942 of 1192 [2022-11-20 09:33:15,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:16,310 INFO L130 PetriNetUnfolder]: 0/1636 cut-off events. [2022-11-20 09:33:16,310 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-20 09:33:16,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 1636 events. 0/1636 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5674 event pairs, 0 based on Foata normal form. 0/1602 useless extension candidates. Maximal degree in co-relation 0. Up to 204 conditions per place. [2022-11-20 09:33:16,312 INFO L137 encePairwiseOnDemand]: 1189/1192 looper letters, 43 selfloop transitions, 2 changer transitions 0/976 dead transitions. [2022-11-20 09:33:16,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1044 places, 976 transitions, 2212 flow [2022-11-20 09:33:16,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:33:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:33:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2872 transitions. [2022-11-20 09:33:16,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8031319910514542 [2022-11-20 09:33:16,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2872 transitions. [2022-11-20 09:33:16,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2872 transitions. [2022-11-20 09:33:16,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:16,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2872 transitions. [2022-11-20 09:33:16,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 957.3333333333334) internal successors, (2872), 3 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:16,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:16,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1192.0) internal successors, (4768), 4 states have internal predecessors, (4768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:16,319 INFO L175 Difference]: Start difference. First operand has 1053 places, 972 transitions, 2114 flow. Second operand 3 states and 2872 transitions. [2022-11-20 09:33:16,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1044 places, 976 transitions, 2212 flow [2022-11-20 09:33:16,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1044 places, 976 transitions, 2212 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:33:16,326 INFO L231 Difference]: Finished difference. Result has 1045 places, 973 transitions, 2126 flow [2022-11-20 09:33:16,326 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=1042, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2126, PETRI_PLACES=1045, PETRI_TRANSITIONS=973} [2022-11-20 09:33:16,327 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, -8 predicate places. [2022-11-20 09:33:16,327 INFO L495 AbstractCegarLoop]: Abstraction has has 1045 places, 973 transitions, 2126 flow [2022-11-20 09:33:16,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 943.0) internal successors, (2829), 3 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:16,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:16,327 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] [2022-11-20 09:33:16,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2022-11-20 09:33:16,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:16,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1460662602, now seen corresponding path program 1 times [2022-11-20 09:33:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959601887] [2022-11-20 09:33:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959601887] [2022-11-20 09:33:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959601887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130188661] [2022-11-20 09:33:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:16,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:16,370 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:16,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-11-20 09:33:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:33:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:17,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:17,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130188661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:17,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:17,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:33:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448791753] [2022-11-20 09:33:17,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:17,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-20 09:33:17,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1045 places, 973 transitions, 2126 flow. Second operand has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:17,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:17,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-20 09:33:17,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:19,182 INFO L130 PetriNetUnfolder]: 0/1614 cut-off events. [2022-11-20 09:33:19,182 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 09:33:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 1614 events. 0/1614 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5544 event pairs, 0 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-20 09:33:19,188 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 44 selfloop transitions, 9 changer transitions 0/983 dead transitions. [2022-11-20 09:33:19,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1053 places, 983 transitions, 2254 flow [2022-11-20 09:33:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:33:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:33:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8524 transitions. [2022-11-20 09:33:19,194 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7945563012677107 [2022-11-20 09:33:19,195 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8524 transitions. [2022-11-20 09:33:19,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8524 transitions. [2022-11-20 09:33:19,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8524 transitions. [2022-11-20 09:33:19,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 947.1111111111111) internal successors, (8524), 9 states have internal predecessors, (8524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:19,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:19,207 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1192.0) internal successors, (11920), 10 states have internal predecessors, (11920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:19,207 INFO L175 Difference]: Start difference. First operand has 1045 places, 973 transitions, 2126 flow. Second operand 9 states and 8524 transitions. [2022-11-20 09:33:19,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1053 places, 983 transitions, 2254 flow [2022-11-20 09:33:19,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1052 places, 983 transitions, 2252 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:33:19,217 INFO L231 Difference]: Finished difference. Result has 1055 places, 979 transitions, 2174 flow [2022-11-20 09:33:19,217 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2124, PETRI_DIFFERENCE_MINUEND_PLACES=1044, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=967, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=1055, PETRI_TRANSITIONS=979} [2022-11-20 09:33:19,217 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 2 predicate places. [2022-11-20 09:33:19,217 INFO L495 AbstractCegarLoop]: Abstraction has has 1055 places, 979 transitions, 2174 flow [2022-11-20 09:33:19,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 943.3) internal successors, (9433), 10 states have internal predecessors, (9433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:19,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:19,219 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:19,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:19,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-11-20 09:33:19,419 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:19,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:19,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1788896161, now seen corresponding path program 1 times [2022-11-20 09:33:19,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:19,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481129307] [2022-11-20 09:33:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:19,496 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:19,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:19,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481129307] [2022-11-20 09:33:19,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481129307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:19,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104392344] [2022-11-20 09:33:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:19,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:19,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:19,498 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:19,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 09:33:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:20,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:33:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:20,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104392344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:20,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:20,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:33:20,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975795361] [2022-11-20 09:33:20,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:20,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:33:20,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:33:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:33:20,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-20 09:33:20,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1055 places, 979 transitions, 2174 flow. Second operand has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:20,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:20,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-20 09:33:20,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:22,498 INFO L130 PetriNetUnfolder]: 0/1570 cut-off events. [2022-11-20 09:33:22,498 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-20 09:33:22,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 1570 events. 0/1570 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5224 event pairs, 0 based on Foata normal form. 4/1574 useless extension candidates. Maximal degree in co-relation 0. Up to 115 conditions per place. [2022-11-20 09:33:22,501 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 52 selfloop transitions, 21 changer transitions 0/1003 dead transitions. [2022-11-20 09:33:22,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1075 places, 1003 transitions, 2428 flow [2022-11-20 09:33:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:33:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:33:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 19838 transitions. [2022-11-20 09:33:22,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7925055928411633 [2022-11-20 09:33:22,512 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 19838 transitions. [2022-11-20 09:33:22,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 19838 transitions. [2022-11-20 09:33:22,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:22,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 19838 transitions. [2022-11-20 09:33:22,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 944.6666666666666) internal successors, (19838), 21 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:22,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:22,545 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1192.0) internal successors, (26224), 22 states have internal predecessors, (26224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:22,545 INFO L175 Difference]: Start difference. First operand has 1055 places, 979 transitions, 2174 flow. Second operand 21 states and 19838 transitions. [2022-11-20 09:33:22,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1075 places, 1003 transitions, 2428 flow [2022-11-20 09:33:22,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1074 places, 1003 transitions, 2414 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:33:22,559 INFO L231 Difference]: Finished difference. Result has 1079 places, 992 transitions, 2298 flow [2022-11-20 09:33:22,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=1054, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=979, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=968, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2298, PETRI_PLACES=1079, PETRI_TRANSITIONS=992} [2022-11-20 09:33:22,560 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 26 predicate places. [2022-11-20 09:33:22,560 INFO L495 AbstractCegarLoop]: Abstraction has has 1079 places, 992 transitions, 2298 flow [2022-11-20 09:33:22,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 943.6111111111111) internal successors, (16985), 18 states have internal predecessors, (16985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:22,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:22,562 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:22,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:22,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:22,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1716228483, now seen corresponding path program 1 times [2022-11-20 09:33:22,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:22,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135656270] [2022-11-20 09:33:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:22,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135656270] [2022-11-20 09:33:22,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135656270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990111220] [2022-11-20 09:33:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:22,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:22,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:22,978 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:22,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-20 09:33:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:33:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:24,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:24,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990111220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:24,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:24,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:33:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532901744] [2022-11-20 09:33:24,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:24,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:33:24,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:33:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:33:24,631 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-20 09:33:24,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1079 places, 992 transitions, 2298 flow. Second operand has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:24,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:24,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-20 09:33:24,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:26,642 INFO L130 PetriNetUnfolder]: 0/1482 cut-off events. [2022-11-20 09:33:26,642 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-20 09:33:26,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 1482 events. 0/1482 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4665 event pairs, 0 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 0. Up to 83 conditions per place. [2022-11-20 09:33:26,646 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 68 selfloop transitions, 45 changer transitions 0/1043 dead transitions. [2022-11-20 09:33:26,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1123 places, 1043 transitions, 2840 flow [2022-11-20 09:33:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:33:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:33:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 42466 transitions. [2022-11-20 09:33:26,669 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916853094705444 [2022-11-20 09:33:26,669 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 42466 transitions. [2022-11-20 09:33:26,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 42466 transitions. [2022-11-20 09:33:26,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:26,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 42466 transitions. [2022-11-20 09:33:26,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 943.6888888888889) internal successors, (42466), 45 states have internal predecessors, (42466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:26,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:26,735 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1192.0) internal successors, (54832), 46 states have internal predecessors, (54832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:26,735 INFO L175 Difference]: Start difference. First operand has 1079 places, 992 transitions, 2298 flow. Second operand 45 states and 42466 transitions. [2022-11-20 09:33:26,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1123 places, 1043 transitions, 2840 flow [2022-11-20 09:33:26,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1117 places, 1043 transitions, 2800 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:33:26,753 INFO L231 Difference]: Finished difference. Result has 1126 places, 1017 transitions, 2576 flow [2022-11-20 09:33:26,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=992, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=969, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2576, PETRI_PLACES=1126, PETRI_TRANSITIONS=1017} [2022-11-20 09:33:26,754 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 73 predicate places. [2022-11-20 09:33:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 1126 places, 1017 transitions, 2576 flow [2022-11-20 09:33:26,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 943.7941176470588) internal successors, (32089), 34 states have internal predecessors, (32089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:26,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:26,758 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:26,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-20 09:33:26,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:26,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:26,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1335466633, now seen corresponding path program 1 times [2022-11-20 09:33:26,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:26,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237165799] [2022-11-20 09:33:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:26,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237165799] [2022-11-20 09:33:27,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237165799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:27,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211215066] [2022-11-20 09:33:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:27,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:27,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:27,581 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:27,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-11-20 09:33:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:33:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:29,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:30,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211215066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:30,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:30,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:33:30,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068715810] [2022-11-20 09:33:30,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:30,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:33:30,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:30,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:33:30,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:33:30,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-20 09:33:30,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1126 places, 1017 transitions, 2576 flow. Second operand has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:30,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:30,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-20 09:33:30,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:33,578 INFO L130 PetriNetUnfolder]: 0/1306 cut-off events. [2022-11-20 09:33:33,578 INFO L131 PetriNetUnfolder]: For 2587/2587 co-relation queries the response was YES. [2022-11-20 09:33:33,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 1306 events. 0/1306 cut-off events. For 2587/2587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3500 event pairs, 0 based on Foata normal form. 16/1322 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-20 09:33:33,581 INFO L137 encePairwiseOnDemand]: 1186/1192 looper letters, 100 selfloop transitions, 93 changer transitions 0/1123 dead transitions. [2022-11-20 09:33:33,581 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1123 transitions, 3810 flow [2022-11-20 09:33:33,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:33:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:33:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 87722 transitions. [2022-11-20 09:33:33,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913148589160713 [2022-11-20 09:33:33,620 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 87722 transitions. [2022-11-20 09:33:33,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 87722 transitions. [2022-11-20 09:33:33,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:33,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 87722 transitions. [2022-11-20 09:33:33,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 943.247311827957) internal successors, (87722), 93 states have internal predecessors, (87722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:33,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:33,739 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1192.0) internal successors, (112048), 94 states have internal predecessors, (112048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:33,740 INFO L175 Difference]: Start difference. First operand has 1126 places, 1017 transitions, 2576 flow. Second operand 93 states and 87722 transitions. [2022-11-20 09:33:33,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 1123 transitions, 3810 flow [2022-11-20 09:33:33,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1200 places, 1123 transitions, 3722 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:33:33,760 INFO L231 Difference]: Finished difference. Result has 1217 places, 1066 transitions, 3210 flow [2022-11-20 09:33:33,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=1108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3210, PETRI_PLACES=1217, PETRI_TRANSITIONS=1066} [2022-11-20 09:33:33,761 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 164 predicate places. [2022-11-20 09:33:33,761 INFO L495 AbstractCegarLoop]: Abstraction has has 1217 places, 1066 transitions, 3210 flow [2022-11-20 09:33:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 943.8939393939394) internal successors, (62297), 66 states have internal predecessors, (62297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:33,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:33,767 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:33,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-11-20 09:33:33,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:33,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -678875617, now seen corresponding path program 1 times [2022-11-20 09:33:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:33,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38562849] [2022-11-20 09:33:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:36,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38562849] [2022-11-20 09:33:36,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38562849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:36,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129426237] [2022-11-20 09:33:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:36,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:36,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:36,326 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:36,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-11-20 09:33:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:33:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:38,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129426237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:41,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:41,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:33:41,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496756280] [2022-11-20 09:33:41,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:33:41,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:33:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:33:41,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 941 out of 1192 [2022-11-20 09:33:41,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1217 places, 1066 transitions, 3210 flow. Second operand has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:41,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:41,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 941 of 1192 [2022-11-20 09:33:41,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:46,075 INFO L130 PetriNetUnfolder]: 0/1262 cut-off events. [2022-11-20 09:33:46,075 INFO L131 PetriNetUnfolder]: For 2686/2686 co-relation queries the response was YES. [2022-11-20 09:33:46,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2284 conditions, 1262 events. 0/1262 cut-off events. For 2686/2686 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3227 event pairs, 0 based on Foata normal form. 4/1266 useless extension candidates. Maximal degree in co-relation 0. Up to 64 conditions per place. [2022-11-20 09:33:46,077 INFO L137 encePairwiseOnDemand]: 1187/1192 looper letters, 105 selfloop transitions, 103 changer transitions 0/1128 dead transitions. [2022-11-20 09:33:46,077 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1310 places, 1128 transitions, 4122 flow [2022-11-20 09:33:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-20 09:33:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-20 09:33:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 99017 transitions. [2022-11-20 09:33:46,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911233620965165 [2022-11-20 09:33:46,121 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 99017 transitions. [2022-11-20 09:33:46,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 99017 transitions. [2022-11-20 09:33:46,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:46,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 99017 transitions. [2022-11-20 09:33:46,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 943.0190476190476) internal successors, (99017), 105 states have internal predecessors, (99017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:46,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:46,540 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 1192.0) internal successors, (126352), 106 states have internal predecessors, (126352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:46,540 INFO L175 Difference]: Start difference. First operand has 1217 places, 1066 transitions, 3210 flow. Second operand 105 states and 99017 transitions. [2022-11-20 09:33:46,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1310 places, 1128 transitions, 4122 flow [2022-11-20 09:33:46,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1237 places, 1128 transitions, 3770 flow, removed 21 selfloop flow, removed 73 redundant places. [2022-11-20 09:33:46,559 INFO L231 Difference]: Finished difference. Result has 1237 places, 1064 transitions, 3156 flow [2022-11-20 09:33:46,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1192, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=1133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=961, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=3156, PETRI_PLACES=1237, PETRI_TRANSITIONS=1064} [2022-11-20 09:33:46,560 INFO L288 CegarLoopForPetriNet]: 1053 programPoint places, 184 predicate places. [2022-11-20 09:33:46,560 INFO L495 AbstractCegarLoop]: Abstraction has has 1237 places, 1064 transitions, 3156 flow [2022-11-20 09:33:46,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 943.9461538461538) internal successors, (122713), 130 states have internal predecessors, (122713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:46,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:46,570 INFO L209 CegarLoopForPetriNet]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:46,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:46,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-11-20 09:33:46,770 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1145413005, now seen corresponding path program 1 times [2022-11-20 09:33:46,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:46,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294563634] [2022-11-20 09:33:46,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:46,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:33:46,954 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:33:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:33:47,098 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:33:47,098 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:33:47,098 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:33:47,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:33:47,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2022-11-20 09:33:47,099 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:47,099 WARN L233 ceAbstractionStarter]: 34 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:33:47,099 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 35 thread instances. [2022-11-20 09:33:47,194 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:33:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1082 places, 1225 transitions, 3815 flow [2022-11-20 09:33:48,984 INFO L130 PetriNetUnfolder]: 354/2480 cut-off events. [2022-11-20 09:33:48,984 INFO L131 PetriNetUnfolder]: For 7735/7735 co-relation queries the response was YES. [2022-11-20 09:33:49,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 2480 events. 354/2480 cut-off events. For 7735/7735 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9101 event pairs, 0 based on Foata normal form. 0/2054 useless extension candidates. Maximal degree in co-relation 3081. Up to 72 conditions per place. [2022-11-20 09:33:49,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 1082 places, 1225 transitions, 3815 flow [2022-11-20 09:33:49,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1082 places, 1225 transitions, 3815 flow [2022-11-20 09:33:49,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:33:49,248 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:33:49,248 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:33:49,252 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:33:49,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:33:49,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:49,252 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] [2022-11-20 09:33:49,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:49,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:49,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1283060959, now seen corresponding path program 1 times [2022-11-20 09:33:49,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:49,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551765651] [2022-11-20 09:33:49,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:49,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:49,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:49,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551765651] [2022-11-20 09:33:49,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551765651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:49,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:49,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:33:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424458388] [2022-11-20 09:33:49,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:49,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:33:49,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:49,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:33:49,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:33:49,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 975 out of 1225 [2022-11-20 09:33:49,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand has 2 states, 2 states have (on average 975.5) internal successors, (1951), 2 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:49,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:49,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 975 of 1225 [2022-11-20 09:33:49,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:50,988 INFO L130 PetriNetUnfolder]: 0/2090 cut-off events. [2022-11-20 09:33:50,988 INFO L131 PetriNetUnfolder]: For 8365/8365 co-relation queries the response was YES. [2022-11-20 09:33:50,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2862 conditions, 2090 events. 0/2090 cut-off events. For 8365/8365 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8557 event pairs, 0 based on Foata normal form. 3722/5740 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2022-11-20 09:33:50,992 INFO L137 encePairwiseOnDemand]: 1011/1225 looper letters, 35 selfloop transitions, 0 changer transitions 11/1010 dead transitions. [2022-11-20 09:33:50,992 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 1010 transitions, 3455 flow [2022-11-20 09:33:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:33:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:33:50,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2199 transitions. [2022-11-20 09:33:50,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8975510204081633 [2022-11-20 09:33:50,994 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2199 transitions. [2022-11-20 09:33:50,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2199 transitions. [2022-11-20 09:33:50,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:50,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2199 transitions. [2022-11-20 09:33:50,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1099.5) internal successors, (2199), 2 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:50,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1225.0) internal successors, (3675), 3 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:50,998 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1225.0) internal successors, (3675), 3 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:50,998 INFO L175 Difference]: Start difference. First operand has 1082 places, 1225 transitions, 3815 flow. Second operand 2 states and 2199 transitions. [2022-11-20 09:33:50,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 1010 transitions, 3455 flow [2022-11-20 09:33:51,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1082 places, 1010 transitions, 2265 flow, removed 595 selfloop flow, removed 0 redundant places. [2022-11-20 09:33:51,018 INFO L231 Difference]: Finished difference. Result has 1082 places, 999 transitions, 2173 flow [2022-11-20 09:33:51,018 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=1081, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2173, PETRI_PLACES=1082, PETRI_TRANSITIONS=999} [2022-11-20 09:33:51,019 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 0 predicate places. [2022-11-20 09:33:51,019 INFO L495 AbstractCegarLoop]: Abstraction has has 1082 places, 999 transitions, 2173 flow [2022-11-20 09:33:51,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 975.5) internal successors, (1951), 2 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:51,019 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:51,019 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] [2022-11-20 09:33:51,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2022-11-20 09:33:51,019 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1214954978, now seen corresponding path program 1 times [2022-11-20 09:33:51,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420342330] [2022-11-20 09:33:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:51,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:51,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420342330] [2022-11-20 09:33:51,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420342330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:33:51,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:33:51,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:33:51,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372554017] [2022-11-20 09:33:51,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:33:51,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:33:51,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:51,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:33:51,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:33:51,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 968 out of 1225 [2022-11-20 09:33:51,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1082 places, 999 transitions, 2173 flow. Second operand has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:51,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:51,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 968 of 1225 [2022-11-20 09:33:51,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:52,341 INFO L130 PetriNetUnfolder]: 0/1683 cut-off events. [2022-11-20 09:33:52,342 INFO L131 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-11-20 09:33:52,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2040 conditions, 1683 events. 0/1683 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5843 event pairs, 0 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 0. Up to 210 conditions per place. [2022-11-20 09:33:52,345 INFO L137 encePairwiseOnDemand]: 1222/1225 looper letters, 44 selfloop transitions, 2 changer transitions 0/1003 dead transitions. [2022-11-20 09:33:52,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1073 places, 1003 transitions, 2273 flow [2022-11-20 09:33:52,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:33:52,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:33:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2951 transitions. [2022-11-20 09:33:52,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8029931972789116 [2022-11-20 09:33:52,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 2951 transitions. [2022-11-20 09:33:52,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 2951 transitions. [2022-11-20 09:33:52,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:52,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 2951 transitions. [2022-11-20 09:33:52,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 983.6666666666666) internal successors, (2951), 3 states have internal predecessors, (2951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1225.0) internal successors, (4900), 4 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,353 INFO L175 Difference]: Start difference. First operand has 1082 places, 999 transitions, 2173 flow. Second operand 3 states and 2951 transitions. [2022-11-20 09:33:52,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1073 places, 1003 transitions, 2273 flow [2022-11-20 09:33:52,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1073 places, 1003 transitions, 2273 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:33:52,361 INFO L231 Difference]: Finished difference. Result has 1074 places, 1000 transitions, 2185 flow [2022-11-20 09:33:52,362 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2173, PETRI_DIFFERENCE_MINUEND_PLACES=1071, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2185, PETRI_PLACES=1074, PETRI_TRANSITIONS=1000} [2022-11-20 09:33:52,362 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, -8 predicate places. [2022-11-20 09:33:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 1074 places, 1000 transitions, 2185 flow [2022-11-20 09:33:52,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 969.0) internal successors, (2907), 3 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:52,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:52,362 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] [2022-11-20 09:33:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2022-11-20 09:33:52,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2139833034, now seen corresponding path program 1 times [2022-11-20 09:33:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:52,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425337493] [2022-11-20 09:33:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425337493] [2022-11-20 09:33:52,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425337493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151163470] [2022-11-20 09:33:52,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:52,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:52,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:52,413 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:52,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-11-20 09:33:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:53,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:33:53,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:53,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:53,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151163470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:53,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:53,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:33:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019438923] [2022-11-20 09:33:53,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:33:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:33:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:33:53,773 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-20 09:33:53,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1074 places, 1000 transitions, 2185 flow. Second operand has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:53,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:53,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-20 09:33:53,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:55,528 INFO L130 PetriNetUnfolder]: 0/1661 cut-off events. [2022-11-20 09:33:55,528 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 09:33:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 1661 events. 0/1661 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5682 event pairs, 0 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-20 09:33:55,532 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 45 selfloop transitions, 9 changer transitions 0/1010 dead transitions. [2022-11-20 09:33:55,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 1010 transitions, 2315 flow [2022-11-20 09:33:55,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:33:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:33:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8759 transitions. [2022-11-20 09:33:55,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7944671201814059 [2022-11-20 09:33:55,537 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8759 transitions. [2022-11-20 09:33:55,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8759 transitions. [2022-11-20 09:33:55,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:55,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8759 transitions. [2022-11-20 09:33:55,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 973.2222222222222) internal successors, (8759), 9 states have internal predecessors, (8759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:55,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:55,550 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1225.0) internal successors, (12250), 10 states have internal predecessors, (12250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:55,550 INFO L175 Difference]: Start difference. First operand has 1074 places, 1000 transitions, 2185 flow. Second operand 9 states and 8759 transitions. [2022-11-20 09:33:55,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 1010 transitions, 2315 flow [2022-11-20 09:33:55,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1081 places, 1010 transitions, 2313 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:33:55,560 INFO L231 Difference]: Finished difference. Result has 1084 places, 1006 transitions, 2233 flow [2022-11-20 09:33:55,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=1073, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=994, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2233, PETRI_PLACES=1084, PETRI_TRANSITIONS=1006} [2022-11-20 09:33:55,560 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 2 predicate places. [2022-11-20 09:33:55,560 INFO L495 AbstractCegarLoop]: Abstraction has has 1084 places, 1006 transitions, 2233 flow [2022-11-20 09:33:55,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 969.3) internal successors, (9693), 10 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:55,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:55,562 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:55,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-11-20 09:33:55,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-11-20 09:33:55,762 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:55,762 INFO L85 PathProgramCache]: Analyzing trace with hash -582976095, now seen corresponding path program 1 times [2022-11-20 09:33:55,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:55,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372952459] [2022-11-20 09:33:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:55,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:55,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372952459] [2022-11-20 09:33:55,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372952459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:55,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630875500] [2022-11-20 09:33:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:55,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:55,841 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:55,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 09:33:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:33:57,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:33:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:57,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:57,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630875500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:33:57,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:33:57,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:33:57,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112320669] [2022-11-20 09:33:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:33:57,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:33:57,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:33:57,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:33:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:33:57,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-20 09:33:57,338 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1084 places, 1006 transitions, 2233 flow. Second operand has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:57,338 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:33:57,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-20 09:33:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:33:58,973 INFO L130 PetriNetUnfolder]: 0/1617 cut-off events. [2022-11-20 09:33:58,973 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-20 09:33:58,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 1617 events. 0/1617 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5423 event pairs, 0 based on Foata normal form. 4/1621 useless extension candidates. Maximal degree in co-relation 0. Up to 119 conditions per place. [2022-11-20 09:33:58,976 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 53 selfloop transitions, 21 changer transitions 0/1030 dead transitions. [2022-11-20 09:33:58,976 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1104 places, 1030 transitions, 2489 flow [2022-11-20 09:33:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:33:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:33:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20385 transitions. [2022-11-20 09:33:58,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7924198250728863 [2022-11-20 09:33:58,989 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20385 transitions. [2022-11-20 09:33:58,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20385 transitions. [2022-11-20 09:33:58,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:33:58,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20385 transitions. [2022-11-20 09:33:59,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 970.7142857142857) internal successors, (20385), 21 states have internal predecessors, (20385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,018 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1225.0) internal successors, (26950), 22 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,018 INFO L175 Difference]: Start difference. First operand has 1084 places, 1006 transitions, 2233 flow. Second operand 21 states and 20385 transitions. [2022-11-20 09:33:59,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1104 places, 1030 transitions, 2489 flow [2022-11-20 09:33:59,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1103 places, 1030 transitions, 2475 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:33:59,029 INFO L231 Difference]: Finished difference. Result has 1108 places, 1019 transitions, 2357 flow [2022-11-20 09:33:59,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2227, PETRI_DIFFERENCE_MINUEND_PLACES=1083, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2357, PETRI_PLACES=1108, PETRI_TRANSITIONS=1019} [2022-11-20 09:33:59,030 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 26 predicate places. [2022-11-20 09:33:59,030 INFO L495 AbstractCegarLoop]: Abstraction has has 1108 places, 1019 transitions, 2357 flow [2022-11-20 09:33:59,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 969.6111111111111) internal successors, (17453), 18 states have internal predecessors, (17453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:33:59,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:33:59,031 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:33:59,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-11-20 09:33:59,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-11-20 09:33:59,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:33:59,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:33:59,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2043167363, now seen corresponding path program 1 times [2022-11-20 09:33:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:33:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941396670] [2022-11-20 09:33:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:59,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:33:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:33:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:33:59,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:33:59,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941396670] [2022-11-20 09:33:59,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941396670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:33:59,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679574076] [2022-11-20 09:33:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:33:59,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:33:59,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:33:59,426 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:33:59,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-11-20 09:34:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:34:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:00,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:01,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679574076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:01,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:01,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:34:01,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065873079] [2022-11-20 09:34:01,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:01,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:34:01,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:34:01,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:34:01,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-20 09:34:01,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1108 places, 1019 transitions, 2357 flow. Second operand has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:01,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:01,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-20 09:34:01,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:03,553 INFO L130 PetriNetUnfolder]: 0/1529 cut-off events. [2022-11-20 09:34:03,553 INFO L131 PetriNetUnfolder]: For 816/816 co-relation queries the response was YES. [2022-11-20 09:34:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1529 events. 0/1529 cut-off events. For 816/816 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4837 event pairs, 0 based on Foata normal form. 8/1537 useless extension candidates. Maximal degree in co-relation 0. Up to 87 conditions per place. [2022-11-20 09:34:03,559 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 69 selfloop transitions, 45 changer transitions 0/1070 dead transitions. [2022-11-20 09:34:03,559 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1152 places, 1070 transitions, 2901 flow [2022-11-20 09:34:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:34:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:34:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 43637 transitions. [2022-11-20 09:34:03,580 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7916009070294785 [2022-11-20 09:34:03,580 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 43637 transitions. [2022-11-20 09:34:03,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 43637 transitions. [2022-11-20 09:34:03,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:03,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 43637 transitions. [2022-11-20 09:34:03,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 969.7111111111111) internal successors, (43637), 45 states have internal predecessors, (43637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:03,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:03,842 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1225.0) internal successors, (56350), 46 states have internal predecessors, (56350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:03,842 INFO L175 Difference]: Start difference. First operand has 1108 places, 1019 transitions, 2357 flow. Second operand 45 states and 43637 transitions. [2022-11-20 09:34:03,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1152 places, 1070 transitions, 2901 flow [2022-11-20 09:34:03,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1146 places, 1070 transitions, 2861 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:34:03,855 INFO L231 Difference]: Finished difference. Result has 1155 places, 1044 transitions, 2635 flow [2022-11-20 09:34:03,855 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=996, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2635, PETRI_PLACES=1155, PETRI_TRANSITIONS=1044} [2022-11-20 09:34:03,856 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 73 predicate places. [2022-11-20 09:34:03,856 INFO L495 AbstractCegarLoop]: Abstraction has has 1155 places, 1044 transitions, 2635 flow [2022-11-20 09:34:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 969.7941176470588) internal successors, (32973), 34 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:03,858 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:03,859 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:03,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-11-20 09:34:04,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:04,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:04,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash -323795849, now seen corresponding path program 1 times [2022-11-20 09:34:04,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:04,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953846457] [2022-11-20 09:34:04,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:04,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953846457] [2022-11-20 09:34:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953846457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:04,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115916006] [2022-11-20 09:34:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:04,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:04,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:04,684 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:04,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-11-20 09:34:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:34:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:06,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:07,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115916006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:07,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:07,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:34:07,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507023667] [2022-11-20 09:34:07,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:07,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:34:07,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:34:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:34:07,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-20 09:34:07,317 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1155 places, 1044 transitions, 2635 flow. Second operand has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:07,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:07,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-20 09:34:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:10,875 INFO L130 PetriNetUnfolder]: 0/1353 cut-off events. [2022-11-20 09:34:10,875 INFO L131 PetriNetUnfolder]: For 2708/2708 co-relation queries the response was YES. [2022-11-20 09:34:10,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 1353 events. 0/1353 cut-off events. For 2708/2708 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3666 event pairs, 0 based on Foata normal form. 16/1369 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 09:34:10,878 INFO L137 encePairwiseOnDemand]: 1219/1225 looper letters, 101 selfloop transitions, 93 changer transitions 0/1150 dead transitions. [2022-11-20 09:34:10,878 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1247 places, 1150 transitions, 3871 flow [2022-11-20 09:34:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:34:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:34:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 90141 transitions. [2022-11-20 09:34:10,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791231073074391 [2022-11-20 09:34:10,920 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 90141 transitions. [2022-11-20 09:34:10,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 90141 transitions. [2022-11-20 09:34:10,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:10,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 90141 transitions. [2022-11-20 09:34:10,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 969.258064516129) internal successors, (90141), 93 states have internal predecessors, (90141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:11,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:11,055 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1225.0) internal successors, (115150), 94 states have internal predecessors, (115150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:11,056 INFO L175 Difference]: Start difference. First operand has 1155 places, 1044 transitions, 2635 flow. Second operand 93 states and 90141 transitions. [2022-11-20 09:34:11,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1247 places, 1150 transitions, 3871 flow [2022-11-20 09:34:11,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1229 places, 1150 transitions, 3783 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:34:11,081 INFO L231 Difference]: Finished difference. Result has 1246 places, 1093 transitions, 3269 flow [2022-11-20 09:34:11,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=1137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3269, PETRI_PLACES=1246, PETRI_TRANSITIONS=1093} [2022-11-20 09:34:11,082 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 164 predicate places. [2022-11-20 09:34:11,082 INFO L495 AbstractCegarLoop]: Abstraction has has 1246 places, 1093 transitions, 3269 flow [2022-11-20 09:34:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 969.8939393939394) internal successors, (64013), 66 states have internal predecessors, (64013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:11,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:11,088 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:11,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-11-20 09:34:11,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:11,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:11,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1708288287, now seen corresponding path program 1 times [2022-11-20 09:34:11,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471911769] [2022-11-20 09:34:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:11,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:13,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:13,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471911769] [2022-11-20 09:34:13,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471911769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:13,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361640742] [2022-11-20 09:34:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:13,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:13,653 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:13,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-20 09:34:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:34:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:15,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:19,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361640742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:19,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:19,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:34:19,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603100379] [2022-11-20 09:34:19,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:19,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:34:19,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:34:19,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:34:19,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 967 out of 1225 [2022-11-20 09:34:20,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1246 places, 1093 transitions, 3269 flow. Second operand has 130 states, 130 states have (on average 969.9461538461538) internal successors, (126093), 130 states have internal predecessors, (126093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:20,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:20,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 967 of 1225 [2022-11-20 09:34:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:24,646 INFO L130 PetriNetUnfolder]: 0/1298 cut-off events. [2022-11-20 09:34:24,646 INFO L131 PetriNetUnfolder]: For 3183/3183 co-relation queries the response was YES. [2022-11-20 09:34:24,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2352 conditions, 1298 events. 0/1298 cut-off events. For 3183/3183 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3325 event pairs, 0 based on Foata normal form. 5/1303 useless extension candidates. Maximal degree in co-relation 0. Up to 66 conditions per place. [2022-11-20 09:34:24,649 INFO L137 encePairwiseOnDemand]: 1220/1225 looper letters, 108 selfloop transitions, 106 changer transitions 0/1160 dead transitions. [2022-11-20 09:34:24,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1342 places, 1160 transitions, 4247 flow [2022-11-20 09:34:24,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-11-20 09:34:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2022-11-20 09:34:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 104655 transitions. [2022-11-20 09:34:24,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910430839002267 [2022-11-20 09:34:24,702 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 104655 transitions. [2022-11-20 09:34:24,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 104655 transitions. [2022-11-20 09:34:24,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:24,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 104655 transitions. [2022-11-20 09:34:24,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 969.0277777777778) internal successors, (104655), 108 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,907 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 1225.0) internal successors, (133525), 109 states have internal predecessors, (133525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,907 INFO L175 Difference]: Start difference. First operand has 1246 places, 1093 transitions, 3269 flow. Second operand 108 states and 104655 transitions. [2022-11-20 09:34:24,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1342 places, 1160 transitions, 4247 flow [2022-11-20 09:34:24,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1269 places, 1160 transitions, 3885 flow, removed 22 selfloop flow, removed 73 redundant places. [2022-11-20 09:34:24,940 INFO L231 Difference]: Finished difference. Result has 1269 places, 1094 transitions, 3249 flow [2022-11-20 09:34:24,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1225, PETRI_DIFFERENCE_MINUEND_FLOW=2925, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=988, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=3249, PETRI_PLACES=1269, PETRI_TRANSITIONS=1094} [2022-11-20 09:34:24,941 INFO L288 CegarLoopForPetriNet]: 1082 programPoint places, 187 predicate places. [2022-11-20 09:34:24,941 INFO L495 AbstractCegarLoop]: Abstraction has has 1269 places, 1094 transitions, 3249 flow [2022-11-20 09:34:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 969.9461538461538) internal successors, (126093), 130 states have internal predecessors, (126093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:24,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:24,958 INFO L209 CegarLoopForPetriNet]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:24,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-11-20 09:34:25,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-11-20 09:34:25,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1308242903, now seen corresponding path program 1 times [2022-11-20 09:34:25,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:25,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016676899] [2022-11-20 09:34:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:25,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:34:25,234 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:34:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:34:25,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:34:25,370 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:34:25,370 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:34:25,370 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:34:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2022-11-20 09:34:25,371 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:25,371 WARN L233 ceAbstractionStarter]: 35 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:34:25,371 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 36 thread instances. [2022-11-20 09:34:25,585 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:34:25,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1111 places, 1258 transitions, 3956 flow [2022-11-20 09:34:27,883 INFO L130 PetriNetUnfolder]: 364/2549 cut-off events. [2022-11-20 09:34:27,883 INFO L131 PetriNetUnfolder]: For 8400/8400 co-relation queries the response was YES. [2022-11-20 09:34:28,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3324 conditions, 2549 events. 364/2549 cut-off events. For 8400/8400 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9359 event pairs, 0 based on Foata normal form. 0/2111 useless extension candidates. Maximal degree in co-relation 3188. Up to 74 conditions per place. [2022-11-20 09:34:28,182 INFO L82 GeneralOperation]: Start removeDead. Operand has 1111 places, 1258 transitions, 3956 flow [2022-11-20 09:34:28,281 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1111 places, 1258 transitions, 3956 flow [2022-11-20 09:34:28,281 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:34:28,282 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:34:28,282 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:34:28,287 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:34:28,288 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:34:28,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:28,288 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] [2022-11-20 09:34:28,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:28,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1845321377, now seen corresponding path program 1 times [2022-11-20 09:34:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:28,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414158823] [2022-11-20 09:34:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:28,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:28,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414158823] [2022-11-20 09:34:28,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414158823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:34:28,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:34:28,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:34:28,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398322128] [2022-11-20 09:34:28,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:34:28,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:34:28,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:28,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:34:28,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:34:28,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1001 out of 1258 [2022-11-20 09:34:28,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:28,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:28,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1001 of 1258 [2022-11-20 09:34:28,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:30,957 INFO L130 PetriNetUnfolder]: 0/2148 cut-off events. [2022-11-20 09:34:30,957 INFO L131 PetriNetUnfolder]: For 9066/9066 co-relation queries the response was YES. [2022-11-20 09:34:30,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 2148 events. 0/2148 cut-off events. For 9066/9066 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 8804 event pairs, 0 based on Foata normal form. 3936/6010 useless extension candidates. Maximal degree in co-relation 0. Up to 37 conditions per place. [2022-11-20 09:34:30,961 INFO L137 encePairwiseOnDemand]: 1038/1258 looper letters, 36 selfloop transitions, 0 changer transitions 11/1037 dead transitions. [2022-11-20 09:34:30,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 3586 flow [2022-11-20 09:34:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:34:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:34:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2258 transitions. [2022-11-20 09:34:30,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8974562798092209 [2022-11-20 09:34:30,964 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2258 transitions. [2022-11-20 09:34:30,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2258 transitions. [2022-11-20 09:34:30,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:30,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2258 transitions. [2022-11-20 09:34:30,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1129.0) internal successors, (2258), 2 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:30,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:30,968 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1258.0) internal successors, (3774), 3 states have internal predecessors, (3774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:30,968 INFO L175 Difference]: Start difference. First operand has 1111 places, 1258 transitions, 3956 flow. Second operand 2 states and 2258 transitions. [2022-11-20 09:34:30,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 3586 flow [2022-11-20 09:34:30,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1111 places, 1037 transitions, 2326 flow, removed 630 selfloop flow, removed 0 redundant places. [2022-11-20 09:34:30,998 INFO L231 Difference]: Finished difference. Result has 1111 places, 1026 transitions, 2232 flow [2022-11-20 09:34:30,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=1110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1037, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2232, PETRI_PLACES=1111, PETRI_TRANSITIONS=1026} [2022-11-20 09:34:30,999 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 0 predicate places. [2022-11-20 09:34:30,999 INFO L495 AbstractCegarLoop]: Abstraction has has 1111 places, 1026 transitions, 2232 flow [2022-11-20 09:34:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1001.5) internal successors, (2003), 2 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:31,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:31,000 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] [2022-11-20 09:34:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2022-11-20 09:34:31,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:31,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 48370018, now seen corresponding path program 1 times [2022-11-20 09:34:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:31,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957486415] [2022-11-20 09:34:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:31,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:31,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:31,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957486415] [2022-11-20 09:34:31,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957486415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:34:31,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:34:31,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:34:31,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612146308] [2022-11-20 09:34:31,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:34:31,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:34:31,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:34:31,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:34:31,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 994 out of 1258 [2022-11-20 09:34:31,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:31,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:31,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 994 of 1258 [2022-11-20 09:34:31,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:33,125 INFO L130 PetriNetUnfolder]: 0/1730 cut-off events. [2022-11-20 09:34:33,125 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-20 09:34:33,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 1730 events. 0/1730 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6016 event pairs, 0 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 0. Up to 216 conditions per place. [2022-11-20 09:34:33,128 INFO L137 encePairwiseOnDemand]: 1255/1258 looper letters, 45 selfloop transitions, 2 changer transitions 0/1030 dead transitions. [2022-11-20 09:34:33,129 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 1030 transitions, 2334 flow [2022-11-20 09:34:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:34:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:34:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3030 transitions. [2022-11-20 09:34:33,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8028616852146264 [2022-11-20 09:34:33,132 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3030 transitions. [2022-11-20 09:34:33,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3030 transitions. [2022-11-20 09:34:33,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:33,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3030 transitions. [2022-11-20 09:34:33,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1010.0) internal successors, (3030), 3 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1258.0) internal successors, (5032), 4 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,137 INFO L175 Difference]: Start difference. First operand has 1111 places, 1026 transitions, 2232 flow. Second operand 3 states and 3030 transitions. [2022-11-20 09:34:33,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 1030 transitions, 2334 flow [2022-11-20 09:34:33,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 1030 transitions, 2334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:34:33,147 INFO L231 Difference]: Finished difference. Result has 1103 places, 1027 transitions, 2244 flow [2022-11-20 09:34:33,148 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2232, PETRI_DIFFERENCE_MINUEND_PLACES=1100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2244, PETRI_PLACES=1103, PETRI_TRANSITIONS=1027} [2022-11-20 09:34:33,148 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, -8 predicate places. [2022-11-20 09:34:33,148 INFO L495 AbstractCegarLoop]: Abstraction has has 1103 places, 1027 transitions, 2244 flow [2022-11-20 09:34:33,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 995.0) internal successors, (2985), 3 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:33,149 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:33,149 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] [2022-11-20 09:34:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2022-11-20 09:34:33,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1626774762, now seen corresponding path program 1 times [2022-11-20 09:34:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193345821] [2022-11-20 09:34:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:33,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193345821] [2022-11-20 09:34:33,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193345821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:33,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345339851] [2022-11-20 09:34:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:33,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:33,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:33,209 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:33,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-11-20 09:34:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:34:34,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:34,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:34,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345339851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:34,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:34,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:34:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872587073] [2022-11-20 09:34:34,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:34,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:34:34,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:34:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:34:34,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-20 09:34:34,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:34,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:34,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-20 09:34:34,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:36,678 INFO L130 PetriNetUnfolder]: 0/1708 cut-off events. [2022-11-20 09:34:36,678 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 09:34:36,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1708 events. 0/1708 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5877 event pairs, 0 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-20 09:34:36,683 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 46 selfloop transitions, 9 changer transitions 0/1037 dead transitions. [2022-11-20 09:34:36,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1111 places, 1037 transitions, 2376 flow [2022-11-20 09:34:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:34:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:34:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8994 transitions. [2022-11-20 09:34:36,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7943826179120297 [2022-11-20 09:34:36,691 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 8994 transitions. [2022-11-20 09:34:36,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 8994 transitions. [2022-11-20 09:34:36,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:36,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 8994 transitions. [2022-11-20 09:34:36,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 999.3333333333334) internal successors, (8994), 9 states have internal predecessors, (8994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:36,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:36,886 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1258.0) internal successors, (12580), 10 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:36,887 INFO L175 Difference]: Start difference. First operand has 1103 places, 1027 transitions, 2244 flow. Second operand 9 states and 8994 transitions. [2022-11-20 09:34:36,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1111 places, 1037 transitions, 2376 flow [2022-11-20 09:34:36,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1110 places, 1037 transitions, 2374 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:34:36,903 INFO L231 Difference]: Finished difference. Result has 1113 places, 1033 transitions, 2292 flow [2022-11-20 09:34:36,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=1102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2292, PETRI_PLACES=1113, PETRI_TRANSITIONS=1033} [2022-11-20 09:34:36,904 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 2 predicate places. [2022-11-20 09:34:36,904 INFO L495 AbstractCegarLoop]: Abstraction has has 1113 places, 1033 transitions, 2292 flow [2022-11-20 09:34:36,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 995.3) internal successors, (9953), 10 states have internal predecessors, (9953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:36,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:36,905 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:36,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:37,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:37,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1571594175, now seen corresponding path program 1 times [2022-11-20 09:34:37,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:37,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339608591] [2022-11-20 09:34:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:37,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339608591] [2022-11-20 09:34:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339608591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:37,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005760523] [2022-11-20 09:34:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:37,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:37,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:37,258 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:37,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-11-20 09:34:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:34:38,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:38,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:39,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005760523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:39,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:39,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:34:39,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236489570] [2022-11-20 09:34:39,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:39,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:34:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:34:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:34:39,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-20 09:34:39,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:39,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:39,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-20 09:34:39,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:41,653 INFO L130 PetriNetUnfolder]: 0/1664 cut-off events. [2022-11-20 09:34:41,653 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-11-20 09:34:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1664 events. 0/1664 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5564 event pairs, 0 based on Foata normal form. 4/1668 useless extension candidates. Maximal degree in co-relation 0. Up to 123 conditions per place. [2022-11-20 09:34:41,657 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 54 selfloop transitions, 21 changer transitions 0/1057 dead transitions. [2022-11-20 09:34:41,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1133 places, 1057 transitions, 2550 flow [2022-11-20 09:34:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:34:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:34:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20932 transitions. [2022-11-20 09:34:41,670 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7923385570444395 [2022-11-20 09:34:41,670 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 20932 transitions. [2022-11-20 09:34:41,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 20932 transitions. [2022-11-20 09:34:41,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:41,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 20932 transitions. [2022-11-20 09:34:41,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 996.7619047619048) internal successors, (20932), 21 states have internal predecessors, (20932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:41,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:41,707 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1258.0) internal successors, (27676), 22 states have internal predecessors, (27676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:41,707 INFO L175 Difference]: Start difference. First operand has 1113 places, 1033 transitions, 2292 flow. Second operand 21 states and 20932 transitions. [2022-11-20 09:34:41,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1133 places, 1057 transitions, 2550 flow [2022-11-20 09:34:41,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1132 places, 1057 transitions, 2536 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:34:41,720 INFO L231 Difference]: Finished difference. Result has 1137 places, 1046 transitions, 2416 flow [2022-11-20 09:34:41,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=1112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2416, PETRI_PLACES=1137, PETRI_TRANSITIONS=1046} [2022-11-20 09:34:41,721 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 26 predicate places. [2022-11-20 09:34:41,721 INFO L495 AbstractCegarLoop]: Abstraction has has 1137 places, 1046 transitions, 2416 flow [2022-11-20 09:34:41,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 995.6111111111111) internal successors, (17921), 18 states have internal predecessors, (17921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:41,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:41,723 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:41,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:41,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:41,924 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:41,924 INFO L85 PathProgramCache]: Analyzing trace with hash -649199965, now seen corresponding path program 1 times [2022-11-20 09:34:41,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:41,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882810714] [2022-11-20 09:34:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:41,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:42,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:42,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882810714] [2022-11-20 09:34:42,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882810714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:42,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013677488] [2022-11-20 09:34:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:42,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:42,164 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:42,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-11-20 09:34:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:43,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:34:43,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:43,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:44,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013677488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:44,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:44,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:34:44,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232175511] [2022-11-20 09:34:44,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:44,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:34:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:34:44,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:34:44,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-20 09:34:44,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:44,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:44,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-20 09:34:44,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:46,908 INFO L130 PetriNetUnfolder]: 0/1576 cut-off events. [2022-11-20 09:34:46,908 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2022-11-20 09:34:46,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1576 events. 0/1576 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5005 event pairs, 0 based on Foata normal form. 8/1584 useless extension candidates. Maximal degree in co-relation 0. Up to 91 conditions per place. [2022-11-20 09:34:46,911 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 70 selfloop transitions, 45 changer transitions 0/1097 dead transitions. [2022-11-20 09:34:46,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1181 places, 1097 transitions, 2962 flow [2022-11-20 09:34:46,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:34:46,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:34:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 44808 transitions. [2022-11-20 09:34:46,934 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7915209326974033 [2022-11-20 09:34:46,934 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 44808 transitions. [2022-11-20 09:34:46,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 44808 transitions. [2022-11-20 09:34:46,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:46,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 44808 transitions. [2022-11-20 09:34:46,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 995.7333333333333) internal successors, (44808), 45 states have internal predecessors, (44808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:46,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:47,006 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1258.0) internal successors, (57868), 46 states have internal predecessors, (57868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:47,006 INFO L175 Difference]: Start difference. First operand has 1137 places, 1046 transitions, 2416 flow. Second operand 45 states and 44808 transitions. [2022-11-20 09:34:47,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1181 places, 1097 transitions, 2962 flow [2022-11-20 09:34:47,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1175 places, 1097 transitions, 2922 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:34:47,022 INFO L231 Difference]: Finished difference. Result has 1184 places, 1071 transitions, 2694 flow [2022-11-20 09:34:47,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2392, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2694, PETRI_PLACES=1184, PETRI_TRANSITIONS=1071} [2022-11-20 09:34:47,023 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 73 predicate places. [2022-11-20 09:34:47,023 INFO L495 AbstractCegarLoop]: Abstraction has has 1184 places, 1071 transitions, 2694 flow [2022-11-20 09:34:47,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 995.7941176470588) internal successors, (33857), 34 states have internal predecessors, (33857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:47,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:47,026 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:47,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-11-20 09:34:47,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-11-20 09:34:47,227 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:47,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 506999703, now seen corresponding path program 1 times [2022-11-20 09:34:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956645892] [2022-11-20 09:34:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:47,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:47,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956645892] [2022-11-20 09:34:47,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956645892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596933408] [2022-11-20 09:34:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:47,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:47,842 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:47,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-11-20 09:34:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:49,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:34:49,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:34:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:49,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:34:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:50,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596933408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:34:50,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:34:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:34:50,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097058010] [2022-11-20 09:34:50,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:34:50,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:34:50,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:34:50,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:34:50,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:34:50,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-20 09:34:50,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1184 places, 1071 transitions, 2694 flow. Second operand has 66 states, 66 states have (on average 995.8939393939394) internal successors, (65729), 66 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:50,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:34:50,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-20 09:34:50,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:34:55,364 INFO L130 PetriNetUnfolder]: 0/1400 cut-off events. [2022-11-20 09:34:55,364 INFO L131 PetriNetUnfolder]: For 2829/2829 co-relation queries the response was YES. [2022-11-20 09:34:55,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2455 conditions, 1400 events. 0/1400 cut-off events. For 2829/2829 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3842 event pairs, 0 based on Foata normal form. 16/1416 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-20 09:34:55,366 INFO L137 encePairwiseOnDemand]: 1252/1258 looper letters, 102 selfloop transitions, 93 changer transitions 0/1177 dead transitions. [2022-11-20 09:34:55,366 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1276 places, 1177 transitions, 3932 flow [2022-11-20 09:34:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:34:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:34:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 92560 transitions. [2022-11-20 09:34:55,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911516829922902 [2022-11-20 09:34:55,404 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 92560 transitions. [2022-11-20 09:34:55,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 92560 transitions. [2022-11-20 09:34:55,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:34:55,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 92560 transitions. [2022-11-20 09:34:55,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 995.2688172043011) internal successors, (92560), 93 states have internal predecessors, (92560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:55,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1258.0) internal successors, (118252), 94 states have internal predecessors, (118252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:55,558 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1258.0) internal successors, (118252), 94 states have internal predecessors, (118252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:55,558 INFO L175 Difference]: Start difference. First operand has 1184 places, 1071 transitions, 2694 flow. Second operand 93 states and 92560 transitions. [2022-11-20 09:34:55,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1276 places, 1177 transitions, 3932 flow [2022-11-20 09:34:55,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1258 places, 1177 transitions, 3844 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:34:55,590 INFO L231 Difference]: Finished difference. Result has 1275 places, 1120 transitions, 3328 flow [2022-11-20 09:34:55,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=1166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1024, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3328, PETRI_PLACES=1275, PETRI_TRANSITIONS=1120} [2022-11-20 09:34:55,591 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 164 predicate places. [2022-11-20 09:34:55,591 INFO L495 AbstractCegarLoop]: Abstraction has has 1275 places, 1120 transitions, 3328 flow [2022-11-20 09:34:55,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 995.8939393939394) internal successors, (65729), 66 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:34:55,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:34:55,597 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:34:55,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-11-20 09:34:55,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-11-20 09:34:55,798 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:34:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:34:55,798 INFO L85 PathProgramCache]: Analyzing trace with hash 700169791, now seen corresponding path program 1 times [2022-11-20 09:34:55,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:34:55,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103038070] [2022-11-20 09:34:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:34:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:34:58,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:34:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103038070] [2022-11-20 09:34:58,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103038070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:34:58,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246830353] [2022-11-20 09:34:58,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:34:58,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:34:58,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:34:58,187 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:34:58,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-11-20 09:34:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:34:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:34:59,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:00,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:04,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246830353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:04,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:04,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:35:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790882217] [2022-11-20 09:35:04,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:04,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:35:04,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:35:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:35:04,411 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 993 out of 1258 [2022-11-20 09:35:04,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1275 places, 1120 transitions, 3328 flow. Second operand has 130 states, 130 states have (on average 995.9461538461538) internal successors, (129473), 130 states have internal predecessors, (129473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:04,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:04,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 993 of 1258 [2022-11-20 09:35:04,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:10,284 INFO L130 PetriNetUnfolder]: 0/1334 cut-off events. [2022-11-20 09:35:10,284 INFO L131 PetriNetUnfolder]: For 3680/3680 co-relation queries the response was YES. [2022-11-20 09:35:10,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 1334 events. 0/1334 cut-off events. For 3680/3680 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3423 event pairs, 0 based on Foata normal form. 6/1340 useless extension candidates. Maximal degree in co-relation 0. Up to 68 conditions per place. [2022-11-20 09:35:10,287 INFO L137 encePairwiseOnDemand]: 1253/1258 looper letters, 111 selfloop transitions, 109 changer transitions 0/1192 dead transitions. [2022-11-20 09:35:10,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1374 places, 1192 transitions, 4372 flow [2022-11-20 09:35:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-20 09:35:10,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-20 09:35:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 110449 transitions. [2022-11-20 09:35:10,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7909666423179936 [2022-11-20 09:35:10,347 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 110449 transitions. [2022-11-20 09:35:10,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 110449 transitions. [2022-11-20 09:35:10,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:10,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 110449 transitions. [2022-11-20 09:35:10,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 995.0360360360361) internal successors, (110449), 111 states have internal predecessors, (110449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:10,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 1258.0) internal successors, (140896), 112 states have internal predecessors, (140896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:10,553 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 1258.0) internal successors, (140896), 112 states have internal predecessors, (140896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:10,553 INFO L175 Difference]: Start difference. First operand has 1275 places, 1120 transitions, 3328 flow. Second operand 111 states and 110449 transitions. [2022-11-20 09:35:10,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1374 places, 1192 transitions, 4372 flow [2022-11-20 09:35:10,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1301 places, 1192 transitions, 4000 flow, removed 23 selfloop flow, removed 73 redundant places. [2022-11-20 09:35:10,581 INFO L231 Difference]: Finished difference. Result has 1301 places, 1124 transitions, 3342 flow [2022-11-20 09:35:10,581 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1258, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=1191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=3342, PETRI_PLACES=1301, PETRI_TRANSITIONS=1124} [2022-11-20 09:35:10,582 INFO L288 CegarLoopForPetriNet]: 1111 programPoint places, 190 predicate places. [2022-11-20 09:35:10,582 INFO L495 AbstractCegarLoop]: Abstraction has has 1301 places, 1124 transitions, 3342 flow [2022-11-20 09:35:10,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 995.9461538461538) internal successors, (129473), 130 states have internal predecessors, (129473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:10,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:10,600 INFO L209 CegarLoopForPetriNet]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:10,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-11-20 09:35:10,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:10,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash 374453632, now seen corresponding path program 1 times [2022-11-20 09:35:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151874753] [2022-11-20 09:35:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:10,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:35:10,884 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:35:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:35:11,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:35:11,174 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:35:11,174 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:35:11,174 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:35:11,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2022-11-20 09:35:11,174 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:11,175 WARN L233 ceAbstractionStarter]: 36 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:35:11,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 37 thread instances. [2022-11-20 09:35:11,309 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:35:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1140 places, 1291 transitions, 4099 flow [2022-11-20 09:35:14,159 INFO L130 PetriNetUnfolder]: 374/2618 cut-off events. [2022-11-20 09:35:14,159 INFO L131 PetriNetUnfolder]: For 9102/9102 co-relation queries the response was YES. [2022-11-20 09:35:14,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3433 conditions, 2618 events. 374/2618 cut-off events. For 9102/9102 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9579 event pairs, 0 based on Foata normal form. 0/2168 useless extension candidates. Maximal degree in co-relation 3296. Up to 76 conditions per place. [2022-11-20 09:35:14,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 1140 places, 1291 transitions, 4099 flow [2022-11-20 09:35:14,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1140 places, 1291 transitions, 4099 flow [2022-11-20 09:35:14,631 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:35:14,631 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:35:14,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:35:14,636 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:35:14,636 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:35:14,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:14,637 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] [2022-11-20 09:35:14,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:14,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1192078111, now seen corresponding path program 1 times [2022-11-20 09:35:14,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:14,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119027689] [2022-11-20 09:35:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:14,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:14,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119027689] [2022-11-20 09:35:14,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119027689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:35:14,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:35:14,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:35:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915411983] [2022-11-20 09:35:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:35:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:14,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:35:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:35:14,674 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1027 out of 1291 [2022-11-20 09:35:14,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1140 places, 1291 transitions, 4099 flow. Second operand has 2 states, 2 states have (on average 1027.5) internal successors, (2055), 2 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:14,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:14,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1027 of 1291 [2022-11-20 09:35:14,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:17,414 INFO L130 PetriNetUnfolder]: 0/2206 cut-off events. [2022-11-20 09:35:17,415 INFO L131 PetriNetUnfolder]: For 9805/9805 co-relation queries the response was YES. [2022-11-20 09:35:17,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 2206 events. 0/2206 cut-off events. For 9805/9805 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 9192 event pairs, 0 based on Foata normal form. 4156/6286 useless extension candidates. Maximal degree in co-relation 0. Up to 38 conditions per place. [2022-11-20 09:35:17,421 INFO L137 encePairwiseOnDemand]: 1065/1291 looper letters, 37 selfloop transitions, 0 changer transitions 11/1064 dead transitions. [2022-11-20 09:35:17,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 1064 transitions, 3719 flow [2022-11-20 09:35:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:35:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:35:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2317 transitions. [2022-11-20 09:35:17,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8973663826491092 [2022-11-20 09:35:17,425 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2317 transitions. [2022-11-20 09:35:17,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2317 transitions. [2022-11-20 09:35:17,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:17,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2317 transitions. [2022-11-20 09:35:17,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1158.5) internal successors, (2317), 2 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1291.0) internal successors, (3873), 3 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,429 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1291.0) internal successors, (3873), 3 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,429 INFO L175 Difference]: Start difference. First operand has 1140 places, 1291 transitions, 4099 flow. Second operand 2 states and 2317 transitions. [2022-11-20 09:35:17,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1140 places, 1064 transitions, 3719 flow [2022-11-20 09:35:17,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1140 places, 1064 transitions, 2387 flow, removed 666 selfloop flow, removed 0 redundant places. [2022-11-20 09:35:17,464 INFO L231 Difference]: Finished difference. Result has 1140 places, 1053 transitions, 2291 flow [2022-11-20 09:35:17,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2313, PETRI_DIFFERENCE_MINUEND_PLACES=1139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2291, PETRI_PLACES=1140, PETRI_TRANSITIONS=1053} [2022-11-20 09:35:17,465 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 0 predicate places. [2022-11-20 09:35:17,465 INFO L495 AbstractCegarLoop]: Abstraction has has 1140 places, 1053 transitions, 2291 flow [2022-11-20 09:35:17,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1027.5) internal successors, (2055), 2 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:17,466 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] [2022-11-20 09:35:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2022-11-20 09:35:17,466 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1305937826, now seen corresponding path program 1 times [2022-11-20 09:35:17,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307531681] [2022-11-20 09:35:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:17,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:17,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307531681] [2022-11-20 09:35:17,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307531681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:35:17,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:35:17,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:35:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925963661] [2022-11-20 09:35:17,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:35:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:35:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:17,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:35:17,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:35:17,512 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1020 out of 1291 [2022-11-20 09:35:17,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1140 places, 1053 transitions, 2291 flow. Second operand has 3 states, 3 states have (on average 1021.0) internal successors, (3063), 3 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:17,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:17,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1020 of 1291 [2022-11-20 09:35:17,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:19,818 INFO L130 PetriNetUnfolder]: 0/1777 cut-off events. [2022-11-20 09:35:19,819 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-20 09:35:19,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 1777 events. 0/1777 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6151 event pairs, 0 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 0. Up to 222 conditions per place. [2022-11-20 09:35:19,823 INFO L137 encePairwiseOnDemand]: 1288/1291 looper letters, 46 selfloop transitions, 2 changer transitions 0/1057 dead transitions. [2022-11-20 09:35:19,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1131 places, 1057 transitions, 2395 flow [2022-11-20 09:35:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:35:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:35:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3109 transitions. [2022-11-20 09:35:19,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8027368964626904 [2022-11-20 09:35:19,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3109 transitions. [2022-11-20 09:35:19,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3109 transitions. [2022-11-20 09:35:19,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:19,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3109 transitions. [2022-11-20 09:35:19,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1036.3333333333333) internal successors, (3109), 3 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:19,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:19,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1291.0) internal successors, (5164), 4 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:19,834 INFO L175 Difference]: Start difference. First operand has 1140 places, 1053 transitions, 2291 flow. Second operand 3 states and 3109 transitions. [2022-11-20 09:35:19,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1131 places, 1057 transitions, 2395 flow [2022-11-20 09:35:19,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1131 places, 1057 transitions, 2395 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:35:19,846 INFO L231 Difference]: Finished difference. Result has 1132 places, 1054 transitions, 2303 flow [2022-11-20 09:35:19,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=1129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2303, PETRI_PLACES=1132, PETRI_TRANSITIONS=1054} [2022-11-20 09:35:19,847 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, -8 predicate places. [2022-11-20 09:35:19,847 INFO L495 AbstractCegarLoop]: Abstraction has has 1132 places, 1054 transitions, 2303 flow [2022-11-20 09:35:19,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1021.0) internal successors, (3063), 3 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:19,848 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:19,848 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] [2022-11-20 09:35:19,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2022-11-20 09:35:19,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash 78512214, now seen corresponding path program 1 times [2022-11-20 09:35:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73069951] [2022-11-20 09:35:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:19,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:19,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73069951] [2022-11-20 09:35:19,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73069951] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:19,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564890275] [2022-11-20 09:35:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:19,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:19,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:19,908 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:19,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-11-20 09:35:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:35:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:21,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564890275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:21,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:35:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329285972] [2022-11-20 09:35:21,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:21,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:35:21,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:35:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:35:21,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-20 09:35:21,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1132 places, 1054 transitions, 2303 flow. Second operand has 10 states, 10 states have (on average 1021.3) internal successors, (10213), 10 states have internal predecessors, (10213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:21,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:21,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-20 09:35:21,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:24,257 INFO L130 PetriNetUnfolder]: 0/1755 cut-off events. [2022-11-20 09:35:24,257 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-20 09:35:24,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 1755 events. 0/1755 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6055 event pairs, 0 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-20 09:35:24,262 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 47 selfloop transitions, 9 changer transitions 0/1064 dead transitions. [2022-11-20 09:35:24,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1140 places, 1064 transitions, 2437 flow [2022-11-20 09:35:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:35:24,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:35:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9229 transitions. [2022-11-20 09:35:24,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7943024356657199 [2022-11-20 09:35:24,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9229 transitions. [2022-11-20 09:35:24,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9229 transitions. [2022-11-20 09:35:24,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:24,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9229 transitions. [2022-11-20 09:35:24,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1025.4444444444443) internal successors, (9229), 9 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:24,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1291.0) internal successors, (12910), 10 states have internal predecessors, (12910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:24,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1291.0) internal successors, (12910), 10 states have internal predecessors, (12910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:24,287 INFO L175 Difference]: Start difference. First operand has 1132 places, 1054 transitions, 2303 flow. Second operand 9 states and 9229 transitions. [2022-11-20 09:35:24,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1140 places, 1064 transitions, 2437 flow [2022-11-20 09:35:24,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1139 places, 1064 transitions, 2435 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:35:24,301 INFO L231 Difference]: Finished difference. Result has 1142 places, 1060 transitions, 2351 flow [2022-11-20 09:35:24,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=1131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2351, PETRI_PLACES=1142, PETRI_TRANSITIONS=1060} [2022-11-20 09:35:24,301 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 2 predicate places. [2022-11-20 09:35:24,302 INFO L495 AbstractCegarLoop]: Abstraction has has 1142 places, 1060 transitions, 2351 flow [2022-11-20 09:35:24,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1021.3) internal successors, (10213), 10 states have internal predecessors, (10213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:24,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:24,303 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:24,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-11-20 09:35:24,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:24,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:24,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1176958079, now seen corresponding path program 1 times [2022-11-20 09:35:24,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:24,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184475708] [2022-11-20 09:35:24,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:24,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:24,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:24,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184475708] [2022-11-20 09:35:24,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184475708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:24,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046661915] [2022-11-20 09:35:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:24,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:24,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:24,622 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:24,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-11-20 09:35:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:26,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:35:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:26,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:26,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046661915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:26,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:26,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:35:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975924193] [2022-11-20 09:35:26,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:35:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:26,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:35:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:35:26,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-20 09:35:26,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1142 places, 1060 transitions, 2351 flow. Second operand has 18 states, 18 states have (on average 1021.6111111111111) internal successors, (18389), 18 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:26,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:26,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-20 09:35:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:29,021 INFO L130 PetriNetUnfolder]: 0/1711 cut-off events. [2022-11-20 09:35:29,021 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-20 09:35:29,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1711 events. 0/1711 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5734 event pairs, 0 based on Foata normal form. 4/1715 useless extension candidates. Maximal degree in co-relation 0. Up to 127 conditions per place. [2022-11-20 09:35:29,026 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 55 selfloop transitions, 21 changer transitions 0/1084 dead transitions. [2022-11-20 09:35:29,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1162 places, 1084 transitions, 2611 flow [2022-11-20 09:35:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:35:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:35:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21479 transitions. [2022-11-20 09:35:29,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7922614436944414 [2022-11-20 09:35:29,041 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 21479 transitions. [2022-11-20 09:35:29,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 21479 transitions. [2022-11-20 09:35:29,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:29,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 21479 transitions. [2022-11-20 09:35:29,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1022.8095238095239) internal successors, (21479), 21 states have internal predecessors, (21479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1291.0) internal successors, (28402), 22 states have internal predecessors, (28402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,081 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1291.0) internal successors, (28402), 22 states have internal predecessors, (28402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,081 INFO L175 Difference]: Start difference. First operand has 1142 places, 1060 transitions, 2351 flow. Second operand 21 states and 21479 transitions. [2022-11-20 09:35:29,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1162 places, 1084 transitions, 2611 flow [2022-11-20 09:35:29,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1161 places, 1084 transitions, 2597 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:35:29,095 INFO L231 Difference]: Finished difference. Result has 1166 places, 1073 transitions, 2475 flow [2022-11-20 09:35:29,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=1141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1060, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2475, PETRI_PLACES=1166, PETRI_TRANSITIONS=1073} [2022-11-20 09:35:29,096 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 26 predicate places. [2022-11-20 09:35:29,096 INFO L495 AbstractCegarLoop]: Abstraction has has 1166 places, 1073 transitions, 2475 flow [2022-11-20 09:35:29,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1021.6111111111111) internal successors, (18389), 18 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:29,099 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:29,099 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:29,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-11-20 09:35:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-11-20 09:35:29,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:29,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2065906205, now seen corresponding path program 1 times [2022-11-20 09:35:29,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771144751] [2022-11-20 09:35:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:29,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771144751] [2022-11-20 09:35:29,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771144751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:29,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555248946] [2022-11-20 09:35:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:29,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:29,568 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:29,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-11-20 09:35:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:31,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:35:31,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:31,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:31,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555248946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:31,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:31,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:35:31,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670326363] [2022-11-20 09:35:31,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:31,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:35:31,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:35:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:35:31,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-20 09:35:31,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1166 places, 1073 transitions, 2475 flow. Second operand has 34 states, 34 states have (on average 1021.7941176470588) internal successors, (34741), 34 states have internal predecessors, (34741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:31,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:31,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-20 09:35:31,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:35,263 INFO L130 PetriNetUnfolder]: 0/1623 cut-off events. [2022-11-20 09:35:35,263 INFO L131 PetriNetUnfolder]: For 870/870 co-relation queries the response was YES. [2022-11-20 09:35:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 1623 events. 0/1623 cut-off events. For 870/870 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5179 event pairs, 0 based on Foata normal form. 8/1631 useless extension candidates. Maximal degree in co-relation 0. Up to 95 conditions per place. [2022-11-20 09:35:35,267 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 71 selfloop transitions, 45 changer transitions 0/1124 dead transitions. [2022-11-20 09:35:35,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1210 places, 1124 transitions, 3023 flow [2022-11-20 09:35:35,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:35:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:35:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45979 transitions. [2022-11-20 09:35:35,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.79144504690593 [2022-11-20 09:35:35,292 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 45979 transitions. [2022-11-20 09:35:35,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 45979 transitions. [2022-11-20 09:35:35,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:35,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 45979 transitions. [2022-11-20 09:35:35,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1021.7555555555556) internal successors, (45979), 45 states have internal predecessors, (45979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:35,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1291.0) internal successors, (59386), 46 states have internal predecessors, (59386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:35,376 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1291.0) internal successors, (59386), 46 states have internal predecessors, (59386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:35,377 INFO L175 Difference]: Start difference. First operand has 1166 places, 1073 transitions, 2475 flow. Second operand 45 states and 45979 transitions. [2022-11-20 09:35:35,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1210 places, 1124 transitions, 3023 flow [2022-11-20 09:35:35,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1204 places, 1124 transitions, 2983 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:35:35,401 INFO L231 Difference]: Finished difference. Result has 1213 places, 1098 transitions, 2753 flow [2022-11-20 09:35:35,402 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2753, PETRI_PLACES=1213, PETRI_TRANSITIONS=1098} [2022-11-20 09:35:35,402 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 73 predicate places. [2022-11-20 09:35:35,403 INFO L495 AbstractCegarLoop]: Abstraction has has 1213 places, 1098 transitions, 2753 flow [2022-11-20 09:35:35,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1021.7941176470588) internal successors, (34741), 34 states have internal predecessors, (34741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:35,407 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:35,407 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:35,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-11-20 09:35:35,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-11-20 09:35:35,608 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1156920023, now seen corresponding path program 1 times [2022-11-20 09:35:35,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:35,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475908446] [2022-11-20 09:35:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:36,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475908446] [2022-11-20 09:35:36,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475908446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:36,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469807671] [2022-11-20 09:35:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:36,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:36,445 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:36,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-11-20 09:35:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:35:38,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:38,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:39,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469807671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:39,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:39,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:35:39,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456670445] [2022-11-20 09:35:39,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:39,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:35:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:35:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:35:39,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-20 09:35:39,927 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1213 places, 1098 transitions, 2753 flow. Second operand has 66 states, 66 states have (on average 1021.8939393939394) internal successors, (67445), 66 states have internal predecessors, (67445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:39,927 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:39,928 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-20 09:35:39,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:44,219 INFO L130 PetriNetUnfolder]: 0/1447 cut-off events. [2022-11-20 09:35:44,219 INFO L131 PetriNetUnfolder]: For 2950/2950 co-relation queries the response was YES. [2022-11-20 09:35:44,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2545 conditions, 1447 events. 0/1447 cut-off events. For 2950/2950 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4006 event pairs, 0 based on Foata normal form. 16/1463 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-20 09:35:44,223 INFO L137 encePairwiseOnDemand]: 1285/1291 looper letters, 103 selfloop transitions, 93 changer transitions 0/1204 dead transitions. [2022-11-20 09:35:44,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1305 places, 1204 transitions, 3993 flow [2022-11-20 09:35:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:35:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:35:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94979 transitions. [2022-11-20 09:35:44,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7910763515820861 [2022-11-20 09:35:44,264 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 94979 transitions. [2022-11-20 09:35:44,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 94979 transitions. [2022-11-20 09:35:44,276 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:44,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 94979 transitions. [2022-11-20 09:35:44,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1021.2795698924731) internal successors, (94979), 93 states have internal predecessors, (94979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:44,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1291.0) internal successors, (121354), 94 states have internal predecessors, (121354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:44,404 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1291.0) internal successors, (121354), 94 states have internal predecessors, (121354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:44,404 INFO L175 Difference]: Start difference. First operand has 1213 places, 1098 transitions, 2753 flow. Second operand 93 states and 94979 transitions. [2022-11-20 09:35:44,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1305 places, 1204 transitions, 3993 flow [2022-11-20 09:35:44,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1287 places, 1204 transitions, 3905 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:35:44,441 INFO L231 Difference]: Finished difference. Result has 1304 places, 1147 transitions, 3387 flow [2022-11-20 09:35:44,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=1195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1098, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3387, PETRI_PLACES=1304, PETRI_TRANSITIONS=1147} [2022-11-20 09:35:44,442 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 164 predicate places. [2022-11-20 09:35:44,442 INFO L495 AbstractCegarLoop]: Abstraction has has 1304 places, 1147 transitions, 3387 flow [2022-11-20 09:35:44,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1021.8939393939394) internal successors, (67445), 66 states have internal predecessors, (67445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:44,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:44,450 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:44,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-11-20 09:35:44,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2022-11-20 09:35:44,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:44,651 INFO L85 PathProgramCache]: Analyzing trace with hash 591736191, now seen corresponding path program 1 times [2022-11-20 09:35:44,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:44,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302061036] [2022-11-20 09:35:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:44,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:47,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302061036] [2022-11-20 09:35:47,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302061036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:35:47,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924129660] [2022-11-20 09:35:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:47,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:35:47,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:35:47,083 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:35:47,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-11-20 09:35:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:35:48,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:35:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:35:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:49,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:35:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:35:52,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924129660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:52,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:35:52,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:35:52,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951443010] [2022-11-20 09:35:52,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:35:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:35:52,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:35:52,733 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1019 out of 1291 [2022-11-20 09:35:52,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1304 places, 1147 transitions, 3387 flow. Second operand has 130 states, 130 states have (on average 1021.9461538461538) internal successors, (132853), 130 states have internal predecessors, (132853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:52,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:35:52,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1019 of 1291 [2022-11-20 09:35:52,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:35:57,570 INFO L130 PetriNetUnfolder]: 0/1370 cut-off events. [2022-11-20 09:35:57,571 INFO L131 PetriNetUnfolder]: For 4177/4177 co-relation queries the response was YES. [2022-11-20 09:35:57,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 1370 events. 0/1370 cut-off events. For 4177/4177 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3521 event pairs, 0 based on Foata normal form. 7/1377 useless extension candidates. Maximal degree in co-relation 0. Up to 70 conditions per place. [2022-11-20 09:35:57,573 INFO L137 encePairwiseOnDemand]: 1286/1291 looper letters, 114 selfloop transitions, 112 changer transitions 0/1224 dead transitions. [2022-11-20 09:35:57,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1406 places, 1224 transitions, 4497 flow [2022-11-20 09:35:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-11-20 09:35:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2022-11-20 09:35:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116399 transitions. [2022-11-20 09:35:57,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908937719977713 [2022-11-20 09:35:57,623 INFO L72 ComplementDD]: Start complementDD. Operand 114 states and 116399 transitions. [2022-11-20 09:35:57,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 116399 transitions. [2022-11-20 09:35:57,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:35:57,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 114 states and 116399 transitions. [2022-11-20 09:35:57,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 115 states, 114 states have (on average 1021.0438596491229) internal successors, (116399), 114 states have internal predecessors, (116399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:57,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 115 states, 115 states have (on average 1291.0) internal successors, (148465), 115 states have internal predecessors, (148465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:57,787 INFO L81 ComplementDD]: Finished complementDD. Result has 115 states, 115 states have (on average 1291.0) internal successors, (148465), 115 states have internal predecessors, (148465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:57,787 INFO L175 Difference]: Start difference. First operand has 1304 places, 1147 transitions, 3387 flow. Second operand 114 states and 116399 transitions. [2022-11-20 09:35:57,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1406 places, 1224 transitions, 4497 flow [2022-11-20 09:35:57,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1333 places, 1224 transitions, 4115 flow, removed 24 selfloop flow, removed 73 redundant places. [2022-11-20 09:35:57,809 INFO L231 Difference]: Finished difference. Result has 1333 places, 1154 transitions, 3435 flow [2022-11-20 09:35:57,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1291, PETRI_DIFFERENCE_MINUEND_FLOW=3043, PETRI_DIFFERENCE_MINUEND_PLACES=1220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_STATES=114, PETRI_FLOW=3435, PETRI_PLACES=1333, PETRI_TRANSITIONS=1154} [2022-11-20 09:35:57,810 INFO L288 CegarLoopForPetriNet]: 1140 programPoint places, 193 predicate places. [2022-11-20 09:35:57,810 INFO L495 AbstractCegarLoop]: Abstraction has has 1333 places, 1154 transitions, 3435 flow [2022-11-20 09:35:57,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1021.9461538461538) internal successors, (132853), 130 states have internal predecessors, (132853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:35:57,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:35:57,824 INFO L209 CegarLoopForPetriNet]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:57,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-11-20 09:35:58,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-11-20 09:35:58,025 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:35:58,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:35:58,025 INFO L85 PathProgramCache]: Analyzing trace with hash -236669160, now seen corresponding path program 1 times [2022-11-20 09:35:58,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:35:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353049248] [2022-11-20 09:35:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:35:58,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:35:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:35:58,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:35:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:35:58,292 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:35:58,292 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:35:58,292 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:35:58,292 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:35:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2022-11-20 09:35:58,293 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:35:58,293 WARN L233 ceAbstractionStarter]: 37 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:35:58,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 38 thread instances. [2022-11-20 09:35:58,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:35:58,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1169 places, 1324 transitions, 4244 flow [2022-11-20 09:36:00,929 INFO L130 PetriNetUnfolder]: 384/2687 cut-off events. [2022-11-20 09:36:00,929 INFO L131 PetriNetUnfolder]: For 9842/9842 co-relation queries the response was YES. [2022-11-20 09:36:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 2687 events. 384/2687 cut-off events. For 9842/9842 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 9859 event pairs, 0 based on Foata normal form. 0/2225 useless extension candidates. Maximal degree in co-relation 3405. Up to 78 conditions per place. [2022-11-20 09:36:01,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 1169 places, 1324 transitions, 4244 flow [2022-11-20 09:36:01,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1169 places, 1324 transitions, 4244 flow [2022-11-20 09:36:01,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:36:01,346 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:36:01,346 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:36:01,350 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:36:01,350 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:36:01,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:01,350 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] [2022-11-20 09:36:01,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1805324831, now seen corresponding path program 1 times [2022-11-20 09:36:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:01,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855511886] [2022-11-20 09:36:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855511886] [2022-11-20 09:36:01,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855511886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:01,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:01,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:36:01,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282405226] [2022-11-20 09:36:01,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:01,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:36:01,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:36:01,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:36:01,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1053 out of 1324 [2022-11-20 09:36:01,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1169 places, 1324 transitions, 4244 flow. Second operand has 2 states, 2 states have (on average 1053.5) internal successors, (2107), 2 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:01,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:01,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1053 of 1324 [2022-11-20 09:36:01,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:03,369 INFO L130 PetriNetUnfolder]: 0/2264 cut-off events. [2022-11-20 09:36:03,369 INFO L131 PetriNetUnfolder]: For 10583/10583 co-relation queries the response was YES. [2022-11-20 09:36:03,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3159 conditions, 2264 events. 0/2264 cut-off events. For 10583/10583 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9298 event pairs, 0 based on Foata normal form. 4382/6568 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2022-11-20 09:36:03,376 INFO L137 encePairwiseOnDemand]: 1092/1324 looper letters, 38 selfloop transitions, 0 changer transitions 11/1091 dead transitions. [2022-11-20 09:36:03,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 1091 transitions, 3854 flow [2022-11-20 09:36:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:36:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:36:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2376 transitions. [2022-11-20 09:36:03,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8972809667673716 [2022-11-20 09:36:03,378 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2376 transitions. [2022-11-20 09:36:03,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2376 transitions. [2022-11-20 09:36:03,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:03,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2376 transitions. [2022-11-20 09:36:03,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1188.0) internal successors, (2376), 2 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:03,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1324.0) internal successors, (3972), 3 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:03,382 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1324.0) internal successors, (3972), 3 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:03,382 INFO L175 Difference]: Start difference. First operand has 1169 places, 1324 transitions, 4244 flow. Second operand 2 states and 2376 transitions. [2022-11-20 09:36:03,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1169 places, 1091 transitions, 3854 flow [2022-11-20 09:36:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1169 places, 1091 transitions, 2448 flow, removed 703 selfloop flow, removed 0 redundant places. [2022-11-20 09:36:03,429 INFO L231 Difference]: Finished difference. Result has 1169 places, 1080 transitions, 2350 flow [2022-11-20 09:36:03,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=1168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2350, PETRI_PLACES=1169, PETRI_TRANSITIONS=1080} [2022-11-20 09:36:03,430 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 0 predicate places. [2022-11-20 09:36:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 1169 places, 1080 transitions, 2350 flow [2022-11-20 09:36:03,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1053.5) internal successors, (2107), 2 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:03,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:03,430 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] [2022-11-20 09:36:03,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2022-11-20 09:36:03,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:03,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 692691106, now seen corresponding path program 1 times [2022-11-20 09:36:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:03,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873332903] [2022-11-20 09:36:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873332903] [2022-11-20 09:36:03,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873332903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:03,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:03,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:03,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846844478] [2022-11-20 09:36:03,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:03,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1046 out of 1324 [2022-11-20 09:36:03,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1169 places, 1080 transitions, 2350 flow. Second operand has 3 states, 3 states have (on average 1047.0) internal successors, (3141), 3 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:03,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:03,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1046 of 1324 [2022-11-20 09:36:03,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:05,017 INFO L130 PetriNetUnfolder]: 0/1824 cut-off events. [2022-11-20 09:36:05,017 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-20 09:36:05,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2211 conditions, 1824 events. 0/1824 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6356 event pairs, 0 based on Foata normal form. 0/1786 useless extension candidates. Maximal degree in co-relation 0. Up to 228 conditions per place. [2022-11-20 09:36:05,021 INFO L137 encePairwiseOnDemand]: 1321/1324 looper letters, 47 selfloop transitions, 2 changer transitions 0/1084 dead transitions. [2022-11-20 09:36:05,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1160 places, 1084 transitions, 2456 flow [2022-11-20 09:36:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:36:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:36:05,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3188 transitions. [2022-11-20 09:36:05,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8026183282980867 [2022-11-20 09:36:05,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3188 transitions. [2022-11-20 09:36:05,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3188 transitions. [2022-11-20 09:36:05,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:05,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3188 transitions. [2022-11-20 09:36:05,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1062.6666666666667) internal successors, (3188), 3 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:05,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1324.0) internal successors, (5296), 4 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:05,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1324.0) internal successors, (5296), 4 states have internal predecessors, (5296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:05,028 INFO L175 Difference]: Start difference. First operand has 1169 places, 1080 transitions, 2350 flow. Second operand 3 states and 3188 transitions. [2022-11-20 09:36:05,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1160 places, 1084 transitions, 2456 flow [2022-11-20 09:36:05,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1160 places, 1084 transitions, 2456 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:36:05,038 INFO L231 Difference]: Finished difference. Result has 1161 places, 1081 transitions, 2362 flow [2022-11-20 09:36:05,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=1158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1080, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2362, PETRI_PLACES=1161, PETRI_TRANSITIONS=1081} [2022-11-20 09:36:05,038 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, -8 predicate places. [2022-11-20 09:36:05,038 INFO L495 AbstractCegarLoop]: Abstraction has has 1161 places, 1081 transitions, 2362 flow [2022-11-20 09:36:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1047.0) internal successors, (3141), 3 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:05,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:05,039 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] [2022-11-20 09:36:05,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2022-11-20 09:36:05,039 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:05,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1318939402, now seen corresponding path program 1 times [2022-11-20 09:36:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124659151] [2022-11-20 09:36:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:05,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124659151] [2022-11-20 09:36:05,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124659151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:05,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767209725] [2022-11-20 09:36:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:05,092 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:05,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-20 09:36:06,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:06,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:36:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:06,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:06,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767209725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:06,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:06,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:36:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966203008] [2022-11-20 09:36:06,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:06,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:06,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:06,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-20 09:36:06,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1161 places, 1081 transitions, 2362 flow. Second operand has 10 states, 10 states have (on average 1047.3) internal successors, (10473), 10 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:06,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:06,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-20 09:36:06,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:08,434 INFO L130 PetriNetUnfolder]: 0/1802 cut-off events. [2022-11-20 09:36:08,434 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-20 09:36:08,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2303 conditions, 1802 events. 0/1802 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6188 event pairs, 0 based on Foata normal form. 2/1804 useless extension candidates. Maximal degree in co-relation 0. Up to 147 conditions per place. [2022-11-20 09:36:08,438 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 48 selfloop transitions, 9 changer transitions 0/1091 dead transitions. [2022-11-20 09:36:08,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1169 places, 1091 transitions, 2498 flow [2022-11-20 09:36:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:36:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9464 transitions. [2022-11-20 09:36:08,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7942262504196039 [2022-11-20 09:36:08,444 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9464 transitions. [2022-11-20 09:36:08,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9464 transitions. [2022-11-20 09:36:08,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:08,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9464 transitions. [2022-11-20 09:36:08,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1051.5555555555557) internal successors, (9464), 9 states have internal predecessors, (9464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:08,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1324.0) internal successors, (13240), 10 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:08,457 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1324.0) internal successors, (13240), 10 states have internal predecessors, (13240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:08,457 INFO L175 Difference]: Start difference. First operand has 1161 places, 1081 transitions, 2362 flow. Second operand 9 states and 9464 transitions. [2022-11-20 09:36:08,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1169 places, 1091 transitions, 2498 flow [2022-11-20 09:36:08,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1168 places, 1091 transitions, 2496 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:36:08,467 INFO L231 Difference]: Finished difference. Result has 1171 places, 1087 transitions, 2410 flow [2022-11-20 09:36:08,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=1160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1075, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2410, PETRI_PLACES=1171, PETRI_TRANSITIONS=1087} [2022-11-20 09:36:08,468 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 2 predicate places. [2022-11-20 09:36:08,468 INFO L495 AbstractCegarLoop]: Abstraction has has 1171 places, 1087 transitions, 2410 flow [2022-11-20 09:36:08,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1047.3) internal successors, (10473), 10 states have internal predecessors, (10473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:08,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:08,470 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:08,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:08,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:08,671 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:08,671 INFO L85 PathProgramCache]: Analyzing trace with hash 600932193, now seen corresponding path program 1 times [2022-11-20 09:36:08,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:08,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821302963] [2022-11-20 09:36:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:08,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821302963] [2022-11-20 09:36:08,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821302963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076676950] [2022-11-20 09:36:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:08,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:08,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:08,754 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:08,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-11-20 09:36:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:10,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:36:10,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:10,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076676950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:10,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:10,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:36:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492791251] [2022-11-20 09:36:10,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:10,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:36:10,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:36:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:36:10,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-20 09:36:10,435 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1171 places, 1087 transitions, 2410 flow. Second operand has 18 states, 18 states have (on average 1047.611111111111) internal successors, (18857), 18 states have internal predecessors, (18857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:10,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:10,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-20 09:36:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:12,378 INFO L130 PetriNetUnfolder]: 0/1758 cut-off events. [2022-11-20 09:36:12,378 INFO L131 PetriNetUnfolder]: For 222/222 co-relation queries the response was YES. [2022-11-20 09:36:12,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2544 conditions, 1758 events. 0/1758 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5934 event pairs, 0 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 0. Up to 131 conditions per place. [2022-11-20 09:36:12,382 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 56 selfloop transitions, 21 changer transitions 0/1111 dead transitions. [2022-11-20 09:36:12,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1191 places, 1111 transitions, 2672 flow [2022-11-20 09:36:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:36:12,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:36:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22026 transitions. [2022-11-20 09:36:12,394 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7921881743634009 [2022-11-20 09:36:12,394 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22026 transitions. [2022-11-20 09:36:12,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22026 transitions. [2022-11-20 09:36:12,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:12,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22026 transitions. [2022-11-20 09:36:12,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1048.857142857143) internal successors, (22026), 21 states have internal predecessors, (22026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:12,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1324.0) internal successors, (29128), 22 states have internal predecessors, (29128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:12,433 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1324.0) internal successors, (29128), 22 states have internal predecessors, (29128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:12,433 INFO L175 Difference]: Start difference. First operand has 1171 places, 1087 transitions, 2410 flow. Second operand 21 states and 22026 transitions. [2022-11-20 09:36:12,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1191 places, 1111 transitions, 2672 flow [2022-11-20 09:36:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1190 places, 1111 transitions, 2658 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:36:12,445 INFO L231 Difference]: Finished difference. Result has 1195 places, 1100 transitions, 2534 flow [2022-11-20 09:36:12,445 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=1170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2534, PETRI_PLACES=1195, PETRI_TRANSITIONS=1100} [2022-11-20 09:36:12,445 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 26 predicate places. [2022-11-20 09:36:12,445 INFO L495 AbstractCegarLoop]: Abstraction has has 1195 places, 1100 transitions, 2534 flow [2022-11-20 09:36:12,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1047.611111111111) internal successors, (18857), 18 states have internal predecessors, (18857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:12,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:12,447 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:12,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:12,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:12,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:12,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2088015939, now seen corresponding path program 1 times [2022-11-20 09:36:12,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:12,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947377689] [2022-11-20 09:36:12,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:12,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:12,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947377689] [2022-11-20 09:36:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947377689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205292206] [2022-11-20 09:36:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:12,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:12,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:12,855 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:12,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-11-20 09:36:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:36:14,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:14,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205292206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:14,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:14,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:36:14,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981935006] [2022-11-20 09:36:14,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:14,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:36:14,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:36:14,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:36:14,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-20 09:36:14,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1195 places, 1100 transitions, 2534 flow. Second operand has 34 states, 34 states have (on average 1047.7941176470588) internal successors, (35625), 34 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:14,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:14,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-20 09:36:14,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:17,198 INFO L130 PetriNetUnfolder]: 0/1670 cut-off events. [2022-11-20 09:36:17,198 INFO L131 PetriNetUnfolder]: For 897/897 co-relation queries the response was YES. [2022-11-20 09:36:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2706 conditions, 1670 events. 0/1670 cut-off events. For 897/897 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5352 event pairs, 0 based on Foata normal form. 8/1678 useless extension candidates. Maximal degree in co-relation 0. Up to 99 conditions per place. [2022-11-20 09:36:17,202 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 72 selfloop transitions, 45 changer transitions 0/1151 dead transitions. [2022-11-20 09:36:17,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1239 places, 1151 transitions, 3084 flow [2022-11-20 09:36:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:36:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:36:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47150 transitions. [2022-11-20 09:36:17,481 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913729439409197 [2022-11-20 09:36:17,481 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 47150 transitions. [2022-11-20 09:36:17,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 47150 transitions. [2022-11-20 09:36:17,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:17,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 47150 transitions. [2022-11-20 09:36:17,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1047.7777777777778) internal successors, (47150), 45 states have internal predecessors, (47150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:17,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1324.0) internal successors, (60904), 46 states have internal predecessors, (60904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:17,547 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1324.0) internal successors, (60904), 46 states have internal predecessors, (60904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:17,547 INFO L175 Difference]: Start difference. First operand has 1195 places, 1100 transitions, 2534 flow. Second operand 45 states and 47150 transitions. [2022-11-20 09:36:17,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1239 places, 1151 transitions, 3084 flow [2022-11-20 09:36:17,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1233 places, 1151 transitions, 3044 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:36:17,562 INFO L231 Difference]: Finished difference. Result has 1242 places, 1125 transitions, 2812 flow [2022-11-20 09:36:17,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=1189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2812, PETRI_PLACES=1242, PETRI_TRANSITIONS=1125} [2022-11-20 09:36:17,563 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 73 predicate places. [2022-11-20 09:36:17,563 INFO L495 AbstractCegarLoop]: Abstraction has has 1242 places, 1125 transitions, 2812 flow [2022-11-20 09:36:17,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1047.7941176470588) internal successors, (35625), 34 states have internal predecessors, (35625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:17,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:17,566 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:17,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-11-20 09:36:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-11-20 09:36:17,767 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1625965111, now seen corresponding path program 1 times [2022-11-20 09:36:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:17,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710409320] [2022-11-20 09:36:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:17,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:18,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:18,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710409320] [2022-11-20 09:36:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710409320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102732184] [2022-11-20 09:36:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:18,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:18,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:18,374 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:18,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-20 09:36:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:19,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:36:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:20,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:21,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102732184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:21,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:21,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:36:21,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650568960] [2022-11-20 09:36:21,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:21,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:36:21,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:36:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:36:21,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-20 09:36:21,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1242 places, 1125 transitions, 2812 flow. Second operand has 66 states, 66 states have (on average 1047.8939393939395) internal successors, (69161), 66 states have internal predecessors, (69161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:21,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:21,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-20 09:36:21,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:24,822 INFO L130 PetriNetUnfolder]: 0/1494 cut-off events. [2022-11-20 09:36:24,822 INFO L131 PetriNetUnfolder]: For 3071/3071 co-relation queries the response was YES. [2022-11-20 09:36:24,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1494 events. 0/1494 cut-off events. For 3071/3071 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4176 event pairs, 0 based on Foata normal form. 16/1510 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 09:36:24,826 INFO L137 encePairwiseOnDemand]: 1318/1324 looper letters, 104 selfloop transitions, 93 changer transitions 0/1231 dead transitions. [2022-11-20 09:36:24,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1334 places, 1231 transitions, 4054 flow [2022-11-20 09:36:24,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:36:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:36:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97398 transitions. [2022-11-20 09:36:24,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791004775363025 [2022-11-20 09:36:24,877 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 97398 transitions. [2022-11-20 09:36:24,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 97398 transitions. [2022-11-20 09:36:24,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:24,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 97398 transitions. [2022-11-20 09:36:24,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1047.2903225806451) internal successors, (97398), 93 states have internal predecessors, (97398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:25,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1324.0) internal successors, (124456), 94 states have internal predecessors, (124456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:25,033 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1324.0) internal successors, (124456), 94 states have internal predecessors, (124456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:25,033 INFO L175 Difference]: Start difference. First operand has 1242 places, 1125 transitions, 2812 flow. Second operand 93 states and 97398 transitions. [2022-11-20 09:36:25,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1334 places, 1231 transitions, 4054 flow [2022-11-20 09:36:25,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1316 places, 1231 transitions, 3966 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:36:25,073 INFO L231 Difference]: Finished difference. Result has 1333 places, 1174 transitions, 3446 flow [2022-11-20 09:36:25,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=1224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3446, PETRI_PLACES=1333, PETRI_TRANSITIONS=1174} [2022-11-20 09:36:25,074 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 164 predicate places. [2022-11-20 09:36:25,074 INFO L495 AbstractCegarLoop]: Abstraction has has 1333 places, 1174 transitions, 3446 flow [2022-11-20 09:36:25,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1047.8939393939395) internal successors, (69161), 66 states have internal predecessors, (69161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:25,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:25,079 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:25,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-20 09:36:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:25,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1382987487, now seen corresponding path program 1 times [2022-11-20 09:36:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:25,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418730235] [2022-11-20 09:36:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:27,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418730235] [2022-11-20 09:36:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418730235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142497655] [2022-11-20 09:36:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:27,776 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:27,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-20 09:36:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:36:29,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:29,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:33,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142497655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:33,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:33,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:36:33,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021754178] [2022-11-20 09:36:33,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:33,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:36:33,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:36:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:36:33,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1045 out of 1324 [2022-11-20 09:36:33,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1333 places, 1174 transitions, 3446 flow. Second operand has 130 states, 130 states have (on average 1047.946153846154) internal successors, (136233), 130 states have internal predecessors, (136233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:33,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:33,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1045 of 1324 [2022-11-20 09:36:33,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:38,465 INFO L130 PetriNetUnfolder]: 0/1406 cut-off events. [2022-11-20 09:36:38,465 INFO L131 PetriNetUnfolder]: For 4674/4674 co-relation queries the response was YES. [2022-11-20 09:36:38,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2556 conditions, 1406 events. 0/1406 cut-off events. For 4674/4674 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3619 event pairs, 0 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 0. Up to 72 conditions per place. [2022-11-20 09:36:38,468 INFO L137 encePairwiseOnDemand]: 1319/1324 looper letters, 117 selfloop transitions, 115 changer transitions 0/1256 dead transitions. [2022-11-20 09:36:38,468 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1438 places, 1256 transitions, 4622 flow [2022-11-20 09:36:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-20 09:36:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-11-20 09:36:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122505 transitions. [2022-11-20 09:36:38,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908242311565574 [2022-11-20 09:36:38,520 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 122505 transitions. [2022-11-20 09:36:38,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 122505 transitions. [2022-11-20 09:36:38,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:38,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 122505 transitions. [2022-11-20 09:36:38,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 1047.051282051282) internal successors, (122505), 117 states have internal predecessors, (122505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:38,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 1324.0) internal successors, (156232), 118 states have internal predecessors, (156232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 1324.0) internal successors, (156232), 118 states have internal predecessors, (156232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:38,692 INFO L175 Difference]: Start difference. First operand has 1333 places, 1174 transitions, 3446 flow. Second operand 117 states and 122505 transitions. [2022-11-20 09:36:38,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1438 places, 1256 transitions, 4622 flow [2022-11-20 09:36:38,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1365 places, 1256 transitions, 4230 flow, removed 25 selfloop flow, removed 73 redundant places. [2022-11-20 09:36:38,717 INFO L231 Difference]: Finished difference. Result has 1365 places, 1184 transitions, 3528 flow [2022-11-20 09:36:38,717 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1324, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=1249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1069, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=3528, PETRI_PLACES=1365, PETRI_TRANSITIONS=1184} [2022-11-20 09:36:38,718 INFO L288 CegarLoopForPetriNet]: 1169 programPoint places, 196 predicate places. [2022-11-20 09:36:38,718 INFO L495 AbstractCegarLoop]: Abstraction has has 1365 places, 1184 transitions, 3528 flow [2022-11-20 09:36:38,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1047.946153846154) internal successors, (136233), 130 states have internal predecessors, (136233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:38,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:38,732 INFO L209 CegarLoopForPetriNet]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:38,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-11-20 09:36:38,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:38,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash -997373551, now seen corresponding path program 1 times [2022-11-20 09:36:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795004776] [2022-11-20 09:36:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:38,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:36:39,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:36:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:36:39,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:36:39,172 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:36:39,172 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:36:39,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:36:39,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2022-11-20 09:36:39,173 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:39,173 WARN L233 ceAbstractionStarter]: 38 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:36:39,173 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 39 thread instances. [2022-11-20 09:36:39,296 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:36:39,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1198 places, 1357 transitions, 4391 flow [2022-11-20 09:36:41,438 INFO L130 PetriNetUnfolder]: 394/2756 cut-off events. [2022-11-20 09:36:41,438 INFO L131 PetriNetUnfolder]: For 10621/10621 co-relation queries the response was YES. [2022-11-20 09:36:41,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 2756 events. 394/2756 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10134 event pairs, 0 based on Foata normal form. 0/2282 useless extension candidates. Maximal degree in co-relation 3515. Up to 80 conditions per place. [2022-11-20 09:36:41,705 INFO L82 GeneralOperation]: Start removeDead. Operand has 1198 places, 1357 transitions, 4391 flow [2022-11-20 09:36:41,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1198 places, 1357 transitions, 4391 flow [2022-11-20 09:36:41,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:36:41,794 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:36:41,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:36:41,800 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:36:41,800 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:36:41,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:41,801 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] [2022-11-20 09:36:41,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 5581217, now seen corresponding path program 1 times [2022-11-20 09:36:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:41,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374067566] [2022-11-20 09:36:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:41,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374067566] [2022-11-20 09:36:41,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374067566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:41,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:41,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:36:41,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333682313] [2022-11-20 09:36:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:41,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:36:41,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:36:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:36:41,830 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1079 out of 1357 [2022-11-20 09:36:41,831 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1198 places, 1357 transitions, 4391 flow. Second operand has 2 states, 2 states have (on average 1079.5) internal successors, (2159), 2 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:41,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:41,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1079 of 1357 [2022-11-20 09:36:41,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:43,907 INFO L130 PetriNetUnfolder]: 0/2322 cut-off events. [2022-11-20 09:36:43,907 INFO L131 PetriNetUnfolder]: For 11401/11401 co-relation queries the response was YES. [2022-11-20 09:36:43,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3260 conditions, 2322 events. 0/2322 cut-off events. For 11401/11401 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9545 event pairs, 0 based on Foata normal form. 4614/6856 useless extension candidates. Maximal degree in co-relation 0. Up to 40 conditions per place. [2022-11-20 09:36:43,912 INFO L137 encePairwiseOnDemand]: 1119/1357 looper letters, 39 selfloop transitions, 0 changer transitions 11/1118 dead transitions. [2022-11-20 09:36:43,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1198 places, 1118 transitions, 3991 flow [2022-11-20 09:36:43,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:36:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:36:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2435 transitions. [2022-11-20 09:36:43,914 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971997052321297 [2022-11-20 09:36:43,914 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2435 transitions. [2022-11-20 09:36:43,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2435 transitions. [2022-11-20 09:36:43,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:43,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2435 transitions. [2022-11-20 09:36:43,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1217.5) internal successors, (2435), 2 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1357.0) internal successors, (4071), 3 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,918 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1357.0) internal successors, (4071), 3 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:43,918 INFO L175 Difference]: Start difference. First operand has 1198 places, 1357 transitions, 4391 flow. Second operand 2 states and 2435 transitions. [2022-11-20 09:36:43,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1198 places, 1118 transitions, 3991 flow [2022-11-20 09:36:44,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1198 places, 1118 transitions, 2509 flow, removed 741 selfloop flow, removed 0 redundant places. [2022-11-20 09:36:44,227 INFO L231 Difference]: Finished difference. Result has 1198 places, 1107 transitions, 2409 flow [2022-11-20 09:36:44,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=1197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2409, PETRI_PLACES=1198, PETRI_TRANSITIONS=1107} [2022-11-20 09:36:44,227 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 0 predicate places. [2022-11-20 09:36:44,228 INFO L495 AbstractCegarLoop]: Abstraction has has 1198 places, 1107 transitions, 2409 flow [2022-11-20 09:36:44,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1079.5) internal successors, (2159), 2 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:44,228 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:44,228 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] [2022-11-20 09:36:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2022-11-20 09:36:44,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1791370142, now seen corresponding path program 1 times [2022-11-20 09:36:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:44,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985908445] [2022-11-20 09:36:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:44,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:44,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985908445] [2022-11-20 09:36:44,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985908445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:36:44,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:36:44,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:36:44,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610898856] [2022-11-20 09:36:44,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:36:44,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:36:44,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:36:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:36:44,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1072 out of 1357 [2022-11-20 09:36:44,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1198 places, 1107 transitions, 2409 flow. Second operand has 3 states, 3 states have (on average 1073.0) internal successors, (3219), 3 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:44,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:44,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1072 of 1357 [2022-11-20 09:36:44,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:45,890 INFO L130 PetriNetUnfolder]: 0/1871 cut-off events. [2022-11-20 09:36:45,891 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-20 09:36:45,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2268 conditions, 1871 events. 0/1871 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6527 event pairs, 0 based on Foata normal form. 0/1832 useless extension candidates. Maximal degree in co-relation 0. Up to 234 conditions per place. [2022-11-20 09:36:45,894 INFO L137 encePairwiseOnDemand]: 1354/1357 looper letters, 48 selfloop transitions, 2 changer transitions 0/1111 dead transitions. [2022-11-20 09:36:45,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1189 places, 1111 transitions, 2517 flow [2022-11-20 09:36:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:36:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:36:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3267 transitions. [2022-11-20 09:36:45,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8025055268975682 [2022-11-20 09:36:45,896 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3267 transitions. [2022-11-20 09:36:45,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3267 transitions. [2022-11-20 09:36:45,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:45,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3267 transitions. [2022-11-20 09:36:45,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1089.0) internal successors, (3267), 3 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:45,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1357.0) internal successors, (5428), 4 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:45,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1357.0) internal successors, (5428), 4 states have internal predecessors, (5428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:45,901 INFO L175 Difference]: Start difference. First operand has 1198 places, 1107 transitions, 2409 flow. Second operand 3 states and 3267 transitions. [2022-11-20 09:36:45,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1189 places, 1111 transitions, 2517 flow [2022-11-20 09:36:45,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1189 places, 1111 transitions, 2517 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:36:45,909 INFO L231 Difference]: Finished difference. Result has 1190 places, 1108 transitions, 2421 flow [2022-11-20 09:36:45,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=1187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2421, PETRI_PLACES=1190, PETRI_TRANSITIONS=1108} [2022-11-20 09:36:45,910 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, -8 predicate places. [2022-11-20 09:36:45,910 INFO L495 AbstractCegarLoop]: Abstraction has has 1190 places, 1108 transitions, 2421 flow [2022-11-20 09:36:45,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1073.0) internal successors, (3219), 3 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:45,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:45,911 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] [2022-11-20 09:36:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2022-11-20 09:36:45,911 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1524162314, now seen corresponding path program 1 times [2022-11-20 09:36:45,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:45,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336079144] [2022-11-20 09:36:45,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:45,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:45,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336079144] [2022-11-20 09:36:45,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336079144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:45,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051265859] [2022-11-20 09:36:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:45,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:45,964 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:45,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-11-20 09:36:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:36:47,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:47,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:47,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:47,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051265859] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:47,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:47,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:36:47,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146102087] [2022-11-20 09:36:47,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:47,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:36:47,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:36:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:36:47,654 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-20 09:36:47,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1190 places, 1108 transitions, 2421 flow. Second operand has 10 states, 10 states have (on average 1073.3) internal successors, (10733), 10 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:47,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:47,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-20 09:36:47,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:49,445 INFO L130 PetriNetUnfolder]: 0/1849 cut-off events. [2022-11-20 09:36:49,445 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-20 09:36:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2363 conditions, 1849 events. 0/1849 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6362 event pairs, 0 based on Foata normal form. 2/1851 useless extension candidates. Maximal degree in co-relation 0. Up to 151 conditions per place. [2022-11-20 09:36:49,450 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 49 selfloop transitions, 9 changer transitions 0/1118 dead transitions. [2022-11-20 09:36:49,450 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1198 places, 1118 transitions, 2559 flow [2022-11-20 09:36:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:36:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:36:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9699 transitions. [2022-11-20 09:36:49,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7941537705723409 [2022-11-20 09:36:49,456 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9699 transitions. [2022-11-20 09:36:49,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9699 transitions. [2022-11-20 09:36:49,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:49,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9699 transitions. [2022-11-20 09:36:49,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1077.6666666666667) internal successors, (9699), 9 states have internal predecessors, (9699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1357.0) internal successors, (13570), 10 states have internal predecessors, (13570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,470 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1357.0) internal successors, (13570), 10 states have internal predecessors, (13570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,470 INFO L175 Difference]: Start difference. First operand has 1190 places, 1108 transitions, 2421 flow. Second operand 9 states and 9699 transitions. [2022-11-20 09:36:49,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1198 places, 1118 transitions, 2559 flow [2022-11-20 09:36:49,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1197 places, 1118 transitions, 2557 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:36:49,483 INFO L231 Difference]: Finished difference. Result has 1200 places, 1114 transitions, 2469 flow [2022-11-20 09:36:49,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=1189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2469, PETRI_PLACES=1200, PETRI_TRANSITIONS=1114} [2022-11-20 09:36:49,484 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 2 predicate places. [2022-11-20 09:36:49,484 INFO L495 AbstractCegarLoop]: Abstraction has has 1200 places, 1114 transitions, 2469 flow [2022-11-20 09:36:49,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1073.3) internal successors, (10733), 10 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:49,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:49,485 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:49,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-11-20 09:36:49,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-11-20 09:36:49,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:49,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:49,686 INFO L85 PathProgramCache]: Analyzing trace with hash -532890655, now seen corresponding path program 1 times [2022-11-20 09:36:49,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:49,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904895219] [2022-11-20 09:36:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:49,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:49,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:49,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904895219] [2022-11-20 09:36:49,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904895219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:49,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212356930] [2022-11-20 09:36:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:49,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:49,769 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:49,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-11-20 09:36:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:51,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:36:51,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:51,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:51,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212356930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:51,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:51,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:36:51,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093184698] [2022-11-20 09:36:51,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:51,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:36:51,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:51,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:36:51,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:36:51,517 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-20 09:36:51,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1200 places, 1114 transitions, 2469 flow. Second operand has 18 states, 18 states have (on average 1073.611111111111) internal successors, (19325), 18 states have internal predecessors, (19325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:51,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:51,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-20 09:36:51,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:53,452 INFO L130 PetriNetUnfolder]: 0/1805 cut-off events. [2022-11-20 09:36:53,452 INFO L131 PetriNetUnfolder]: For 228/228 co-relation queries the response was YES. [2022-11-20 09:36:53,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2612 conditions, 1805 events. 0/1805 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6107 event pairs, 0 based on Foata normal form. 4/1809 useless extension candidates. Maximal degree in co-relation 0. Up to 135 conditions per place. [2022-11-20 09:36:53,456 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 57 selfloop transitions, 21 changer transitions 0/1138 dead transitions. [2022-11-20 09:36:53,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1220 places, 1138 transitions, 2733 flow [2022-11-20 09:36:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:36:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:36:53,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22573 transitions. [2022-11-20 09:36:53,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.792118468610731 [2022-11-20 09:36:53,469 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 22573 transitions. [2022-11-20 09:36:53,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 22573 transitions. [2022-11-20 09:36:53,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:53,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 22573 transitions. [2022-11-20 09:36:53,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1074.904761904762) internal successors, (22573), 21 states have internal predecessors, (22573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:53,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1357.0) internal successors, (29854), 22 states have internal predecessors, (29854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:53,500 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1357.0) internal successors, (29854), 22 states have internal predecessors, (29854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:53,500 INFO L175 Difference]: Start difference. First operand has 1200 places, 1114 transitions, 2469 flow. Second operand 21 states and 22573 transitions. [2022-11-20 09:36:53,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1220 places, 1138 transitions, 2733 flow [2022-11-20 09:36:53,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1219 places, 1138 transitions, 2719 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:36:53,512 INFO L231 Difference]: Finished difference. Result has 1224 places, 1127 transitions, 2593 flow [2022-11-20 09:36:53,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=1199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2593, PETRI_PLACES=1224, PETRI_TRANSITIONS=1127} [2022-11-20 09:36:53,513 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 26 predicate places. [2022-11-20 09:36:53,513 INFO L495 AbstractCegarLoop]: Abstraction has has 1224 places, 1127 transitions, 2593 flow [2022-11-20 09:36:53,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1073.611111111111) internal successors, (19325), 18 states have internal predecessors, (19325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:53,515 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:53,515 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:53,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-11-20 09:36:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:53,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1072335421, now seen corresponding path program 1 times [2022-11-20 09:36:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:53,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316771634] [2022-11-20 09:36:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:53,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316771634] [2022-11-20 09:36:53,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316771634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707535677] [2022-11-20 09:36:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:53,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:53,906 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:53,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-11-20 09:36:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:55,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:36:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:36:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:55,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:36:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:55,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707535677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:36:55,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:36:55,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:36:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120373407] [2022-11-20 09:36:55,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:36:55,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:36:55,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:36:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:36:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:36:55,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-20 09:36:55,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1224 places, 1127 transitions, 2593 flow. Second operand has 34 states, 34 states have (on average 1073.7941176470588) internal successors, (36509), 34 states have internal predecessors, (36509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:55,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:36:55,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-20 09:36:55,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:36:58,436 INFO L130 PetriNetUnfolder]: 0/1717 cut-off events. [2022-11-20 09:36:58,436 INFO L131 PetriNetUnfolder]: For 924/924 co-relation queries the response was YES. [2022-11-20 09:36:58,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1717 events. 0/1717 cut-off events. For 924/924 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5497 event pairs, 0 based on Foata normal form. 8/1725 useless extension candidates. Maximal degree in co-relation 0. Up to 103 conditions per place. [2022-11-20 09:36:58,439 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 73 selfloop transitions, 45 changer transitions 0/1178 dead transitions. [2022-11-20 09:36:58,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1268 places, 1178 transitions, 3145 flow [2022-11-20 09:36:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:36:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:36:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48321 transitions. [2022-11-20 09:36:58,458 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913043478260869 [2022-11-20 09:36:58,458 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 48321 transitions. [2022-11-20 09:36:58,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 48321 transitions. [2022-11-20 09:36:58,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:36:58,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 48321 transitions. [2022-11-20 09:36:58,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1073.8) internal successors, (48321), 45 states have internal predecessors, (48321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1357.0) internal successors, (62422), 46 states have internal predecessors, (62422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,523 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1357.0) internal successors, (62422), 46 states have internal predecessors, (62422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,524 INFO L175 Difference]: Start difference. First operand has 1224 places, 1127 transitions, 2593 flow. Second operand 45 states and 48321 transitions. [2022-11-20 09:36:58,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1268 places, 1178 transitions, 3145 flow [2022-11-20 09:36:58,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1262 places, 1178 transitions, 3105 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:36:58,538 INFO L231 Difference]: Finished difference. Result has 1271 places, 1152 transitions, 2871 flow [2022-11-20 09:36:58,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2569, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2871, PETRI_PLACES=1271, PETRI_TRANSITIONS=1152} [2022-11-20 09:36:58,539 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 73 predicate places. [2022-11-20 09:36:58,539 INFO L495 AbstractCegarLoop]: Abstraction has has 1271 places, 1152 transitions, 2871 flow [2022-11-20 09:36:58,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1073.7941176470588) internal successors, (36509), 34 states have internal predecessors, (36509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:36:58,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:36:58,542 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:36:58,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-11-20 09:36:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:58,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:36:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:36:58,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1914134967, now seen corresponding path program 1 times [2022-11-20 09:36:58,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:36:58,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519129671] [2022-11-20 09:36:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:36:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:36:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:36:59,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:36:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519129671] [2022-11-20 09:36:59,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519129671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:36:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452552453] [2022-11-20 09:36:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:36:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:36:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:36:59,346 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:36:59,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-11-20 09:37:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:00,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:37:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:01,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:02,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452552453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:02,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:02,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:37:02,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25401255] [2022-11-20 09:37:02,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:37:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:02,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:37:02,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:37:02,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-20 09:37:02,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1271 places, 1152 transitions, 2871 flow. Second operand has 66 states, 66 states have (on average 1073.8939393939395) internal successors, (70877), 66 states have internal predecessors, (70877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:02,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:02,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-20 09:37:02,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:06,083 INFO L130 PetriNetUnfolder]: 0/1541 cut-off events. [2022-11-20 09:37:06,083 INFO L131 PetriNetUnfolder]: For 3192/3192 co-relation queries the response was YES. [2022-11-20 09:37:06,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2725 conditions, 1541 events. 0/1541 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4353 event pairs, 0 based on Foata normal form. 16/1557 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-20 09:37:06,085 INFO L137 encePairwiseOnDemand]: 1351/1357 looper letters, 105 selfloop transitions, 93 changer transitions 0/1258 dead transitions. [2022-11-20 09:37:06,085 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1363 places, 1258 transitions, 4115 flow [2022-11-20 09:37:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:37:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:37:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99817 transitions. [2022-11-20 09:37:06,128 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7909366803749575 [2022-11-20 09:37:06,128 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 99817 transitions. [2022-11-20 09:37:06,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 99817 transitions. [2022-11-20 09:37:06,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:06,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 99817 transitions. [2022-11-20 09:37:06,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1073.3010752688172) internal successors, (99817), 93 states have internal predecessors, (99817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:06,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1357.0) internal successors, (127558), 94 states have internal predecessors, (127558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:06,266 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1357.0) internal successors, (127558), 94 states have internal predecessors, (127558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:06,266 INFO L175 Difference]: Start difference. First operand has 1271 places, 1152 transitions, 2871 flow. Second operand 93 states and 99817 transitions. [2022-11-20 09:37:06,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1363 places, 1258 transitions, 4115 flow [2022-11-20 09:37:06,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1345 places, 1258 transitions, 4027 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:37:06,300 INFO L231 Difference]: Finished difference. Result has 1362 places, 1201 transitions, 3505 flow [2022-11-20 09:37:06,300 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=1253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3505, PETRI_PLACES=1362, PETRI_TRANSITIONS=1201} [2022-11-20 09:37:06,301 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 164 predicate places. [2022-11-20 09:37:06,301 INFO L495 AbstractCegarLoop]: Abstraction has has 1362 places, 1201 transitions, 3505 flow [2022-11-20 09:37:06,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1073.8939393939395) internal successors, (70877), 66 states have internal predecessors, (70877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:06,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:06,309 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:06,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:06,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:06,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:06,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:06,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1221043617, now seen corresponding path program 1 times [2022-11-20 09:37:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:06,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131535480] [2022-11-20 09:37:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:06,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:08,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131535480] [2022-11-20 09:37:08,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131535480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:08,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059625912] [2022-11-20 09:37:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:08,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:08,936 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:08,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-20 09:37:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:10,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:37:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:11,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:14,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059625912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:14,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:14,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:37:14,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182182549] [2022-11-20 09:37:14,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:14,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:37:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:14,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:37:14,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:37:14,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1071 out of 1357 [2022-11-20 09:37:14,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1362 places, 1201 transitions, 3505 flow. Second operand has 130 states, 130 states have (on average 1073.946153846154) internal successors, (139613), 130 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:14,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:14,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1071 of 1357 [2022-11-20 09:37:14,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:19,809 INFO L130 PetriNetUnfolder]: 0/1442 cut-off events. [2022-11-20 09:37:19,809 INFO L131 PetriNetUnfolder]: For 5171/5171 co-relation queries the response was YES. [2022-11-20 09:37:19,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2624 conditions, 1442 events. 0/1442 cut-off events. For 5171/5171 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3717 event pairs, 0 based on Foata normal form. 9/1451 useless extension candidates. Maximal degree in co-relation 0. Up to 74 conditions per place. [2022-11-20 09:37:19,812 INFO L137 encePairwiseOnDemand]: 1352/1357 looper letters, 120 selfloop transitions, 118 changer transitions 0/1288 dead transitions. [2022-11-20 09:37:19,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1470 places, 1288 transitions, 4747 flow [2022-11-20 09:37:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-20 09:37:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2022-11-20 09:37:19,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128767 transitions. [2022-11-20 09:37:19,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7907577990665684 [2022-11-20 09:37:19,868 INFO L72 ComplementDD]: Start complementDD. Operand 120 states and 128767 transitions. [2022-11-20 09:37:19,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 128767 transitions. [2022-11-20 09:37:19,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:19,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 120 states and 128767 transitions. [2022-11-20 09:37:20,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 121 states, 120 states have (on average 1073.0583333333334) internal successors, (128767), 120 states have internal predecessors, (128767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:20,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 121 states, 121 states have (on average 1357.0) internal successors, (164197), 121 states have internal predecessors, (164197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:20,356 INFO L81 ComplementDD]: Finished complementDD. Result has 121 states, 121 states have (on average 1357.0) internal successors, (164197), 121 states have internal predecessors, (164197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:20,356 INFO L175 Difference]: Start difference. First operand has 1362 places, 1201 transitions, 3505 flow. Second operand 120 states and 128767 transitions. [2022-11-20 09:37:20,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1470 places, 1288 transitions, 4747 flow [2022-11-20 09:37:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1397 places, 1288 transitions, 4345 flow, removed 26 selfloop flow, removed 73 redundant places. [2022-11-20 09:37:20,377 INFO L231 Difference]: Finished difference. Result has 1397 places, 1214 transitions, 3621 flow [2022-11-20 09:37:20,378 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1357, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=1278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_STATES=120, PETRI_FLOW=3621, PETRI_PLACES=1397, PETRI_TRANSITIONS=1214} [2022-11-20 09:37:20,378 INFO L288 CegarLoopForPetriNet]: 1198 programPoint places, 199 predicate places. [2022-11-20 09:37:20,378 INFO L495 AbstractCegarLoop]: Abstraction has has 1397 places, 1214 transitions, 3621 flow [2022-11-20 09:37:20,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1073.946153846154) internal successors, (139613), 130 states have internal predecessors, (139613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:20,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:20,388 INFO L209 CegarLoopForPetriNet]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:20,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-11-20 09:37:20,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:20,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:20,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash 322028939, now seen corresponding path program 1 times [2022-11-20 09:37:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:20,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694097221] [2022-11-20 09:37:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:20,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:37:20,761 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:37:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:37:20,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:37:20,975 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:37:20,975 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:37:20,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:37:20,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254 [2022-11-20 09:37:20,976 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:20,976 WARN L233 ceAbstractionStarter]: 39 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:37:20,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 40 thread instances. [2022-11-20 09:37:21,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:37:21,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1227 places, 1390 transitions, 4540 flow [2022-11-20 09:37:23,634 INFO L130 PetriNetUnfolder]: 404/2825 cut-off events. [2022-11-20 09:37:23,634 INFO L131 PetriNetUnfolder]: For 11440/11440 co-relation queries the response was YES. [2022-11-20 09:37:23,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3766 conditions, 2825 events. 404/2825 cut-off events. For 11440/11440 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10363 event pairs, 0 based on Foata normal form. 0/2339 useless extension candidates. Maximal degree in co-relation 3626. Up to 82 conditions per place. [2022-11-20 09:37:23,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 1227 places, 1390 transitions, 4540 flow [2022-11-20 09:37:24,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1227 places, 1390 transitions, 4540 flow [2022-11-20 09:37:24,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:37:24,049 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:37:24,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:37:24,055 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:37:24,055 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:37:24,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:24,055 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] [2022-11-20 09:37:24,055 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:24,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:24,056 INFO L85 PathProgramCache]: Analyzing trace with hash -54327263, now seen corresponding path program 1 times [2022-11-20 09:37:24,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:24,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944529885] [2022-11-20 09:37:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:24,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944529885] [2022-11-20 09:37:24,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944529885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:24,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:24,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:37:24,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764542323] [2022-11-20 09:37:24,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:24,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:37:24,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:24,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:37:24,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:37:24,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1105 out of 1390 [2022-11-20 09:37:24,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1227 places, 1390 transitions, 4540 flow. Second operand has 2 states, 2 states have (on average 1105.5) internal successors, (2211), 2 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:24,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:24,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1105 of 1390 [2022-11-20 09:37:24,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:26,072 INFO L130 PetriNetUnfolder]: 0/2380 cut-off events. [2022-11-20 09:37:26,072 INFO L131 PetriNetUnfolder]: For 12260/12260 co-relation queries the response was YES. [2022-11-20 09:37:26,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3362 conditions, 2380 events. 0/2380 cut-off events. For 12260/12260 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 9792 event pairs, 0 based on Foata normal form. 4852/7150 useless extension candidates. Maximal degree in co-relation 0. Up to 41 conditions per place. [2022-11-20 09:37:26,077 INFO L137 encePairwiseOnDemand]: 1146/1390 looper letters, 40 selfloop transitions, 0 changer transitions 11/1145 dead transitions. [2022-11-20 09:37:26,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1227 places, 1145 transitions, 4130 flow [2022-11-20 09:37:26,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:37:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:37:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2494 transitions. [2022-11-20 09:37:26,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8971223021582734 [2022-11-20 09:37:26,080 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2494 transitions. [2022-11-20 09:37:26,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2494 transitions. [2022-11-20 09:37:26,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:26,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2494 transitions. [2022-11-20 09:37:26,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1247.0) internal successors, (2494), 2 states have internal predecessors, (2494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1390.0) internal successors, (4170), 3 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,083 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1390.0) internal successors, (4170), 3 states have internal predecessors, (4170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,083 INFO L175 Difference]: Start difference. First operand has 1227 places, 1390 transitions, 4540 flow. Second operand 2 states and 2494 transitions. [2022-11-20 09:37:26,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1227 places, 1145 transitions, 4130 flow [2022-11-20 09:37:26,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1227 places, 1145 transitions, 2570 flow, removed 780 selfloop flow, removed 0 redundant places. [2022-11-20 09:37:26,106 INFO L231 Difference]: Finished difference. Result has 1227 places, 1134 transitions, 2468 flow [2022-11-20 09:37:26,107 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2490, PETRI_DIFFERENCE_MINUEND_PLACES=1226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2468, PETRI_PLACES=1227, PETRI_TRANSITIONS=1134} [2022-11-20 09:37:26,107 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 0 predicate places. [2022-11-20 09:37:26,107 INFO L495 AbstractCegarLoop]: Abstraction has has 1227 places, 1134 transitions, 2468 flow [2022-11-20 09:37:26,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1105.5) internal successors, (2211), 2 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,107 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:26,108 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] [2022-11-20 09:37:26,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255 [2022-11-20 09:37:26,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1851278622, now seen corresponding path program 1 times [2022-11-20 09:37:26,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:26,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791246395] [2022-11-20 09:37:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:26,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:26,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791246395] [2022-11-20 09:37:26,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791246395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:37:26,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:37:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:37:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444136944] [2022-11-20 09:37:26,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:37:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:37:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:37:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:37:26,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1098 out of 1390 [2022-11-20 09:37:26,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1227 places, 1134 transitions, 2468 flow. Second operand has 3 states, 3 states have (on average 1099.0) internal successors, (3297), 3 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:26,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:26,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1098 of 1390 [2022-11-20 09:37:26,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:27,761 INFO L130 PetriNetUnfolder]: 0/1918 cut-off events. [2022-11-20 09:37:27,762 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2022-11-20 09:37:27,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 1918 events. 0/1918 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6700 event pairs, 0 based on Foata normal form. 0/1878 useless extension candidates. Maximal degree in co-relation 0. Up to 240 conditions per place. [2022-11-20 09:37:27,765 INFO L137 encePairwiseOnDemand]: 1387/1390 looper letters, 49 selfloop transitions, 2 changer transitions 0/1138 dead transitions. [2022-11-20 09:37:27,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1218 places, 1138 transitions, 2578 flow [2022-11-20 09:37:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:37:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:37:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3346 transitions. [2022-11-20 09:37:27,768 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8023980815347722 [2022-11-20 09:37:27,768 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3346 transitions. [2022-11-20 09:37:27,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3346 transitions. [2022-11-20 09:37:27,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:27,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3346 transitions. [2022-11-20 09:37:27,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1115.3333333333333) internal successors, (3346), 3 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:27,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1390.0) internal successors, (5560), 4 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:27,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1390.0) internal successors, (5560), 4 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:27,773 INFO L175 Difference]: Start difference. First operand has 1227 places, 1134 transitions, 2468 flow. Second operand 3 states and 3346 transitions. [2022-11-20 09:37:27,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1218 places, 1138 transitions, 2578 flow [2022-11-20 09:37:27,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1218 places, 1138 transitions, 2578 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:37:27,783 INFO L231 Difference]: Finished difference. Result has 1219 places, 1135 transitions, 2480 flow [2022-11-20 09:37:27,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=1216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2480, PETRI_PLACES=1219, PETRI_TRANSITIONS=1135} [2022-11-20 09:37:27,784 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, -8 predicate places. [2022-11-20 09:37:27,784 INFO L495 AbstractCegarLoop]: Abstraction has has 1219 places, 1135 transitions, 2480 flow [2022-11-20 09:37:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1099.0) internal successors, (3297), 3 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:27,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:27,785 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] [2022-11-20 09:37:27,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256 [2022-11-20 09:37:27,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:27,785 INFO L85 PathProgramCache]: Analyzing trace with hash -537156522, now seen corresponding path program 1 times [2022-11-20 09:37:27,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:27,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155227397] [2022-11-20 09:37:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:27,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:27,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:27,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155227397] [2022-11-20 09:37:27,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155227397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:27,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220519501] [2022-11-20 09:37:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:27,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:27,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:27,834 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:27,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-20 09:37:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:29,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:37:29,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:29,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:29,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220519501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:29,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:29,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:37:29,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338780392] [2022-11-20 09:37:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:29,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:37:29,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:37:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:37:29,570 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-20 09:37:29,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1219 places, 1135 transitions, 2480 flow. Second operand has 10 states, 10 states have (on average 1099.3) internal successors, (10993), 10 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:29,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:29,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-20 09:37:29,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:31,529 INFO L130 PetriNetUnfolder]: 0/1896 cut-off events. [2022-11-20 09:37:31,530 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-20 09:37:31,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 1896 events. 0/1896 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6570 event pairs, 0 based on Foata normal form. 2/1898 useless extension candidates. Maximal degree in co-relation 0. Up to 155 conditions per place. [2022-11-20 09:37:31,533 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 50 selfloop transitions, 9 changer transitions 0/1145 dead transitions. [2022-11-20 09:37:31,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1227 places, 1145 transitions, 2620 flow [2022-11-20 09:37:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:37:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:37:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9934 transitions. [2022-11-20 09:37:31,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940847322142286 [2022-11-20 09:37:31,540 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 9934 transitions. [2022-11-20 09:37:31,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 9934 transitions. [2022-11-20 09:37:31,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:31,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 9934 transitions. [2022-11-20 09:37:31,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1103.7777777777778) internal successors, (9934), 9 states have internal predecessors, (9934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1390.0) internal successors, (13900), 10 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,554 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1390.0) internal successors, (13900), 10 states have internal predecessors, (13900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,554 INFO L175 Difference]: Start difference. First operand has 1219 places, 1135 transitions, 2480 flow. Second operand 9 states and 9934 transitions. [2022-11-20 09:37:31,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1227 places, 1145 transitions, 2620 flow [2022-11-20 09:37:31,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1226 places, 1145 transitions, 2618 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:37:31,564 INFO L231 Difference]: Finished difference. Result has 1229 places, 1141 transitions, 2528 flow [2022-11-20 09:37:31,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=1218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2528, PETRI_PLACES=1229, PETRI_TRANSITIONS=1141} [2022-11-20 09:37:31,565 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 2 predicate places. [2022-11-20 09:37:31,565 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 1141 transitions, 2528 flow [2022-11-20 09:37:31,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1099.3) internal successors, (10993), 10 states have internal predecessors, (10993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:31,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:31,566 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:31,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-11-20 09:37:31,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-11-20 09:37:31,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:31,767 INFO L85 PathProgramCache]: Analyzing trace with hash -283459327, now seen corresponding path program 1 times [2022-11-20 09:37:31,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:31,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903895081] [2022-11-20 09:37:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:31,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:31,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:31,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903895081] [2022-11-20 09:37:31,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903895081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:31,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416502965] [2022-11-20 09:37:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:31,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:31,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:31,850 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:31,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-11-20 09:37:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:33,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:37:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:33,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:33,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416502965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:33,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:33,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:37:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046624194] [2022-11-20 09:37:33,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:33,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:37:33,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:37:33,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:37:33,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-20 09:37:33,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 1141 transitions, 2528 flow. Second operand has 18 states, 18 states have (on average 1099.611111111111) internal successors, (19793), 18 states have internal predecessors, (19793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:33,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:33,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-20 09:37:33,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:35,986 INFO L130 PetriNetUnfolder]: 0/1852 cut-off events. [2022-11-20 09:37:35,986 INFO L131 PetriNetUnfolder]: For 234/234 co-relation queries the response was YES. [2022-11-20 09:37:35,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 1852 events. 0/1852 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6278 event pairs, 0 based on Foata normal form. 4/1856 useless extension candidates. Maximal degree in co-relation 0. Up to 139 conditions per place. [2022-11-20 09:37:35,990 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 58 selfloop transitions, 21 changer transitions 0/1165 dead transitions. [2022-11-20 09:37:35,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1249 places, 1165 transitions, 2794 flow [2022-11-20 09:37:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:37:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:37:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23120 transitions. [2022-11-20 09:37:36,002 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7920520726276122 [2022-11-20 09:37:36,003 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23120 transitions. [2022-11-20 09:37:36,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23120 transitions. [2022-11-20 09:37:36,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:36,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23120 transitions. [2022-11-20 09:37:36,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1100.952380952381) internal successors, (23120), 21 states have internal predecessors, (23120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:36,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1390.0) internal successors, (30580), 22 states have internal predecessors, (30580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:36,035 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1390.0) internal successors, (30580), 22 states have internal predecessors, (30580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:36,035 INFO L175 Difference]: Start difference. First operand has 1229 places, 1141 transitions, 2528 flow. Second operand 21 states and 23120 transitions. [2022-11-20 09:37:36,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1249 places, 1165 transitions, 2794 flow [2022-11-20 09:37:36,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1248 places, 1165 transitions, 2780 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:37:36,046 INFO L231 Difference]: Finished difference. Result has 1253 places, 1154 transitions, 2652 flow [2022-11-20 09:37:36,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2522, PETRI_DIFFERENCE_MINUEND_PLACES=1228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2652, PETRI_PLACES=1253, PETRI_TRANSITIONS=1154} [2022-11-20 09:37:36,047 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 26 predicate places. [2022-11-20 09:37:36,047 INFO L495 AbstractCegarLoop]: Abstraction has has 1253 places, 1154 transitions, 2652 flow [2022-11-20 09:37:36,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1099.611111111111) internal successors, (19793), 18 states have internal predecessors, (19793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:36,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:36,049 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:36,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-11-20 09:37:36,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-11-20 09:37:36,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1337941603, now seen corresponding path program 1 times [2022-11-20 09:37:36,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:36,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985239902] [2022-11-20 09:37:36,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:36,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:36,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985239902] [2022-11-20 09:37:36,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985239902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:36,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902407496] [2022-11-20 09:37:36,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:36,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:36,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:36,443 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:36,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-20 09:37:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:38,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:37:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:38,245 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:38,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:38,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902407496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:38,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:38,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:37:38,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940218106] [2022-11-20 09:37:38,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:38,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:37:38,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:37:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:37:38,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-20 09:37:38,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1253 places, 1154 transitions, 2652 flow. Second operand has 34 states, 34 states have (on average 1099.7941176470588) internal successors, (37393), 34 states have internal predecessors, (37393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:38,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:38,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-20 09:37:38,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:41,057 INFO L130 PetriNetUnfolder]: 0/1764 cut-off events. [2022-11-20 09:37:41,057 INFO L131 PetriNetUnfolder]: For 951/951 co-relation queries the response was YES. [2022-11-20 09:37:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2860 conditions, 1764 events. 0/1764 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5668 event pairs, 0 based on Foata normal form. 8/1772 useless extension candidates. Maximal degree in co-relation 0. Up to 107 conditions per place. [2022-11-20 09:37:41,060 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 74 selfloop transitions, 45 changer transitions 0/1205 dead transitions. [2022-11-20 09:37:41,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1297 places, 1205 transitions, 3206 flow [2022-11-20 09:37:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:37:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:37:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49492 transitions. [2022-11-20 09:37:41,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7912390087929656 [2022-11-20 09:37:41,085 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 49492 transitions. [2022-11-20 09:37:41,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 49492 transitions. [2022-11-20 09:37:41,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:41,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 49492 transitions. [2022-11-20 09:37:41,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1099.8222222222223) internal successors, (49492), 45 states have internal predecessors, (49492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:41,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1390.0) internal successors, (63940), 46 states have internal predecessors, (63940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:41,153 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1390.0) internal successors, (63940), 46 states have internal predecessors, (63940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:41,153 INFO L175 Difference]: Start difference. First operand has 1253 places, 1154 transitions, 2652 flow. Second operand 45 states and 49492 transitions. [2022-11-20 09:37:41,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1297 places, 1205 transitions, 3206 flow [2022-11-20 09:37:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1291 places, 1205 transitions, 3166 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:37:41,169 INFO L231 Difference]: Finished difference. Result has 1300 places, 1179 transitions, 2930 flow [2022-11-20 09:37:41,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2930, PETRI_PLACES=1300, PETRI_TRANSITIONS=1179} [2022-11-20 09:37:41,170 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 73 predicate places. [2022-11-20 09:37:41,170 INFO L495 AbstractCegarLoop]: Abstraction has has 1300 places, 1179 transitions, 2930 flow [2022-11-20 09:37:41,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1099.7941176470588) internal successors, (37393), 34 states have internal predecessors, (37393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:41,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:41,174 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:41,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-11-20 09:37:41,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:41,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 2021429591, now seen corresponding path program 1 times [2022-11-20 09:37:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:41,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435094097] [2022-11-20 09:37:41,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:41,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:41,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435094097] [2022-11-20 09:37:41,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435094097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:41,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725113611] [2022-11-20 09:37:41,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:41,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:41,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:41,967 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:41,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-20 09:37:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:43,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:37:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:43,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:44,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:44,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725113611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:44,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:44,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:37:44,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382197834] [2022-11-20 09:37:44,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:44,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:37:44,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:44,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:37:44,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:37:44,911 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-20 09:37:44,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1300 places, 1179 transitions, 2930 flow. Second operand has 66 states, 66 states have (on average 1099.8939393939395) internal successors, (72593), 66 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:44,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:44,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-20 09:37:44,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:37:48,652 INFO L130 PetriNetUnfolder]: 0/1588 cut-off events. [2022-11-20 09:37:48,652 INFO L131 PetriNetUnfolder]: For 3313/3313 co-relation queries the response was YES. [2022-11-20 09:37:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2815 conditions, 1588 events. 0/1588 cut-off events. For 3313/3313 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4526 event pairs, 0 based on Foata normal form. 16/1604 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-20 09:37:48,655 INFO L137 encePairwiseOnDemand]: 1384/1390 looper letters, 106 selfloop transitions, 93 changer transitions 0/1285 dead transitions. [2022-11-20 09:37:48,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1392 places, 1285 transitions, 4176 flow [2022-11-20 09:37:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:37:48,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:37:48,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102236 transitions. [2022-11-20 09:37:48,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.790871818674093 [2022-11-20 09:37:48,696 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 102236 transitions. [2022-11-20 09:37:48,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 102236 transitions. [2022-11-20 09:37:48,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:37:48,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 102236 transitions. [2022-11-20 09:37:48,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1099.3118279569892) internal successors, (102236), 93 states have internal predecessors, (102236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:48,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1390.0) internal successors, (130660), 94 states have internal predecessors, (130660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:48,842 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1390.0) internal successors, (130660), 94 states have internal predecessors, (130660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:48,842 INFO L175 Difference]: Start difference. First operand has 1300 places, 1179 transitions, 2930 flow. Second operand 93 states and 102236 transitions. [2022-11-20 09:37:48,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1392 places, 1285 transitions, 4176 flow [2022-11-20 09:37:48,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1374 places, 1285 transitions, 4088 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:37:48,868 INFO L231 Difference]: Finished difference. Result has 1391 places, 1228 transitions, 3564 flow [2022-11-20 09:37:48,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=1282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3564, PETRI_PLACES=1391, PETRI_TRANSITIONS=1228} [2022-11-20 09:37:48,869 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 164 predicate places. [2022-11-20 09:37:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 1391 places, 1228 transitions, 3564 flow [2022-11-20 09:37:48,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1099.8939393939395) internal successors, (72593), 66 states have internal predecessors, (72593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:48,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:37:48,877 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:37:48,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-20 09:37:49,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:49,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:37:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:37:49,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1369577471, now seen corresponding path program 1 times [2022-11-20 09:37:49,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:37:49,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140455758] [2022-11-20 09:37:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:37:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:51,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:37:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140455758] [2022-11-20 09:37:51,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140455758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:37:51,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571648845] [2022-11-20 09:37:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:37:51,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:37:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:37:51,465 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:37:51,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-11-20 09:37:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:37:53,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:37:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:37:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:53,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:37:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:37:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571648845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:37:57,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:37:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:37:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775762648] [2022-11-20 09:37:57,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:37:57,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:37:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:37:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:37:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:37:57,297 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1097 out of 1390 [2022-11-20 09:37:57,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1391 places, 1228 transitions, 3564 flow. Second operand has 130 states, 130 states have (on average 1099.946153846154) internal successors, (142993), 130 states have internal predecessors, (142993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:37:57,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:37:57,342 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1097 of 1390 [2022-11-20 09:37:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:02,693 INFO L130 PetriNetUnfolder]: 0/1478 cut-off events. [2022-11-20 09:38:02,693 INFO L131 PetriNetUnfolder]: For 5668/5668 co-relation queries the response was YES. [2022-11-20 09:38:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2692 conditions, 1478 events. 0/1478 cut-off events. For 5668/5668 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3815 event pairs, 0 based on Foata normal form. 10/1488 useless extension candidates. Maximal degree in co-relation 0. Up to 76 conditions per place. [2022-11-20 09:38:02,695 INFO L137 encePairwiseOnDemand]: 1385/1390 looper letters, 123 selfloop transitions, 121 changer transitions 0/1320 dead transitions. [2022-11-20 09:38:02,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1502 places, 1320 transitions, 4872 flow [2022-11-20 09:38:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-11-20 09:38:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2022-11-20 09:38:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 135185 transitions. [2022-11-20 09:38:02,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906942738492133 [2022-11-20 09:38:02,751 INFO L72 ComplementDD]: Start complementDD. Operand 123 states and 135185 transitions. [2022-11-20 09:38:02,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 135185 transitions. [2022-11-20 09:38:02,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:02,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 123 states and 135185 transitions. [2022-11-20 09:38:03,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 124 states, 123 states have (on average 1099.0650406504064) internal successors, (135185), 123 states have internal predecessors, (135185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:03,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 124 states, 124 states have (on average 1390.0) internal successors, (172360), 124 states have internal predecessors, (172360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:03,242 INFO L81 ComplementDD]: Finished complementDD. Result has 124 states, 124 states have (on average 1390.0) internal successors, (172360), 124 states have internal predecessors, (172360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:03,242 INFO L175 Difference]: Start difference. First operand has 1391 places, 1228 transitions, 3564 flow. Second operand 123 states and 135185 transitions. [2022-11-20 09:38:03,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1502 places, 1320 transitions, 4872 flow [2022-11-20 09:38:03,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1429 places, 1320 transitions, 4460 flow, removed 27 selfloop flow, removed 73 redundant places. [2022-11-20 09:38:03,265 INFO L231 Difference]: Finished difference. Result has 1429 places, 1244 transitions, 3714 flow [2022-11-20 09:38:03,265 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1390, PETRI_DIFFERENCE_MINUEND_FLOW=3220, PETRI_DIFFERENCE_MINUEND_PLACES=1307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=123, PETRI_FLOW=3714, PETRI_PLACES=1429, PETRI_TRANSITIONS=1244} [2022-11-20 09:38:03,265 INFO L288 CegarLoopForPetriNet]: 1227 programPoint places, 202 predicate places. [2022-11-20 09:38:03,265 INFO L495 AbstractCegarLoop]: Abstraction has has 1429 places, 1244 transitions, 3714 flow [2022-11-20 09:38:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1099.946153846154) internal successors, (142993), 130 states have internal predecessors, (142993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:03,277 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:03,277 INFO L209 CegarLoopForPetriNet]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:03,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-11-20 09:38:03,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:03,478 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:03,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash 803234726, now seen corresponding path program 1 times [2022-11-20 09:38:03,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:03,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827834331] [2022-11-20 09:38:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:38:03,622 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:38:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:38:03,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:38:03,755 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:38:03,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:38:03,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:38:03,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262 [2022-11-20 09:38:03,755 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:03,756 WARN L233 ceAbstractionStarter]: 40 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:38:03,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 41 thread instances. [2022-11-20 09:38:03,876 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:38:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1256 places, 1423 transitions, 4691 flow [2022-11-20 09:38:06,269 INFO L130 PetriNetUnfolder]: 414/2894 cut-off events. [2022-11-20 09:38:06,269 INFO L131 PetriNetUnfolder]: For 12300/12300 co-relation queries the response was YES. [2022-11-20 09:38:06,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 2894 events. 414/2894 cut-off events. For 12300/12300 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10637 event pairs, 0 based on Foata normal form. 0/2396 useless extension candidates. Maximal degree in co-relation 3738. Up to 84 conditions per place. [2022-11-20 09:38:06,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 1256 places, 1423 transitions, 4691 flow [2022-11-20 09:38:06,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1256 places, 1423 transitions, 4691 flow [2022-11-20 09:38:06,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:38:06,532 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:38:06,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:38:06,539 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:38:06,539 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:38:06,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:06,539 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] [2022-11-20 09:38:06,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1985050271, now seen corresponding path program 1 times [2022-11-20 09:38:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139169826] [2022-11-20 09:38:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:06,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:06,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139169826] [2022-11-20 09:38:06,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139169826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:38:06,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:38:06,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:38:06,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434059061] [2022-11-20 09:38:06,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:38:06,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:38:06,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:06,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:38:06,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:38:06,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1131 out of 1423 [2022-11-20 09:38:06,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1256 places, 1423 transitions, 4691 flow. Second operand has 2 states, 2 states have (on average 1131.5) internal successors, (2263), 2 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:06,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:06,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1131 of 1423 [2022-11-20 09:38:06,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:08,886 INFO L130 PetriNetUnfolder]: 0/2438 cut-off events. [2022-11-20 09:38:08,886 INFO L131 PetriNetUnfolder]: For 13161/13161 co-relation queries the response was YES. [2022-11-20 09:38:08,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3465 conditions, 2438 events. 0/2438 cut-off events. For 13161/13161 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 10039 event pairs, 0 based on Foata normal form. 5096/7450 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2022-11-20 09:38:08,891 INFO L137 encePairwiseOnDemand]: 1173/1423 looper letters, 41 selfloop transitions, 0 changer transitions 11/1172 dead transitions. [2022-11-20 09:38:08,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1256 places, 1172 transitions, 4271 flow [2022-11-20 09:38:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:38:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:38:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2553 transitions. [2022-11-20 09:38:08,894 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8970484891075193 [2022-11-20 09:38:08,894 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2553 transitions. [2022-11-20 09:38:08,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2553 transitions. [2022-11-20 09:38:08,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:08,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2553 transitions. [2022-11-20 09:38:08,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1276.5) internal successors, (2553), 2 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1423.0) internal successors, (4269), 3 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,900 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1423.0) internal successors, (4269), 3 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,900 INFO L175 Difference]: Start difference. First operand has 1256 places, 1423 transitions, 4691 flow. Second operand 2 states and 2553 transitions. [2022-11-20 09:38:08,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1256 places, 1172 transitions, 4271 flow [2022-11-20 09:38:08,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1256 places, 1172 transitions, 2631 flow, removed 820 selfloop flow, removed 0 redundant places. [2022-11-20 09:38:08,941 INFO L231 Difference]: Finished difference. Result has 1256 places, 1161 transitions, 2527 flow [2022-11-20 09:38:08,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2549, PETRI_DIFFERENCE_MINUEND_PLACES=1255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2527, PETRI_PLACES=1256, PETRI_TRANSITIONS=1161} [2022-11-20 09:38:08,942 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 0 predicate places. [2022-11-20 09:38:08,942 INFO L495 AbstractCegarLoop]: Abstraction has has 1256 places, 1161 transitions, 2527 flow [2022-11-20 09:38:08,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1131.5) internal successors, (2263), 2 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:08,943 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] [2022-11-20 09:38:08,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263 [2022-11-20 09:38:08,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash 512965666, now seen corresponding path program 1 times [2022-11-20 09:38:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:08,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730261072] [2022-11-20 09:38:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:08,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:08,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:08,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730261072] [2022-11-20 09:38:08,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730261072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:38:08,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:38:08,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:38:08,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882048754] [2022-11-20 09:38:08,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:38:08,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:38:08,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:38:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:38:08,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1124 out of 1423 [2022-11-20 09:38:08,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1256 places, 1161 transitions, 2527 flow. Second operand has 3 states, 3 states have (on average 1125.0) internal successors, (3375), 3 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:08,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:08,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1124 of 1423 [2022-11-20 09:38:08,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:10,961 INFO L130 PetriNetUnfolder]: 0/1965 cut-off events. [2022-11-20 09:38:10,961 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-20 09:38:10,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2382 conditions, 1965 events. 0/1965 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6869 event pairs, 0 based on Foata normal form. 0/1924 useless extension candidates. Maximal degree in co-relation 0. Up to 246 conditions per place. [2022-11-20 09:38:10,965 INFO L137 encePairwiseOnDemand]: 1420/1423 looper letters, 50 selfloop transitions, 2 changer transitions 0/1165 dead transitions. [2022-11-20 09:38:10,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1247 places, 1165 transitions, 2639 flow [2022-11-20 09:38:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:38:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:38:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3425 transitions. [2022-11-20 09:38:10,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8022956195830405 [2022-11-20 09:38:10,969 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3425 transitions. [2022-11-20 09:38:10,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3425 transitions. [2022-11-20 09:38:10,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:10,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3425 transitions. [2022-11-20 09:38:10,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1141.6666666666667) internal successors, (3425), 3 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:10,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1423.0) internal successors, (5692), 4 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:10,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1423.0) internal successors, (5692), 4 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:10,976 INFO L175 Difference]: Start difference. First operand has 1256 places, 1161 transitions, 2527 flow. Second operand 3 states and 3425 transitions. [2022-11-20 09:38:10,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1247 places, 1165 transitions, 2639 flow [2022-11-20 09:38:10,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1247 places, 1165 transitions, 2639 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:38:10,990 INFO L231 Difference]: Finished difference. Result has 1248 places, 1162 transitions, 2539 flow [2022-11-20 09:38:10,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=1245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2539, PETRI_PLACES=1248, PETRI_TRANSITIONS=1162} [2022-11-20 09:38:10,990 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, -8 predicate places. [2022-11-20 09:38:10,991 INFO L495 AbstractCegarLoop]: Abstraction has has 1248 places, 1162 transitions, 2539 flow [2022-11-20 09:38:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1125.0) internal successors, (3375), 3 states have internal predecessors, (3375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:10,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:10,991 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] [2022-11-20 09:38:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264 [2022-11-20 09:38:10,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1642077974, now seen corresponding path program 1 times [2022-11-20 09:38:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367298905] [2022-11-20 09:38:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:11,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367298905] [2022-11-20 09:38:11,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367298905] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:11,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194749582] [2022-11-20 09:38:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:11,061 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:11,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-20 09:38:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:38:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:12,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194749582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:12,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:38:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210571591] [2022-11-20 09:38:12,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:12,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-20 09:38:12,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1248 places, 1162 transitions, 2539 flow. Second operand has 10 states, 10 states have (on average 1125.3) internal successors, (11253), 10 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:12,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:12,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-20 09:38:12,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:15,132 INFO L130 PetriNetUnfolder]: 0/1943 cut-off events. [2022-11-20 09:38:15,132 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-20 09:38:15,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2483 conditions, 1943 events. 0/1943 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6702 event pairs, 0 based on Foata normal form. 2/1945 useless extension candidates. Maximal degree in co-relation 0. Up to 159 conditions per place. [2022-11-20 09:38:15,135 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 51 selfloop transitions, 9 changer transitions 0/1172 dead transitions. [2022-11-20 09:38:15,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1256 places, 1172 transitions, 2681 flow [2022-11-20 09:38:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 09:38:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 09:38:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10169 transitions. [2022-11-20 09:38:15,142 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7940188959162958 [2022-11-20 09:38:15,142 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 10169 transitions. [2022-11-20 09:38:15,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10169 transitions. [2022-11-20 09:38:15,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:15,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 10169 transitions. [2022-11-20 09:38:15,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 1129.888888888889) internal successors, (10169), 9 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:15,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 1423.0) internal successors, (14230), 10 states have internal predecessors, (14230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:15,155 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 1423.0) internal successors, (14230), 10 states have internal predecessors, (14230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:15,155 INFO L175 Difference]: Start difference. First operand has 1248 places, 1162 transitions, 2539 flow. Second operand 9 states and 10169 transitions. [2022-11-20 09:38:15,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1256 places, 1172 transitions, 2681 flow [2022-11-20 09:38:15,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1255 places, 1172 transitions, 2679 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:38:15,166 INFO L231 Difference]: Finished difference. Result has 1258 places, 1168 transitions, 2587 flow [2022-11-20 09:38:15,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=1247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2587, PETRI_PLACES=1258, PETRI_TRANSITIONS=1168} [2022-11-20 09:38:15,166 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 2 predicate places. [2022-11-20 09:38:15,167 INFO L495 AbstractCegarLoop]: Abstraction has has 1258 places, 1168 transitions, 2587 flow [2022-11-20 09:38:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1125.3) internal successors, (11253), 10 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:15,168 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:15,168 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:15,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-11-20 09:38:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-11-20 09:38:15,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:15,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1349226177, now seen corresponding path program 1 times [2022-11-20 09:38:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:15,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621365439] [2022-11-20 09:38:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:15,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621365439] [2022-11-20 09:38:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621365439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209598752] [2022-11-20 09:38:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:15,451 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:15,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-20 09:38:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:17,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 09:38:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:17,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:17,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209598752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:17,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:17,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 09:38:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739315677] [2022-11-20 09:38:17,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:17,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:38:17,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:38:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:38:17,353 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-20 09:38:17,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1258 places, 1168 transitions, 2587 flow. Second operand has 18 states, 18 states have (on average 1125.611111111111) internal successors, (20261), 18 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:17,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:17,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-20 09:38:17,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:19,777 INFO L130 PetriNetUnfolder]: 0/1899 cut-off events. [2022-11-20 09:38:19,777 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-11-20 09:38:19,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2748 conditions, 1899 events. 0/1899 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 6414 event pairs, 0 based on Foata normal form. 4/1903 useless extension candidates. Maximal degree in co-relation 0. Up to 143 conditions per place. [2022-11-20 09:38:19,781 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 59 selfloop transitions, 21 changer transitions 0/1192 dead transitions. [2022-11-20 09:38:19,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 1192 transitions, 2855 flow [2022-11-20 09:38:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 09:38:19,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 09:38:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23667 transitions. [2022-11-20 09:38:19,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.791988756148981 [2022-11-20 09:38:19,793 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 23667 transitions. [2022-11-20 09:38:19,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 23667 transitions. [2022-11-20 09:38:19,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:19,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 23667 transitions. [2022-11-20 09:38:19,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 1127.0) internal successors, (23667), 21 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:19,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 1423.0) internal successors, (31306), 22 states have internal predecessors, (31306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:19,992 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 1423.0) internal successors, (31306), 22 states have internal predecessors, (31306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:19,992 INFO L175 Difference]: Start difference. First operand has 1258 places, 1168 transitions, 2587 flow. Second operand 21 states and 23667 transitions. [2022-11-20 09:38:19,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 1192 transitions, 2855 flow [2022-11-20 09:38:19,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1277 places, 1192 transitions, 2841 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-20 09:38:20,003 INFO L231 Difference]: Finished difference. Result has 1282 places, 1181 transitions, 2711 flow [2022-11-20 09:38:20,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=1257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2711, PETRI_PLACES=1282, PETRI_TRANSITIONS=1181} [2022-11-20 09:38:20,004 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 26 predicate places. [2022-11-20 09:38:20,004 INFO L495 AbstractCegarLoop]: Abstraction has has 1282 places, 1181 transitions, 2711 flow [2022-11-20 09:38:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1125.611111111111) internal successors, (20261), 18 states have internal predecessors, (20261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:20,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:20,006 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:20,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-11-20 09:38:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-11-20 09:38:20,206 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 728912419, now seen corresponding path program 1 times [2022-11-20 09:38:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:20,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140747519] [2022-11-20 09:38:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:20,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:20,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:20,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140747519] [2022-11-20 09:38:20,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140747519] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:20,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444851108] [2022-11-20 09:38:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:20,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:20,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:20,400 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:20,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-11-20 09:38:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 09:38:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:22,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:22,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444851108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:22,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:22,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 09:38:22,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571512148] [2022-11-20 09:38:22,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:22,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 09:38:22,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:22,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 09:38:22,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 09:38:22,572 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-20 09:38:22,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1282 places, 1181 transitions, 2711 flow. Second operand has 34 states, 34 states have (on average 1125.7941176470588) internal successors, (38277), 34 states have internal predecessors, (38277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:22,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:22,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-20 09:38:22,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:25,077 INFO L130 PetriNetUnfolder]: 0/1811 cut-off events. [2022-11-20 09:38:25,077 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-20 09:38:25,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1811 events. 0/1811 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 5838 event pairs, 0 based on Foata normal form. 8/1819 useless extension candidates. Maximal degree in co-relation 0. Up to 111 conditions per place. [2022-11-20 09:38:25,081 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 75 selfloop transitions, 45 changer transitions 0/1232 dead transitions. [2022-11-20 09:38:25,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1326 places, 1232 transitions, 3267 flow [2022-11-20 09:38:25,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 09:38:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-20 09:38:25,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50663 transitions. [2022-11-20 09:38:25,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7911767002420551 [2022-11-20 09:38:25,104 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 50663 transitions. [2022-11-20 09:38:25,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 50663 transitions. [2022-11-20 09:38:25,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:25,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 50663 transitions. [2022-11-20 09:38:25,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 1125.8444444444444) internal successors, (50663), 45 states have internal predecessors, (50663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:25,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 1423.0) internal successors, (65458), 46 states have internal predecessors, (65458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:25,375 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 1423.0) internal successors, (65458), 46 states have internal predecessors, (65458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:25,375 INFO L175 Difference]: Start difference. First operand has 1282 places, 1181 transitions, 2711 flow. Second operand 45 states and 50663 transitions. [2022-11-20 09:38:25,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1326 places, 1232 transitions, 3267 flow [2022-11-20 09:38:25,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1320 places, 1232 transitions, 3227 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-20 09:38:25,396 INFO L231 Difference]: Finished difference. Result has 1329 places, 1206 transitions, 2989 flow [2022-11-20 09:38:25,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=1276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2989, PETRI_PLACES=1329, PETRI_TRANSITIONS=1206} [2022-11-20 09:38:25,397 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 73 predicate places. [2022-11-20 09:38:25,397 INFO L495 AbstractCegarLoop]: Abstraction has has 1329 places, 1206 transitions, 2989 flow [2022-11-20 09:38:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1125.7941176470588) internal successors, (38277), 34 states have internal predecessors, (38277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:25,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:25,402 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:25,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-11-20 09:38:25,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-11-20 09:38:25,603 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1947848983, now seen corresponding path program 1 times [2022-11-20 09:38:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:25,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733658207] [2022-11-20 09:38:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:25,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:26,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733658207] [2022-11-20 09:38:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733658207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:26,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189250252] [2022-11-20 09:38:26,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:26,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:26,343 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:26,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-20 09:38:28,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 09:38:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:28,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:29,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189250252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:29,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:29,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-11-20 09:38:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591896970] [2022-11-20 09:38:29,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:29,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 09:38:29,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:29,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 09:38:29,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2022-11-20 09:38:29,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-20 09:38:29,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1329 places, 1206 transitions, 2989 flow. Second operand has 66 states, 66 states have (on average 1125.8939393939395) internal successors, (74309), 66 states have internal predecessors, (74309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:29,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:29,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-20 09:38:29,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:33,514 INFO L130 PetriNetUnfolder]: 0/1635 cut-off events. [2022-11-20 09:38:33,515 INFO L131 PetriNetUnfolder]: For 3434/3434 co-relation queries the response was YES. [2022-11-20 09:38:33,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2905 conditions, 1635 events. 0/1635 cut-off events. For 3434/3434 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 4686 event pairs, 0 based on Foata normal form. 16/1651 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 09:38:33,518 INFO L137 encePairwiseOnDemand]: 1417/1423 looper letters, 107 selfloop transitions, 93 changer transitions 0/1312 dead transitions. [2022-11-20 09:38:33,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1421 places, 1312 transitions, 4237 flow [2022-11-20 09:38:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-20 09:38:33,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-20 09:38:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104655 transitions. [2022-11-20 09:38:33,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7908099653163466 [2022-11-20 09:38:33,563 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 104655 transitions. [2022-11-20 09:38:33,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104655 transitions. [2022-11-20 09:38:33,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:33,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 104655 transitions. [2022-11-20 09:38:33,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 1125.3225806451612) internal successors, (104655), 93 states have internal predecessors, (104655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:33,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 1423.0) internal successors, (133762), 94 states have internal predecessors, (133762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:33,713 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 1423.0) internal successors, (133762), 94 states have internal predecessors, (133762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:33,713 INFO L175 Difference]: Start difference. First operand has 1329 places, 1206 transitions, 2989 flow. Second operand 93 states and 104655 transitions. [2022-11-20 09:38:33,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1421 places, 1312 transitions, 4237 flow [2022-11-20 09:38:33,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1403 places, 1312 transitions, 4149 flow, removed 26 selfloop flow, removed 18 redundant places. [2022-11-20 09:38:33,740 INFO L231 Difference]: Finished difference. Result has 1420 places, 1255 transitions, 3623 flow [2022-11-20 09:38:33,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=2933, PETRI_DIFFERENCE_MINUEND_PLACES=1311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=3623, PETRI_PLACES=1420, PETRI_TRANSITIONS=1255} [2022-11-20 09:38:33,741 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 164 predicate places. [2022-11-20 09:38:33,741 INFO L495 AbstractCegarLoop]: Abstraction has has 1420 places, 1255 transitions, 3623 flow [2022-11-20 09:38:33,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1125.8939393939395) internal successors, (74309), 66 states have internal predecessors, (74309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:33,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:33,746 INFO L209 CegarLoopForPetriNet]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:33,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-11-20 09:38:33,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-11-20 09:38:33,947 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash 564916159, now seen corresponding path program 1 times [2022-11-20 09:38:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:33,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383590734] [2022-11-20 09:38:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:33,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:36,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383590734] [2022-11-20 09:38:36,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383590734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:36,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395273819] [2022-11-20 09:38:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:36,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:36,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:36,405 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:36,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-20 09:38:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 09:38:38,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:38,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4681 backedges. 0 proven. 4681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:42,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395273819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:42,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:42,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-11-20 09:38:42,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851540819] [2022-11-20 09:38:42,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:42,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-20 09:38:42,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-20 09:38:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4290, Invalid=12480, Unknown=0, NotChecked=0, Total=16770 [2022-11-20 09:38:42,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1123 out of 1423 [2022-11-20 09:38:42,369 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1420 places, 1255 transitions, 3623 flow. Second operand has 130 states, 130 states have (on average 1125.946153846154) internal successors, (146373), 130 states have internal predecessors, (146373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:42,369 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:42,369 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1123 of 1423 [2022-11-20 09:38:42,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:47,944 INFO L130 PetriNetUnfolder]: 0/1514 cut-off events. [2022-11-20 09:38:47,944 INFO L131 PetriNetUnfolder]: For 6165/6165 co-relation queries the response was YES. [2022-11-20 09:38:47,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2760 conditions, 1514 events. 0/1514 cut-off events. For 6165/6165 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 3913 event pairs, 0 based on Foata normal form. 11/1525 useless extension candidates. Maximal degree in co-relation 0. Up to 78 conditions per place. [2022-11-20 09:38:47,946 INFO L137 encePairwiseOnDemand]: 1418/1423 looper letters, 126 selfloop transitions, 124 changer transitions 0/1352 dead transitions. [2022-11-20 09:38:47,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1534 places, 1352 transitions, 4997 flow [2022-11-20 09:38:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-20 09:38:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-20 09:38:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141759 transitions. [2022-11-20 09:38:48,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7906334705350868 [2022-11-20 09:38:48,132 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 141759 transitions. [2022-11-20 09:38:48,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 141759 transitions. [2022-11-20 09:38:48,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:48,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 141759 transitions. [2022-11-20 09:38:48,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 1125.0714285714287) internal successors, (141759), 126 states have internal predecessors, (141759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:48,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 1423.0) internal successors, (180721), 127 states have internal predecessors, (180721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:48,327 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 1423.0) internal successors, (180721), 127 states have internal predecessors, (180721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:48,327 INFO L175 Difference]: Start difference. First operand has 1420 places, 1255 transitions, 3623 flow. Second operand 126 states and 141759 transitions. [2022-11-20 09:38:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1534 places, 1352 transitions, 4997 flow [2022-11-20 09:38:48,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1461 places, 1352 transitions, 4575 flow, removed 28 selfloop flow, removed 73 redundant places. [2022-11-20 09:38:48,351 INFO L231 Difference]: Finished difference. Result has 1461 places, 1274 transitions, 3807 flow [2022-11-20 09:38:48,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1423, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=1336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=3807, PETRI_PLACES=1461, PETRI_TRANSITIONS=1274} [2022-11-20 09:38:48,352 INFO L288 CegarLoopForPetriNet]: 1256 programPoint places, 205 predicate places. [2022-11-20 09:38:48,352 INFO L495 AbstractCegarLoop]: Abstraction has has 1461 places, 1274 transitions, 3807 flow [2022-11-20 09:38:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1125.946153846154) internal successors, (146373), 130 states have internal predecessors, (146373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:48,363 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:48,363 INFO L209 CegarLoopForPetriNet]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:48,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-11-20 09:38:48,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:48,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:48,564 INFO L85 PathProgramCache]: Analyzing trace with hash 459226242, now seen corresponding path program 1 times [2022-11-20 09:38:48,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:48,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550813415] [2022-11-20 09:38:48,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:48,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:38:48,647 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 09:38:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 09:38:48,857 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 09:38:48,858 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 09:38:48,858 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 09:38:48,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 09:38:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270 [2022-11-20 09:38:48,858 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:38:48,858 WARN L233 ceAbstractionStarter]: 41 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 09:38:48,858 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 42 thread instances. [2022-11-20 09:38:48,973 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 09:38:48,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1285 places, 1456 transitions, 4844 flow [2022-11-20 09:38:51,771 INFO L130 PetriNetUnfolder]: 424/2963 cut-off events. [2022-11-20 09:38:51,771 INFO L131 PetriNetUnfolder]: For 13202/13202 co-relation queries the response was YES. [2022-11-20 09:38:51,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3993 conditions, 2963 events. 424/2963 cut-off events. For 13202/13202 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 10903 event pairs, 0 based on Foata normal form. 0/2453 useless extension candidates. Maximal degree in co-relation 3851. Up to 86 conditions per place. [2022-11-20 09:38:51,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 1285 places, 1456 transitions, 4844 flow [2022-11-20 09:38:52,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1285 places, 1456 transitions, 4844 flow [2022-11-20 09:38:52,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:38:52,019 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;@5fb9732f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:38:52,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 09:38:52,023 INFO L130 PetriNetUnfolder]: 2/71 cut-off events. [2022-11-20 09:38:52,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:38:52,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:52,024 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] [2022-11-20 09:38:52,024 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1491620511, now seen corresponding path program 1 times [2022-11-20 09:38:52,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:52,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241523334] [2022-11-20 09:38:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:52,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241523334] [2022-11-20 09:38:52,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241523334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:38:52,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:38:52,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:38:52,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780915423] [2022-11-20 09:38:52,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:38:52,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:38:52,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:38:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:38:52,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1157 out of 1456 [2022-11-20 09:38:52,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1285 places, 1456 transitions, 4844 flow. Second operand has 2 states, 2 states have (on average 1157.5) internal successors, (2315), 2 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:52,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:52,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1157 of 1456 [2022-11-20 09:38:52,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:54,586 INFO L130 PetriNetUnfolder]: 0/2496 cut-off events. [2022-11-20 09:38:54,586 INFO L131 PetriNetUnfolder]: For 14105/14105 co-relation queries the response was YES. [2022-11-20 09:38:54,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3569 conditions, 2496 events. 0/2496 cut-off events. For 14105/14105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 10329 event pairs, 0 based on Foata normal form. 5346/7756 useless extension candidates. Maximal degree in co-relation 0. Up to 43 conditions per place. [2022-11-20 09:38:54,590 INFO L137 encePairwiseOnDemand]: 1200/1456 looper letters, 42 selfloop transitions, 0 changer transitions 11/1199 dead transitions. [2022-11-20 09:38:54,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1285 places, 1199 transitions, 4414 flow [2022-11-20 09:38:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:38:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 09:38:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2612 transitions. [2022-11-20 09:38:54,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.896978021978022 [2022-11-20 09:38:54,593 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 2612 transitions. [2022-11-20 09:38:54,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 2612 transitions. [2022-11-20 09:38:54,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:54,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 2612 transitions. [2022-11-20 09:38:54,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 1306.0) internal successors, (2612), 2 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:54,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 1456.0) internal successors, (4368), 3 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:54,597 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 1456.0) internal successors, (4368), 3 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:54,597 INFO L175 Difference]: Start difference. First operand has 1285 places, 1456 transitions, 4844 flow. Second operand 2 states and 2612 transitions. [2022-11-20 09:38:54,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1285 places, 1199 transitions, 4414 flow [2022-11-20 09:38:54,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1285 places, 1199 transitions, 2692 flow, removed 861 selfloop flow, removed 0 redundant places. [2022-11-20 09:38:54,623 INFO L231 Difference]: Finished difference. Result has 1285 places, 1188 transitions, 2586 flow [2022-11-20 09:38:54,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=1284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=2586, PETRI_PLACES=1285, PETRI_TRANSITIONS=1188} [2022-11-20 09:38:54,624 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, 0 predicate places. [2022-11-20 09:38:54,624 INFO L495 AbstractCegarLoop]: Abstraction has has 1285 places, 1188 transitions, 2586 flow [2022-11-20 09:38:54,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1157.5) internal successors, (2315), 2 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:54,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:54,624 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] [2022-11-20 09:38:54,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271 [2022-11-20 09:38:54,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1006395426, now seen corresponding path program 1 times [2022-11-20 09:38:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:54,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310608992] [2022-11-20 09:38:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:54,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:54,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310608992] [2022-11-20 09:38:54,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310608992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:38:54,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:38:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:38:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544978094] [2022-11-20 09:38:54,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:38:54,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:38:54,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:38:54,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:38:54,662 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1150 out of 1456 [2022-11-20 09:38:54,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1285 places, 1188 transitions, 2586 flow. Second operand has 3 states, 3 states have (on average 1151.0) internal successors, (3453), 3 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:54,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:54,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1150 of 1456 [2022-11-20 09:38:54,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:38:56,945 INFO L130 PetriNetUnfolder]: 0/2012 cut-off events. [2022-11-20 09:38:56,946 INFO L131 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2022-11-20 09:38:56,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2439 conditions, 2012 events. 0/2012 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 7042 event pairs, 0 based on Foata normal form. 0/1970 useless extension candidates. Maximal degree in co-relation 0. Up to 252 conditions per place. [2022-11-20 09:38:56,949 INFO L137 encePairwiseOnDemand]: 1453/1456 looper letters, 51 selfloop transitions, 2 changer transitions 0/1192 dead transitions. [2022-11-20 09:38:56,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1276 places, 1192 transitions, 2700 flow [2022-11-20 09:38:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:38:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:38:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 3504 transitions. [2022-11-20 09:38:56,952 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8021978021978022 [2022-11-20 09:38:56,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 3504 transitions. [2022-11-20 09:38:56,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 3504 transitions. [2022-11-20 09:38:56,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:38:56,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 3504 transitions. [2022-11-20 09:38:56,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1168.0) internal successors, (3504), 3 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:56,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 1456.0) internal successors, (5824), 4 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:56,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 1456.0) internal successors, (5824), 4 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:56,957 INFO L175 Difference]: Start difference. First operand has 1285 places, 1188 transitions, 2586 flow. Second operand 3 states and 3504 transitions. [2022-11-20 09:38:56,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1276 places, 1192 transitions, 2700 flow [2022-11-20 09:38:56,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1276 places, 1192 transitions, 2700 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 09:38:56,967 INFO L231 Difference]: Finished difference. Result has 1277 places, 1189 transitions, 2598 flow [2022-11-20 09:38:56,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=1456, PETRI_DIFFERENCE_MINUEND_FLOW=2586, PETRI_DIFFERENCE_MINUEND_PLACES=1274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2598, PETRI_PLACES=1277, PETRI_TRANSITIONS=1189} [2022-11-20 09:38:56,967 INFO L288 CegarLoopForPetriNet]: 1285 programPoint places, -8 predicate places. [2022-11-20 09:38:56,967 INFO L495 AbstractCegarLoop]: Abstraction has has 1277 places, 1189 transitions, 2598 flow [2022-11-20 09:38:56,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1151.0) internal successors, (3453), 3 states have internal predecessors, (3453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:56,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:38:56,968 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] [2022-11-20 09:38:56,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272 [2022-11-20 09:38:56,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 09:38:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:38:56,968 INFO L85 PathProgramCache]: Analyzing trace with hash 718573878, now seen corresponding path program 1 times [2022-11-20 09:38:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:38:56,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853385149] [2022-11-20 09:38:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:56,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:38:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:57,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:38:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853385149] [2022-11-20 09:38:57,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853385149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:38:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154200963] [2022-11-20 09:38:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:38:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:38:57,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:38:57,172 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:38:57,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a41b4fd-86e5-46a3-9b50-825f26f25621/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-11-20 09:38:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:38:59,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 09:38:59,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:38:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:59,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:38:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:38:59,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154200963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:38:59,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:38:59,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 09:38:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301407689] [2022-11-20 09:38:59,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:38:59,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:38:59,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:38:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:38:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:38:59,071 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 1149 out of 1456 [2022-11-20 09:38:59,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1277 places, 1189 transitions, 2598 flow. Second operand has 10 states, 10 states have (on average 1151.3) internal successors, (11513), 10 states have internal predecessors, (11513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:38:59,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:38:59,075 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1149 of 1456 [2022-11-20 09:38:59,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand