./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-8393723 [2022-11-18 20:46:19,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:46:19,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:46:19,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:46:19,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:46:19,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:46:19,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:46:19,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:46:19,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:46:19,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:46:19,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:46:19,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:46:19,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:46:19,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:46:19,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:46:19,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:46:19,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:46:19,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:46:19,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:46:19,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:46:19,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:46:19,442 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:46:19,443 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:46:19,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:46:19,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:46:19,448 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:46:19,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:46:19,449 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:46:19,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:46:19,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:46:19,451 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:46:19,452 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:46:19,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:46:19,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:46:19,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:46:19,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:46:19,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:46:19,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:46:19,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:46:19,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:46:19,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:46:19,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:46:19,484 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:46:19,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:46:19,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:46:19,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:46:19,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:46:19,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:46:19,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:46:19,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:46:19,487 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:46:19,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:46:19,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:46:19,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:46:19,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:46:19,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:46:19,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:46:19,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:46:19,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:46:19,490 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:46:19,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:46:19,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:46:19,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:46:19,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:46:19,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:46:19,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:46:19,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:46:19,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:46:19,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:46:19,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:46:19,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:46:19,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:46:19,494 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:46:19,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:46:19,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:46:19,495 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_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-11-18 20:46:19,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:46:19,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:46:19,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:46:19,789 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:46:19,790 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:46:19,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-18 20:46:19,861 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/data/a5ed8d256/1c4bdbe2274f402db15cd6bb490e91db/FLAG239242c04 [2022-11-18 20:46:20,334 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:46:20,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-11-18 20:46:20,341 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/data/a5ed8d256/1c4bdbe2274f402db15cd6bb490e91db/FLAG239242c04 [2022-11-18 20:46:20,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/data/a5ed8d256/1c4bdbe2274f402db15cd6bb490e91db [2022-11-18 20:46:20,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:46:20,747 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:46:20,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:46:20,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:46:20,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:46:20,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:46:20" (1/1) ... [2022-11-18 20:46:20,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@297e5b53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:20, skipping insertion in model container [2022-11-18 20:46:20,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:46:20" (1/1) ... [2022-11-18 20:46:20,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:46:20,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:46:21,037 WARN L234 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_18016a3c-e7f1-4472-bf2f-1e568e3333fb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-18 20:46:21,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:46:21,071 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:46:21,116 WARN L234 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_18016a3c-e7f1-4472-bf2f-1e568e3333fb/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-11-18 20:46:21,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:46:21,148 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:46:21,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21 WrapperNode [2022-11-18 20:46:21,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:46:21,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:46:21,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:46:21,150 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:46:21,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,203 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 105 [2022-11-18 20:46:21,204 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:46:21,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:46:21,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:46:21,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:46:21,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:46:21,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:46:21,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:46:21,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:46:21,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (1/1) ... [2022-11-18 20:46:21,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:46:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:21,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:46:21,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:46:21,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:46:21,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:46:21,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:46:21,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:46:21,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:46:21,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:46:21,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:46:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:46:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:46:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:46:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:46:21,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:46:21,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:46:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:46:21,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:46:21,333 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:46:21,444 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:46:21,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:46:21,759 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:46:21,768 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:46:21,768 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:46:21,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:46:21 BoogieIcfgContainer [2022-11-18 20:46:21,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:46:21,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:46:21,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:46:21,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:46:21,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:46:20" (1/3) ... [2022-11-18 20:46:21,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f7608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:46:21, skipping insertion in model container [2022-11-18 20:46:21,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:46:21" (2/3) ... [2022-11-18 20:46:21,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36f7608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:46:21, skipping insertion in model container [2022-11-18 20:46:21,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:46:21" (3/3) ... [2022-11-18 20:46:21,779 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-11-18 20:46:21,788 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:46:21,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:46:21,799 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:46:21,799 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:46:22,003 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:46:22,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 184 transitions, 392 flow [2022-11-18 20:46:22,212 INFO L130 PetriNetUnfolder]: 15/181 cut-off events. [2022-11-18 20:46:22,212 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:46:22,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 181 events. 15/181 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 192 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 2 conditions per place. [2022-11-18 20:46:22,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 184 transitions, 392 flow [2022-11-18 20:46:22,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 170 transitions, 358 flow [2022-11-18 20:46:22,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:46:22,244 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;@6d723c15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:46:22,245 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 20:46:22,326 INFO L130 PetriNetUnfolder]: 15/169 cut-off events. [2022-11-18 20:46:22,326 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:46:22,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:22,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:22,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1546474655, now seen corresponding path program 1 times [2022-11-18 20:46:22,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:22,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455717347] [2022-11-18 20:46:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:22,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:22,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:22,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455717347] [2022-11-18 20:46:22,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455717347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:22,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:22,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:46:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548463761] [2022-11-18 20:46:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:22,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:46:22,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:22,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:46:22,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:46:22,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 184 [2022-11-18 20:46:22,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 170 transitions, 358 flow. Second operand has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:22,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:22,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 184 [2022-11-18 20:46:22,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:22,895 INFO L130 PetriNetUnfolder]: 7/162 cut-off events. [2022-11-18 20:46:22,895 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-18 20:46:22,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 162 events. 7/162 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 0 based on Foata normal form. 14/165 useless extension candidates. Maximal degree in co-relation 130. Up to 7 conditions per place. [2022-11-18 20:46:22,915 INFO L137 encePairwiseOnDemand]: 176/184 looper letters, 6 selfloop transitions, 0 changer transitions 4/162 dead transitions. [2022-11-18 20:46:22,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 162 transitions, 354 flow [2022-11-18 20:46:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:46:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:46:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 352 transitions. [2022-11-18 20:46:22,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9565217391304348 [2022-11-18 20:46:22,952 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 352 transitions. [2022-11-18 20:46:22,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 352 transitions. [2022-11-18 20:46:22,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:22,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 352 transitions. [2022-11-18 20:46:22,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 176.0) internal successors, (352), 2 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:22,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:22,994 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:22,997 INFO L175 Difference]: Start difference. First operand has 165 places, 170 transitions, 358 flow. Second operand 2 states and 352 transitions. [2022-11-18 20:46:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 162 transitions, 354 flow [2022-11-18 20:46:23,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 162 transitions, 342 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 20:46:23,014 INFO L231 Difference]: Finished difference. Result has 160 places, 158 transitions, 322 flow [2022-11-18 20:46:23,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=160, PETRI_TRANSITIONS=158} [2022-11-18 20:46:23,023 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, -5 predicate places. [2022-11-18 20:46:23,024 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 158 transitions, 322 flow [2022-11-18 20:46:23,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 174.0) internal successors, (348), 2 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:23,024 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:23,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:46:23,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:23,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:23,027 INFO L85 PathProgramCache]: Analyzing trace with hash 542375553, now seen corresponding path program 1 times [2022-11-18 20:46:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:23,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842705718] [2022-11-18 20:46:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:23,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:23,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:23,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842705718] [2022-11-18 20:46:23,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842705718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:23,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:23,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:46:23,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972629118] [2022-11-18 20:46:23,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:23,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:46:23,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:46:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:46:23,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 184 [2022-11-18 20:46:23,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 158 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:23,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:23,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 184 [2022-11-18 20:46:23,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:24,081 INFO L130 PetriNetUnfolder]: 175/665 cut-off events. [2022-11-18 20:46:24,082 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 20:46:24,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 920 conditions, 665 events. 175/665 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3322 event pairs, 74 based on Foata normal form. 1/527 useless extension candidates. Maximal degree in co-relation 917. Up to 225 conditions per place. [2022-11-18 20:46:24,092 INFO L137 encePairwiseOnDemand]: 174/184 looper letters, 41 selfloop transitions, 6 changer transitions 4/166 dead transitions. [2022-11-18 20:46:24,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 166 transitions, 440 flow [2022-11-18 20:46:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:46:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:46:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1076 transitions. [2022-11-18 20:46:24,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7309782608695652 [2022-11-18 20:46:24,102 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1076 transitions. [2022-11-18 20:46:24,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1076 transitions. [2022-11-18 20:46:24,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:24,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1076 transitions. [2022-11-18 20:46:24,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.5) internal successors, (1076), 8 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:24,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:24,112 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 184.0) internal successors, (1656), 9 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:24,113 INFO L175 Difference]: Start difference. First operand has 160 places, 158 transitions, 322 flow. Second operand 8 states and 1076 transitions. [2022-11-18 20:46:24,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 166 transitions, 440 flow [2022-11-18 20:46:24,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 166 transitions, 440 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:46:24,120 INFO L231 Difference]: Finished difference. Result has 167 places, 159 transitions, 350 flow [2022-11-18 20:46:24,120 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=167, PETRI_TRANSITIONS=159} [2022-11-18 20:46:24,121 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 2 predicate places. [2022-11-18 20:46:24,121 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 159 transitions, 350 flow [2022-11-18 20:46:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 132.5) internal successors, (1060), 8 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:24,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:24,123 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:46:24,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -730941901, now seen corresponding path program 1 times [2022-11-18 20:46:24,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:24,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248737322] [2022-11-18 20:46:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:24,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248737322] [2022-11-18 20:46:24,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248737322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:24,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:24,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:46:24,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810813190] [2022-11-18 20:46:24,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:24,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:46:24,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:24,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:46:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:46:24,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 184 [2022-11-18 20:46:24,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 159 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:24,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:24,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 184 [2022-11-18 20:46:24,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:25,149 INFO L130 PetriNetUnfolder]: 224/1098 cut-off events. [2022-11-18 20:46:25,149 INFO L131 PetriNetUnfolder]: For 45/46 co-relation queries the response was YES. [2022-11-18 20:46:25,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 1098 events. 224/1098 cut-off events. For 45/46 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7286 event pairs, 34 based on Foata normal form. 1/988 useless extension candidates. Maximal degree in co-relation 1450. Up to 149 conditions per place. [2022-11-18 20:46:25,161 INFO L137 encePairwiseOnDemand]: 175/184 looper letters, 62 selfloop transitions, 9 changer transitions 4/200 dead transitions. [2022-11-18 20:46:25,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 200 transitions, 594 flow [2022-11-18 20:46:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:46:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:46:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1035 transitions. [2022-11-18 20:46:25,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8035714285714286 [2022-11-18 20:46:25,166 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1035 transitions. [2022-11-18 20:46:25,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1035 transitions. [2022-11-18 20:46:25,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:25,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1035 transitions. [2022-11-18 20:46:25,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.85714285714286) internal successors, (1035), 7 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) [2022-11-18 20:46:25,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:25,173 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 184.0) internal successors, (1472), 8 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:25,173 INFO L175 Difference]: Start difference. First operand has 167 places, 159 transitions, 350 flow. Second operand 7 states and 1035 transitions. [2022-11-18 20:46:25,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 200 transitions, 594 flow [2022-11-18 20:46:25,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 200 transitions, 576 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-18 20:46:25,206 INFO L231 Difference]: Finished difference. Result has 168 places, 165 transitions, 385 flow [2022-11-18 20:46:25,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=385, PETRI_PLACES=168, PETRI_TRANSITIONS=165} [2022-11-18 20:46:25,208 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 3 predicate places. [2022-11-18 20:46:25,208 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 165 transitions, 385 flow [2022-11-18 20:46:25,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:25,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:25,209 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:46:25,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:25,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1785722789, now seen corresponding path program 1 times [2022-11-18 20:46:25,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:25,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889238591] [2022-11-18 20:46:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:25,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:25,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:25,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889238591] [2022-11-18 20:46:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889238591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031980491] [2022-11-18 20:46:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:25,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:25,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:46:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:46:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:26,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031980491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:26,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:26,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 20:46:26,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026282352] [2022-11-18 20:46:26,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:46:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:46:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:46:26,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-18 20:46:26,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 165 transitions, 385 flow. Second operand has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 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) [2022-11-18 20:46:26,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:26,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-18 20:46:26,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:26,923 INFO L130 PetriNetUnfolder]: 270/1248 cut-off events. [2022-11-18 20:46:26,923 INFO L131 PetriNetUnfolder]: For 81/90 co-relation queries the response was YES. [2022-11-18 20:46:26,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 1248 events. 270/1248 cut-off events. For 81/90 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8252 event pairs, 103 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 1815. Up to 188 conditions per place. [2022-11-18 20:46:26,939 INFO L137 encePairwiseOnDemand]: 171/184 looper letters, 46 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2022-11-18 20:46:26,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 193 transitions, 575 flow [2022-11-18 20:46:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:46:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:46:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1933 transitions. [2022-11-18 20:46:26,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8081103678929766 [2022-11-18 20:46:26,946 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1933 transitions. [2022-11-18 20:46:26,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1933 transitions. [2022-11-18 20:46:26,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:26,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1933 transitions. [2022-11-18 20:46:26,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 148.69230769230768) internal successors, (1933), 13 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:26,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:26,959 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:26,959 INFO L175 Difference]: Start difference. First operand has 168 places, 165 transitions, 385 flow. Second operand 13 states and 1933 transitions. [2022-11-18 20:46:26,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 193 transitions, 575 flow [2022-11-18 20:46:26,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 193 transitions, 571 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 20:46:26,966 INFO L231 Difference]: Finished difference. Result has 182 places, 172 transitions, 457 flow [2022-11-18 20:46:26,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=457, PETRI_PLACES=182, PETRI_TRANSITIONS=172} [2022-11-18 20:46:26,967 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 17 predicate places. [2022-11-18 20:46:26,967 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 172 transitions, 457 flow [2022-11-18 20:46:26,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 146.73684210526315) internal successors, (2788), 19 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) [2022-11-18 20:46:26,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:26,969 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:26,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:27,176 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1381296401, now seen corresponding path program 1 times [2022-11-18 20:46:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:27,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113623526] [2022-11-18 20:46:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:27,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:27,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:27,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113623526] [2022-11-18 20:46:27,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113623526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:27,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:27,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:46:27,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987598652] [2022-11-18 20:46:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:27,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:46:27,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:46:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:46:27,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-18 20:46:27,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 172 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:27,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-18 20:46:27,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:27,571 INFO L130 PetriNetUnfolder]: 106/711 cut-off events. [2022-11-18 20:46:27,571 INFO L131 PetriNetUnfolder]: For 94/116 co-relation queries the response was YES. [2022-11-18 20:46:27,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 711 events. 106/711 cut-off events. For 94/116 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3852 event pairs, 7 based on Foata normal form. 7/658 useless extension candidates. Maximal degree in co-relation 1056. Up to 104 conditions per place. [2022-11-18 20:46:27,578 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 22 selfloop transitions, 8 changer transitions 0/185 dead transitions. [2022-11-18 20:46:27,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 557 flow [2022-11-18 20:46:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:46:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:46:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 829 transitions. [2022-11-18 20:46:27,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010869565217391 [2022-11-18 20:46:27,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 829 transitions. [2022-11-18 20:46:27,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 829 transitions. [2022-11-18 20:46:27,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:27,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 829 transitions. [2022-11-18 20:46:27,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,588 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,588 INFO L175 Difference]: Start difference. First operand has 182 places, 172 transitions, 457 flow. Second operand 5 states and 829 transitions. [2022-11-18 20:46:27,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 557 flow [2022-11-18 20:46:27,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 185 transitions, 542 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-18 20:46:27,595 INFO L231 Difference]: Finished difference. Result has 185 places, 176 transitions, 492 flow [2022-11-18 20:46:27,596 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=185, PETRI_TRANSITIONS=176} [2022-11-18 20:46:27,599 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 20 predicate places. [2022-11-18 20:46:27,600 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 176 transitions, 492 flow [2022-11-18 20:46:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:27,601 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:27,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:46:27,601 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:27,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1992931229, now seen corresponding path program 1 times [2022-11-18 20:46:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:27,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976966153] [2022-11-18 20:46:27,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:27,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:27,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976966153] [2022-11-18 20:46:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976966153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:27,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:46:27,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:46:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067042119] [2022-11-18 20:46:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:46:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:46:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:46:27,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-18 20:46:27,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 176 transitions, 492 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:27,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:27,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-18 20:46:27,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:28,029 INFO L130 PetriNetUnfolder]: 142/851 cut-off events. [2022-11-18 20:46:28,030 INFO L131 PetriNetUnfolder]: For 216/254 co-relation queries the response was YES. [2022-11-18 20:46:28,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1345 conditions, 851 events. 142/851 cut-off events. For 216/254 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5136 event pairs, 11 based on Foata normal form. 3/792 useless extension candidates. Maximal degree in co-relation 1329. Up to 158 conditions per place. [2022-11-18 20:46:28,037 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 21 selfloop transitions, 7 changer transitions 0/188 dead transitions. [2022-11-18 20:46:28,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 188 transitions, 583 flow [2022-11-18 20:46:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:46:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:46:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 828 transitions. [2022-11-18 20:46:28,041 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9 [2022-11-18 20:46:28,041 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 828 transitions. [2022-11-18 20:46:28,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 828 transitions. [2022-11-18 20:46:28,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:28,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 828 transitions. [2022-11-18 20:46:28,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:28,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:28,046 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:28,047 INFO L175 Difference]: Start difference. First operand has 185 places, 176 transitions, 492 flow. Second operand 5 states and 828 transitions. [2022-11-18 20:46:28,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 188 transitions, 583 flow [2022-11-18 20:46:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 188 transitions, 583 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:46:28,053 INFO L231 Difference]: Finished difference. Result has 192 places, 180 transitions, 536 flow [2022-11-18 20:46:28,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=192, PETRI_TRANSITIONS=180} [2022-11-18 20:46:28,054 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 27 predicate places. [2022-11-18 20:46:28,054 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 180 transitions, 536 flow [2022-11-18 20:46:28,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:28,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:28,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:28,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:46:28,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:28,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1730974201, now seen corresponding path program 1 times [2022-11-18 20:46:28,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:28,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137846357] [2022-11-18 20:46:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:28,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:28,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:28,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137846357] [2022-11-18 20:46:28,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137846357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764107080] [2022-11-18 20:46:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:28,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:28,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:28,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:46:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:46:28,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:29,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:29,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764107080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:29,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:29,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-18 20:46:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89976064] [2022-11-18 20:46:29,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:46:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:46:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:46:29,573 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 184 [2022-11-18 20:46:29,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 180 transitions, 536 flow. Second operand has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:29,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:29,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 184 [2022-11-18 20:46:29,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:31,636 INFO L130 PetriNetUnfolder]: 1389/4440 cut-off events. [2022-11-18 20:46:31,637 INFO L131 PetriNetUnfolder]: For 1388/1450 co-relation queries the response was YES. [2022-11-18 20:46:31,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 4440 events. 1389/4440 cut-off events. For 1388/1450 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 40310 event pairs, 871 based on Foata normal form. 33/3994 useless extension candidates. Maximal degree in co-relation 8815. Up to 1413 conditions per place. [2022-11-18 20:46:31,676 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 71 selfloop transitions, 21 changer transitions 0/216 dead transitions. [2022-11-18 20:46:31,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 216 transitions, 815 flow [2022-11-18 20:46:31,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:46:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 20:46:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2411 transitions. [2022-11-18 20:46:31,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6896453089244852 [2022-11-18 20:46:31,683 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2411 transitions. [2022-11-18 20:46:31,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2411 transitions. [2022-11-18 20:46:31,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:31,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2411 transitions. [2022-11-18 20:46:31,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 126.89473684210526) internal successors, (2411), 19 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:31,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:31,699 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 184.0) internal successors, (3680), 20 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:31,699 INFO L175 Difference]: Start difference. First operand has 192 places, 180 transitions, 536 flow. Second operand 19 states and 2411 transitions. [2022-11-18 20:46:31,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 216 transitions, 815 flow [2022-11-18 20:46:31,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 216 transitions, 815 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:46:31,712 INFO L231 Difference]: Finished difference. Result has 217 places, 187 transitions, 627 flow [2022-11-18 20:46:31,713 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=627, PETRI_PLACES=217, PETRI_TRANSITIONS=187} [2022-11-18 20:46:31,713 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 52 predicate places. [2022-11-18 20:46:31,713 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 187 transitions, 627 flow [2022-11-18 20:46:31,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 125.45161290322581) internal successors, (3889), 31 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:31,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:31,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:31,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:31,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:31,922 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash 332117874, now seen corresponding path program 1 times [2022-11-18 20:46:31,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:31,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113747999] [2022-11-18 20:46:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:32,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113747999] [2022-11-18 20:46:32,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113747999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:32,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910187703] [2022-11-18 20:46:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:32,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:32,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:32,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:32,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:46:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:46:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:33,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910187703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:33,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:33,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-11-18 20:46:33,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704663872] [2022-11-18 20:46:33,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:33,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:46:33,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:33,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:46:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:46:33,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 184 [2022-11-18 20:46:33,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 187 transitions, 627 flow. Second operand has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:33,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:33,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 184 [2022-11-18 20:46:33,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:35,140 INFO L130 PetriNetUnfolder]: 1000/2883 cut-off events. [2022-11-18 20:46:35,140 INFO L131 PetriNetUnfolder]: For 1379/1436 co-relation queries the response was YES. [2022-11-18 20:46:35,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 2883 events. 1000/2883 cut-off events. For 1379/1436 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 23388 event pairs, 690 based on Foata normal form. 23/2631 useless extension candidates. Maximal degree in co-relation 6518. Up to 1174 conditions per place. [2022-11-18 20:46:35,175 INFO L137 encePairwiseOnDemand]: 167/184 looper letters, 50 selfloop transitions, 13 changer transitions 21/208 dead transitions. [2022-11-18 20:46:35,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 208 transitions, 853 flow [2022-11-18 20:46:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:46:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:46:35,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2174 transitions. [2022-11-18 20:46:35,183 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6950127877237852 [2022-11-18 20:46:35,183 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2174 transitions. [2022-11-18 20:46:35,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2174 transitions. [2022-11-18 20:46:35,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:35,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2174 transitions. [2022-11-18 20:46:35,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 127.88235294117646) internal successors, (2174), 17 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:35,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:35,201 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 184.0) internal successors, (3312), 18 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:35,201 INFO L175 Difference]: Start difference. First operand has 217 places, 187 transitions, 627 flow. Second operand 17 states and 2174 transitions. [2022-11-18 20:46:35,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 208 transitions, 853 flow [2022-11-18 20:46:35,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 208 transitions, 827 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-11-18 20:46:35,221 INFO L231 Difference]: Finished difference. Result has 223 places, 177 transitions, 573 flow [2022-11-18 20:46:35,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=573, PETRI_PLACES=223, PETRI_TRANSITIONS=177} [2022-11-18 20:46:35,222 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 58 predicate places. [2022-11-18 20:46:35,222 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 177 transitions, 573 flow [2022-11-18 20:46:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 126.41935483870968) internal successors, (3919), 31 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:35,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:35,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:35,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:46:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:35,431 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:35,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:35,432 INFO L85 PathProgramCache]: Analyzing trace with hash 872581959, now seen corresponding path program 2 times [2022-11-18 20:46:35,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:35,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114889654] [2022-11-18 20:46:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:35,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:35,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114889654] [2022-11-18 20:46:35,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114889654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:35,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303318387] [2022-11-18 20:46:35,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:46:35,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:35,757 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:35,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:46:35,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:46:35,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:35,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:46:35,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:36,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:36,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303318387] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:36,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:36,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-18 20:46:36,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64392158] [2022-11-18 20:46:36,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:36,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:46:36,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:36,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:46:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:46:36,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-18 20:46:36,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 177 transitions, 573 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:36,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:36,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-18 20:46:36,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:38,185 INFO L130 PetriNetUnfolder]: 2643/6400 cut-off events. [2022-11-18 20:46:38,186 INFO L131 PetriNetUnfolder]: For 2904/2917 co-relation queries the response was YES. [2022-11-18 20:46:38,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14736 conditions, 6400 events. 2643/6400 cut-off events. For 2904/2917 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 57853 event pairs, 617 based on Foata normal form. 13/6193 useless extension candidates. Maximal degree in co-relation 14708. Up to 1153 conditions per place. [2022-11-18 20:46:38,260 INFO L137 encePairwiseOnDemand]: 170/184 looper letters, 82 selfloop transitions, 20 changer transitions 0/234 dead transitions. [2022-11-18 20:46:38,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 234 transitions, 960 flow [2022-11-18 20:46:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:46:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 20:46:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1992 transitions. [2022-11-18 20:46:38,266 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7732919254658385 [2022-11-18 20:46:38,266 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1992 transitions. [2022-11-18 20:46:38,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1992 transitions. [2022-11-18 20:46:38,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:38,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1992 transitions. [2022-11-18 20:46:38,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.28571428571428) internal successors, (1992), 14 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) [2022-11-18 20:46:38,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:38,296 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:38,296 INFO L175 Difference]: Start difference. First operand has 223 places, 177 transitions, 573 flow. Second operand 14 states and 1992 transitions. [2022-11-18 20:46:38,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 234 transitions, 960 flow [2022-11-18 20:46:38,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 234 transitions, 886 flow, removed 23 selfloop flow, removed 19 redundant places. [2022-11-18 20:46:38,328 INFO L231 Difference]: Finished difference. Result has 210 places, 189 transitions, 636 flow [2022-11-18 20:46:38,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=636, PETRI_PLACES=210, PETRI_TRANSITIONS=189} [2022-11-18 20:46:38,329 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 45 predicate places. [2022-11-18 20:46:38,329 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 189 transitions, 636 flow [2022-11-18 20:46:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:38,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:38,331 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:38,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:38,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:38,537 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2135314175, now seen corresponding path program 3 times [2022-11-18 20:46:38,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668702800] [2022-11-18 20:46:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:38,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:38,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:38,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668702800] [2022-11-18 20:46:38,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668702800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:38,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600935658] [2022-11-18 20:46:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:46:38,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:38,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:38,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:46:39,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:46:39,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:46:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:46:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:46:39,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600935658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:39,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:39,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-11-18 20:46:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930659149] [2022-11-18 20:46:39,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:39,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:46:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:39,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:46:39,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:46:39,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-18 20:46:39,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 189 transitions, 636 flow. Second operand has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:39,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:39,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-18 20:46:39,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:43,646 INFO L130 PetriNetUnfolder]: 8766/20056 cut-off events. [2022-11-18 20:46:43,646 INFO L131 PetriNetUnfolder]: For 11149/11266 co-relation queries the response was YES. [2022-11-18 20:46:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46484 conditions, 20056 events. 8766/20056 cut-off events. For 11149/11266 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 203712 event pairs, 731 based on Foata normal form. 80/19763 useless extension candidates. Maximal degree in co-relation 46461. Up to 1539 conditions per place. [2022-11-18 20:46:43,800 INFO L137 encePairwiseOnDemand]: 165/184 looper letters, 265 selfloop transitions, 92 changer transitions 0/484 dead transitions. [2022-11-18 20:46:43,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 484 transitions, 2300 flow [2022-11-18 20:46:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:46:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:46:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3847 transitions. [2022-11-18 20:46:43,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7743558776167472 [2022-11-18 20:46:43,811 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3847 transitions. [2022-11-18 20:46:43,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3847 transitions. [2022-11-18 20:46:43,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:43,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3847 transitions. [2022-11-18 20:46:43,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 142.4814814814815) internal successors, (3847), 27 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:43,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:43,836 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 184.0) internal successors, (5152), 28 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:43,836 INFO L175 Difference]: Start difference. First operand has 210 places, 189 transitions, 636 flow. Second operand 27 states and 3847 transitions. [2022-11-18 20:46:43,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 484 transitions, 2300 flow [2022-11-18 20:46:44,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 484 transitions, 2287 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-18 20:46:44,048 INFO L231 Difference]: Finished difference. Result has 248 places, 270 transitions, 1403 flow [2022-11-18 20:46:44,049 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=623, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1403, PETRI_PLACES=248, PETRI_TRANSITIONS=270} [2022-11-18 20:46:44,050 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 83 predicate places. [2022-11-18 20:46:44,050 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 270 transitions, 1403 flow [2022-11-18 20:46:44,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 133.77777777777777) internal successors, (2408), 18 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:44,051 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:44,051 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:44,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:44,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:44,262 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:44,263 INFO L85 PathProgramCache]: Analyzing trace with hash 444928427, now seen corresponding path program 4 times [2022-11-18 20:46:44,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:44,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936420324] [2022-11-18 20:46:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:44,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:44,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:44,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:44,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936420324] [2022-11-18 20:46:44,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936420324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:44,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026976155] [2022-11-18 20:46:44,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:46:44,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:44,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:44,519 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:44,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:46:44,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:46:44,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:46:44,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:44,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:45,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026976155] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:45,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:45,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 23 [2022-11-18 20:46:45,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532435641] [2022-11-18 20:46:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:45,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:46:45,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:46:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:46:45,156 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-18 20:46:45,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 270 transitions, 1403 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:45,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:45,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-18 20:46:45,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:47,979 INFO L130 PetriNetUnfolder]: 4783/12514 cut-off events. [2022-11-18 20:46:47,980 INFO L131 PetriNetUnfolder]: For 36741/37742 co-relation queries the response was YES. [2022-11-18 20:46:48,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 12514 events. 4783/12514 cut-off events. For 36741/37742 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 125771 event pairs, 826 based on Foata normal form. 83/12284 useless extension candidates. Maximal degree in co-relation 37604. Up to 2974 conditions per place. [2022-11-18 20:46:48,099 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 110 selfloop transitions, 94 changer transitions 0/353 dead transitions. [2022-11-18 20:46:48,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 353 transitions, 2460 flow [2022-11-18 20:46:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:46:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-18 20:46:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1982 transitions. [2022-11-18 20:46:48,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7694099378881988 [2022-11-18 20:46:48,104 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1982 transitions. [2022-11-18 20:46:48,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1982 transitions. [2022-11-18 20:46:48,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:48,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1982 transitions. [2022-11-18 20:46:48,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 141.57142857142858) internal successors, (1982), 14 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:48,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:48,118 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 184.0) internal successors, (2760), 15 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:48,118 INFO L175 Difference]: Start difference. First operand has 248 places, 270 transitions, 1403 flow. Second operand 14 states and 1982 transitions. [2022-11-18 20:46:48,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 353 transitions, 2460 flow [2022-11-18 20:46:48,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 353 transitions, 2411 flow, removed 16 selfloop flow, removed 9 redundant places. [2022-11-18 20:46:48,342 INFO L231 Difference]: Finished difference. Result has 258 places, 305 transitions, 2045 flow [2022-11-18 20:46:48,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2045, PETRI_PLACES=258, PETRI_TRANSITIONS=305} [2022-11-18 20:46:48,345 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 93 predicate places. [2022-11-18 20:46:48,345 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 305 transitions, 2045 flow [2022-11-18 20:46:48,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:48,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:48,346 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:48,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:48,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:48,552 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1830030583, now seen corresponding path program 5 times [2022-11-18 20:46:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:48,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167800781] [2022-11-18 20:46:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:46:48,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167800781] [2022-11-18 20:46:48,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167800781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:48,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578091560] [2022-11-18 20:46:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:48,818 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:48,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:46:48,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:46:48,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:48,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:46:48,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:46:49,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:46:49,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578091560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:49,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:49,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-18 20:46:49,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350627292] [2022-11-18 20:46:49,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:49,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:46:49,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:46:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:46:49,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 184 [2022-11-18 20:46:49,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 305 transitions, 2045 flow. Second operand has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:49,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:49,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 184 [2022-11-18 20:46:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:46:55,049 INFO L130 PetriNetUnfolder]: 10040/23203 cut-off events. [2022-11-18 20:46:55,049 INFO L131 PetriNetUnfolder]: For 88979/89185 co-relation queries the response was YES. [2022-11-18 20:46:55,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75614 conditions, 23203 events. 10040/23203 cut-off events. For 88979/89185 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 241979 event pairs, 901 based on Foata normal form. 154/22960 useless extension candidates. Maximal degree in co-relation 75569. Up to 2099 conditions per place. [2022-11-18 20:46:55,299 INFO L137 encePairwiseOnDemand]: 164/184 looper letters, 282 selfloop transitions, 185 changer transitions 0/594 dead transitions. [2022-11-18 20:46:55,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 594 transitions, 4695 flow [2022-11-18 20:46:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-18 20:46:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-18 20:46:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4129 transitions. [2022-11-18 20:46:55,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738005997001499 [2022-11-18 20:46:55,315 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4129 transitions. [2022-11-18 20:46:55,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4129 transitions. [2022-11-18 20:46:55,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:46:55,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4129 transitions. [2022-11-18 20:46:55,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 142.3793103448276) internal successors, (4129), 29 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:55,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:55,335 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 184.0) internal successors, (5520), 30 states have internal predecessors, (5520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:55,335 INFO L175 Difference]: Start difference. First operand has 258 places, 305 transitions, 2045 flow. Second operand 29 states and 4129 transitions. [2022-11-18 20:46:55,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 594 transitions, 4695 flow [2022-11-18 20:46:56,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 594 transitions, 4658 flow, removed 12 selfloop flow, removed 7 redundant places. [2022-11-18 20:46:56,271 INFO L231 Difference]: Finished difference. Result has 291 places, 370 transitions, 3204 flow [2022-11-18 20:46:56,271 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3204, PETRI_PLACES=291, PETRI_TRANSITIONS=370} [2022-11-18 20:46:56,272 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 126 predicate places. [2022-11-18 20:46:56,272 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 370 transitions, 3204 flow [2022-11-18 20:46:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 133.88235294117646) internal successors, (2276), 17 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:56,273 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:46:56,273 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:56,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:56,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:46:56,479 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:46:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1358269369, now seen corresponding path program 6 times [2022-11-18 20:46:56,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:56,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727563427] [2022-11-18 20:46:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727563427] [2022-11-18 20:46:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727563427] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:56,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575940997] [2022-11-18 20:46:56,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:46:56,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:56,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:56,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:56,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:46:57,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:46:57,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:46:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:57,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:57,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575940997] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:57,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:57,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 24 [2022-11-18 20:46:57,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910900951] [2022-11-18 20:46:57,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:57,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:46:57,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:57,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:46:57,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:46:57,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-18 20:46:57,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 370 transitions, 3204 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:46:57,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:46:57,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-18 20:46:57,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:47:00,875 INFO L130 PetriNetUnfolder]: 5605/14248 cut-off events. [2022-11-18 20:47:00,875 INFO L131 PetriNetUnfolder]: For 75084/76650 co-relation queries the response was YES. [2022-11-18 20:47:00,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51970 conditions, 14248 events. 5605/14248 cut-off events. For 75084/76650 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 145095 event pairs, 909 based on Foata normal form. 185/14021 useless extension candidates. Maximal degree in co-relation 51913. Up to 4853 conditions per place. [2022-11-18 20:47:01,008 INFO L137 encePairwiseOnDemand]: 168/184 looper letters, 145 selfloop transitions, 113 changer transitions 0/425 dead transitions. [2022-11-18 20:47:01,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 4220 flow [2022-11-18 20:47:01,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:47:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:47:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1851 transitions. [2022-11-18 20:47:01,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7738294314381271 [2022-11-18 20:47:01,012 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1851 transitions. [2022-11-18 20:47:01,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1851 transitions. [2022-11-18 20:47:01,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:47:01,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1851 transitions. [2022-11-18 20:47:01,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.3846153846154) internal successors, (1851), 13 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:01,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:01,020 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:01,021 INFO L175 Difference]: Start difference. First operand has 291 places, 370 transitions, 3204 flow. Second operand 13 states and 1851 transitions. [2022-11-18 20:47:01,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 4220 flow [2022-11-18 20:47:01,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 425 transitions, 4098 flow, removed 20 selfloop flow, removed 10 redundant places. [2022-11-18 20:47:01,465 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 3636 flow [2022-11-18 20:47:01,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3098, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3636, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2022-11-18 20:47:01,467 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 131 predicate places. [2022-11-18 20:47:01,467 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 3636 flow [2022-11-18 20:47:01,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:01,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:47:01,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:01,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:01,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:01,674 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:47:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash 231440623, now seen corresponding path program 7 times [2022-11-18 20:47:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259590642] [2022-11-18 20:47:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:01,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:01,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259590642] [2022-11-18 20:47:01,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259590642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317145455] [2022-11-18 20:47:01,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:47:01,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:01,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:01,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:01,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:47:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:47:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:02,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:02,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317145455] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:02,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:47:02,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11, 11] total 25 [2022-11-18 20:47:02,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322558766] [2022-11-18 20:47:02,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:47:02,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:47:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:47:02,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 184 [2022-11-18 20:47:02,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 3636 flow. Second operand has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:02,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:47:02,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 184 [2022-11-18 20:47:02,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:47:06,135 INFO L130 PetriNetUnfolder]: 5528/14207 cut-off events. [2022-11-18 20:47:06,135 INFO L131 PetriNetUnfolder]: For 82683/84654 co-relation queries the response was YES. [2022-11-18 20:47:06,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52813 conditions, 14207 events. 5528/14207 cut-off events. For 82683/84654 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 144649 event pairs, 631 based on Foata normal form. 165/13982 useless extension candidates. Maximal degree in co-relation 52753. Up to 3822 conditions per place. [2022-11-18 20:47:06,556 INFO L137 encePairwiseOnDemand]: 169/184 looper letters, 122 selfloop transitions, 131 changer transitions 0/420 dead transitions. [2022-11-18 20:47:06,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 420 transitions, 4463 flow [2022-11-18 20:47:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:47:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:47:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1846 transitions. [2022-11-18 20:47:06,559 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7717391304347826 [2022-11-18 20:47:06,559 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1846 transitions. [2022-11-18 20:47:06,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1846 transitions. [2022-11-18 20:47:06,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:47:06,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1846 transitions. [2022-11-18 20:47:06,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:06,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:06,579 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 184.0) internal successors, (2576), 14 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:06,579 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 3636 flow. Second operand 13 states and 1846 transitions. [2022-11-18 20:47:06,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 420 transitions, 4463 flow [2022-11-18 20:47:07,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 4333 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-18 20:47:07,084 INFO L231 Difference]: Finished difference. Result has 302 places, 384 transitions, 4000 flow [2022-11-18 20:47:07,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3508, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4000, PETRI_PLACES=302, PETRI_TRANSITIONS=384} [2022-11-18 20:47:07,085 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 137 predicate places. [2022-11-18 20:47:07,085 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 384 transitions, 4000 flow [2022-11-18 20:47:07,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 138.1818181818182) internal successors, (1520), 11 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:07,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:47:07,086 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:07,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:07,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:47:07,286 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:47:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1713378892, now seen corresponding path program 2 times [2022-11-18 20:47:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:07,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469683477] [2022-11-18 20:47:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:07,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:07,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469683477] [2022-11-18 20:47:07,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469683477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217919506] [2022-11-18 20:47:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:47:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:07,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:07,508 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:07,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:47:07,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:47:07,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:07,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:47:07,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:07,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:47:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217919506] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:08,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:47:08,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 19 [2022-11-18 20:47:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623800666] [2022-11-18 20:47:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:47:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:47:08,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:47:08,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 184 [2022-11-18 20:47:08,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 384 transitions, 4000 flow. Second operand has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:08,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:47:08,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 184 [2022-11-18 20:47:08,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:47:09,280 INFO L130 PetriNetUnfolder]: 1391/5136 cut-off events. [2022-11-18 20:47:09,281 INFO L131 PetriNetUnfolder]: For 42985/45261 co-relation queries the response was YES. [2022-11-18 20:47:09,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18665 conditions, 5136 events. 1391/5136 cut-off events. For 42985/45261 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 49128 event pairs, 228 based on Foata normal form. 299/5105 useless extension candidates. Maximal degree in co-relation 18603. Up to 841 conditions per place. [2022-11-18 20:47:09,354 INFO L137 encePairwiseOnDemand]: 173/184 looper letters, 136 selfloop transitions, 45 changer transitions 0/432 dead transitions. [2022-11-18 20:47:09,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 432 transitions, 5078 flow [2022-11-18 20:47:09,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:47:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 20:47:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1483 transitions. [2022-11-18 20:47:09,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8059782608695653 [2022-11-18 20:47:09,357 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1483 transitions. [2022-11-18 20:47:09,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1483 transitions. [2022-11-18 20:47:09,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:47:09,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1483 transitions. [2022-11-18 20:47:09,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 148.3) internal successors, (1483), 10 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:09,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:09,363 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 184.0) internal successors, (2024), 11 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:09,364 INFO L175 Difference]: Start difference. First operand has 302 places, 384 transitions, 4000 flow. Second operand 10 states and 1483 transitions. [2022-11-18 20:47:09,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 432 transitions, 5078 flow [2022-11-18 20:47:09,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 432 transitions, 4845 flow, removed 37 selfloop flow, removed 13 redundant places. [2022-11-18 20:47:09,523 INFO L231 Difference]: Finished difference. Result has 299 places, 384 transitions, 3926 flow [2022-11-18 20:47:09,523 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3926, PETRI_PLACES=299, PETRI_TRANSITIONS=384} [2022-11-18 20:47:09,524 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 134 predicate places. [2022-11-18 20:47:09,524 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 384 transitions, 3926 flow [2022-11-18 20:47:09,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 147.44444444444446) internal successors, (1327), 9 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:09,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:47:09,524 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:09,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:09,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:47:09,725 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:47:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:09,725 INFO L85 PathProgramCache]: Analyzing trace with hash 2095026434, now seen corresponding path program 1 times [2022-11-18 20:47:09,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:09,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192191633] [2022-11-18 20:47:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:09,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:47:09,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192191633] [2022-11-18 20:47:09,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192191633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:47:09,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:47:09,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:47:09,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797790995] [2022-11-18 20:47:09,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:47:09,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:47:09,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:47:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:47:09,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 184 [2022-11-18 20:47:09,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 384 transitions, 3926 flow. Second operand has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:09,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:47:09,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 184 [2022-11-18 20:47:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:47:10,746 INFO L130 PetriNetUnfolder]: 1033/4612 cut-off events. [2022-11-18 20:47:10,746 INFO L131 PetriNetUnfolder]: For 25449/26173 co-relation queries the response was YES. [2022-11-18 20:47:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15557 conditions, 4612 events. 1033/4612 cut-off events. For 25449/26173 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 44298 event pairs, 49 based on Foata normal form. 124/4638 useless extension candidates. Maximal degree in co-relation 15498. Up to 308 conditions per place. [2022-11-18 20:47:10,803 INFO L137 encePairwiseOnDemand]: 178/184 looper letters, 31 selfloop transitions, 8 changer transitions 0/401 dead transitions. [2022-11-18 20:47:10,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 401 transitions, 4120 flow [2022-11-18 20:47:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:47:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:47:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 826 transitions. [2022-11-18 20:47:10,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8978260869565218 [2022-11-18 20:47:10,806 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 826 transitions. [2022-11-18 20:47:10,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 826 transitions. [2022-11-18 20:47:10,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:47:10,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 826 transitions. [2022-11-18 20:47:10,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.2) internal successors, (826), 5 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:10,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:10,809 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 184.0) internal successors, (1104), 6 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:10,811 INFO L175 Difference]: Start difference. First operand has 299 places, 384 transitions, 3926 flow. Second operand 5 states and 826 transitions. [2022-11-18 20:47:10,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 401 transitions, 4120 flow [2022-11-18 20:47:10,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 401 transitions, 4067 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-11-18 20:47:10,981 INFO L231 Difference]: Finished difference. Result has 298 places, 387 transitions, 3915 flow [2022-11-18 20:47:10,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=184, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3915, PETRI_PLACES=298, PETRI_TRANSITIONS=387} [2022-11-18 20:47:10,982 INFO L288 CegarLoopForPetriNet]: 165 programPoint places, 133 predicate places. [2022-11-18 20:47:10,982 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 387 transitions, 3915 flow [2022-11-18 20:47:10,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 163.25) internal successors, (653), 4 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:10,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:47:10,983 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:47:10,984 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:47:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1171554897, now seen corresponding path program 1 times [2022-11-18 20:47:10,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:10,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922508406] [2022-11-18 20:47:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:10,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:47:15,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:15,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922508406] [2022-11-18 20:47:15,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922508406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:15,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767160839] [2022-11-18 20:47:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:15,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:15,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:15,449 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:15,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18016a3c-e7f1-4472-bf2f-1e568e3333fb/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:47:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:47:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:18,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:47:18,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:18,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2022-11-18 20:47:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:19,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:23,375 INFO L321 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2022-11-18 20:47:23,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 43 [2022-11-18 20:47:23,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:23,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 81 [2022-11-18 20:47:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:25,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767160839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:25,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:25,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 35, 31] total 84 [2022-11-18 20:47:25,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543758836] [2022-11-18 20:47:25,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:25,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-18 20:47:25,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-18 20:47:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=6374, Unknown=0, NotChecked=0, Total=6972 [2022-11-18 20:47:25,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 184 [2022-11-18 20:47:25,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 387 transitions, 3915 flow. Second operand has 84 states, 84 states have (on average 73.98809523809524) internal successors, (6215), 84 states have internal predecessors, (6215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:47:25,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:47:25,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 184 [2022-11-18 20:47:25,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand