./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS --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 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 --- 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-4e7fbc6 [2022-11-23 03:21:05,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:21:05,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:21:05,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:21:05,278 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:21:05,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:21:05,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:21:05,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:21:05,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:21:05,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:21:05,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:21:05,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:21:05,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:21:05,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:21:05,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:21:05,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:21:05,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:21:05,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:21:05,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:21:05,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:21:05,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:21:05,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:21:05,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:21:05,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:21:05,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:21:05,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:21:05,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:21:05,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:21:05,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:21:05,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:21:05,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:21:05,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:21:05,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:21:05,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:21:05,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:21:05,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:21:05,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:21:05,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:21:05,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:21:05,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:21:05,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:21:05,347 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:21:05,382 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:21:05,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:21:05,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:21:05,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:21:05,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:21:05,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:21:05,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:21:05,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:21:05,385 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:21:05,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:21:05,387 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:21:05,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:21:05,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:21:05,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:21:05,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:21:05,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:21:05,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:21:05,388 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:21:05,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:21:05,389 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:21:05,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:21:05,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:21:05,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:21:05,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:21:05,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:21:05,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:21:05,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:21:05,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:21:05,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:21:05,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:21:05,392 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:21:05,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:21:05,392 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:21:05,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:21:05,393 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33cf58268090640beca4b79cf718f2ee2d6c29dee3e4b3e200f8bf0a7c295123 [2022-11-23 03:21:05,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:21:05,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:21:05,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:21:05,709 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:21:05,709 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:21:05,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-23 03:21:08,751 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:21:09,003 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:21:09,004 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2022-11-23 03:21:09,010 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/data/02cdcaf30/a753bceb70e5474b9f14764790937c8a/FLAG0a16f22f1 [2022-11-23 03:21:09,024 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/data/02cdcaf30/a753bceb70e5474b9f14764790937c8a [2022-11-23 03:21:09,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:21:09,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:21:09,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:21:09,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:21:09,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:21:09,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40833276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09, skipping insertion in model container [2022-11-23 03:21:09,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:21:09,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:21:09,219 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-23 03:21:09,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:21:09,237 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:21:09,256 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1991,2004] [2022-11-23 03:21:09,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:21:09,271 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:21:09,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09 WrapperNode [2022-11-23 03:21:09,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:21:09,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:21:09,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:21:09,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:21:09,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,303 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-11-23 03:21:09,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:21:09,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:21:09,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:21:09,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:21:09,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:21:09,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:21:09,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:21:09,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:21:09,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (1/1) ... [2022-11-23 03:21:09,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:21:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:09,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:21:09,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:21:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:21:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:21:09,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:21:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:21:09,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:21:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:21:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:21:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:21:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:21:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:21:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:21:09,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:21:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:21:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:21:09,422 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:21:09,522 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:21:09,524 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:21:09,714 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:21:09,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:21:09,791 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:21:09,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:09 BoogieIcfgContainer [2022-11-23 03:21:09,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:21:09,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:21:09,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:21:09,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:21:09,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:21:09" (1/3) ... [2022-11-23 03:21:09,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@905a503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:09, skipping insertion in model container [2022-11-23 03:21:09,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:21:09" (2/3) ... [2022-11-23 03:21:09,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@905a503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:21:09, skipping insertion in model container [2022-11-23 03:21:09,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:21:09" (3/3) ... [2022-11-23 03:21:09,828 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2022-11-23 03:21:09,839 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:21:09,850 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:21:09,850 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:21:09,860 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:21:09,966 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:21:10,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 170 flow [2022-11-23 03:21:10,072 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2022-11-23 03:21:10,072 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:21:10,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 75 events. 5/75 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-11-23 03:21:10,077 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 77 transitions, 170 flow [2022-11-23 03:21:10,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 66 transitions, 144 flow [2022-11-23 03:21:10,086 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:21:10,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 144 flow [2022-11-23 03:21:10,105 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 144 flow [2022-11-23 03:21:10,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 144 flow [2022-11-23 03:21:10,128 INFO L130 PetriNetUnfolder]: 5/66 cut-off events. [2022-11-23 03:21:10,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:21:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 5/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2022-11-23 03:21:10,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2022-11-23 03:21:12,458 INFO L134 LiptonReduction]: Checked pairs total: 493 [2022-11-23 03:21:12,459 INFO L136 LiptonReduction]: Total number of compositions: 58 [2022-11-23 03:21:12,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:21:12,481 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4aa8d50d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:21:12,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:21:12,487 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-23 03:21:12,487 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:21:12,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:12,488 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:12,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:12,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:12,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1727107029, now seen corresponding path program 1 times [2022-11-23 03:21:12,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:12,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367130249] [2022-11-23 03:21:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:12,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:12,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367130249] [2022-11-23 03:21:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367130249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:21:12,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:21:12,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:21:12,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567359378] [2022-11-23 03:21:12,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:21:12,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:21:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:12,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:21:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:21:12,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 135 [2022-11-23 03:21:12,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:12,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:12,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 135 [2022-11-23 03:21:12,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:13,064 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2022-11-23 03:21:13,064 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-23 03:21:13,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 259 event pairs, 13 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2022-11-23 03:21:13,067 INFO L137 encePairwiseOnDemand]: 131/135 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2022-11-23 03:21:13,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2022-11-23 03:21:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:21:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:21:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-23 03:21:13,081 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2022-11-23 03:21:13,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-23 03:21:13,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-23 03:21:13,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:13,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-23 03:21:13,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,097 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 222 transitions. [2022-11-23 03:21:13,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2022-11-23 03:21:13,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:21:13,102 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2022-11-23 03:21:13,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2022-11-23 03:21:13,108 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-11-23 03:21:13,108 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2022-11-23 03:21:13,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:13,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:13,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:21:13,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:13,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:13,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1385748593, now seen corresponding path program 1 times [2022-11-23 03:21:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:13,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835840083] [2022-11-23 03:21:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:13,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:13,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835840083] [2022-11-23 03:21:13,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835840083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:21:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:21:13,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:21:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169151959] [2022-11-23 03:21:13,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:21:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:21:13,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:21:13,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:21:13,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 135 [2022-11-23 03:21:13,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:13,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 135 [2022-11-23 03:21:13,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:13,366 INFO L130 PetriNetUnfolder]: 76/153 cut-off events. [2022-11-23 03:21:13,366 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-23 03:21:13,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 153 events. 76/153 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 480 event pairs, 24 based on Foata normal form. 2/155 useless extension candidates. Maximal degree in co-relation 172. Up to 78 conditions per place. [2022-11-23 03:21:13,368 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 30 selfloop transitions, 3 changer transitions 6/39 dead transitions. [2022-11-23 03:21:13,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 39 transitions, 191 flow [2022-11-23 03:21:13,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:21:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:21:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 332 transitions. [2022-11-23 03:21:13,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4918518518518519 [2022-11-23 03:21:13,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 332 transitions. [2022-11-23 03:21:13,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 332 transitions. [2022-11-23 03:21:13,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:13,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 332 transitions. [2022-11-23 03:21:13,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.4) internal successors, (332), 5 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,378 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 332 transitions. [2022-11-23 03:21:13,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 39 transitions, 191 flow [2022-11-23 03:21:13,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 39 transitions, 187 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:21:13,380 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 70 flow [2022-11-23 03:21:13,381 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-11-23 03:21:13,381 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-23 03:21:13,382 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 70 flow [2022-11-23 03:21:13,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:13,383 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:13,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:21:13,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1024086511, now seen corresponding path program 2 times [2022-11-23 03:21:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:13,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560716088] [2022-11-23 03:21:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:13,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560716088] [2022-11-23 03:21:13,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560716088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:13,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750810635] [2022-11-23 03:21:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:13,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:13,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:21:13,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:13,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:21:13,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:13,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:13,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750810635] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:13,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:13,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-23 03:21:13,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052785497] [2022-11-23 03:21:13,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:13,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:21:13,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:13,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:21:13,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:21:13,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:13,896 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 70 flow. Second operand has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:13,896 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:13,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:13,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:14,079 INFO L130 PetriNetUnfolder]: 82/158 cut-off events. [2022-11-23 03:21:14,080 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-11-23 03:21:14,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 158 events. 82/158 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 483 event pairs, 14 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 143. Up to 90 conditions per place. [2022-11-23 03:21:14,082 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 29 selfloop transitions, 4 changer transitions 5/38 dead transitions. [2022-11-23 03:21:14,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 212 flow [2022-11-23 03:21:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:21:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:21:14,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 322 transitions. [2022-11-23 03:21:14,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47703703703703704 [2022-11-23 03:21:14,086 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 322 transitions. [2022-11-23 03:21:14,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 322 transitions. [2022-11-23 03:21:14,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:14,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 322 transitions. [2022-11-23 03:21:14,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,092 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,092 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 70 flow. Second operand 5 states and 322 transitions. [2022-11-23 03:21:14,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 212 flow [2022-11-23 03:21:14,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 201 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 03:21:14,095 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 91 flow [2022-11-23 03:21:14,096 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-11-23 03:21:14,097 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2022-11-23 03:21:14,097 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 91 flow [2022-11-23 03:21:14,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 59.625) internal successors, (477), 8 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:14,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:14,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:14,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:14,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash -888549371, now seen corresponding path program 3 times [2022-11-23 03:21:14,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176913640] [2022-11-23 03:21:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:14,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:14,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176913640] [2022-11-23 03:21:14,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176913640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:21:14,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:21:14,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:21:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034386104] [2022-11-23 03:21:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:21:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:21:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:21:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:21:14,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 135 [2022-11-23 03:21:14,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:14,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 135 [2022-11-23 03:21:14,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:14,609 INFO L130 PetriNetUnfolder]: 90/179 cut-off events. [2022-11-23 03:21:14,609 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-11-23 03:21:14,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 179 events. 90/179 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 565 event pairs, 32 based on Foata normal form. 2/181 useless extension candidates. Maximal degree in co-relation 327. Up to 84 conditions per place. [2022-11-23 03:21:14,614 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 25 selfloop transitions, 6 changer transitions 8/39 dead transitions. [2022-11-23 03:21:14,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 241 flow [2022-11-23 03:21:14,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:21:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:21:14,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 326 transitions. [2022-11-23 03:21:14,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.482962962962963 [2022-11-23 03:21:14,617 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 326 transitions. [2022-11-23 03:21:14,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 326 transitions. [2022-11-23 03:21:14,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:14,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 326 transitions. [2022-11-23 03:21:14,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 65.2) internal successors, (326), 5 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,623 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 91 flow. Second operand 5 states and 326 transitions. [2022-11-23 03:21:14,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 241 flow [2022-11-23 03:21:14,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:21:14,629 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 129 flow [2022-11-23 03:21:14,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=129, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2022-11-23 03:21:14,631 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2022-11-23 03:21:14,631 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 129 flow [2022-11-23 03:21:14,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,632 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:14,632 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:14,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:21:14,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:14,636 INFO L85 PathProgramCache]: Analyzing trace with hash 744049693, now seen corresponding path program 4 times [2022-11-23 03:21:14,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:14,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407647001] [2022-11-23 03:21:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:14,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407647001] [2022-11-23 03:21:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407647001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:21:14,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:21:14,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:21:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4249843] [2022-11-23 03:21:14,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:21:14,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:21:14,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:14,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:21:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:21:14,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 135 [2022-11-23 03:21:14,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:14,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 135 [2022-11-23 03:21:14,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:14,882 INFO L130 PetriNetUnfolder]: 81/159 cut-off events. [2022-11-23 03:21:14,883 INFO L131 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2022-11-23 03:21:14,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 159 events. 81/159 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 478 event pairs, 34 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 242. Up to 116 conditions per place. [2022-11-23 03:21:14,887 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 22 selfloop transitions, 6 changer transitions 15/43 dead transitions. [2022-11-23 03:21:14,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 306 flow [2022-11-23 03:21:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:21:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:21:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 386 transitions. [2022-11-23 03:21:14,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4765432098765432 [2022-11-23 03:21:14,889 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 386 transitions. [2022-11-23 03:21:14,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 386 transitions. [2022-11-23 03:21:14,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:14,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 386 transitions. [2022-11-23 03:21:14,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,894 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,894 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 129 flow. Second operand 6 states and 386 transitions. [2022-11-23 03:21:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 306 flow [2022-11-23 03:21:14,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 292 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 03:21:14,900 INFO L231 Difference]: Finished difference. Result has 38 places, 24 transitions, 164 flow [2022-11-23 03:21:14,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=38, PETRI_TRANSITIONS=24} [2022-11-23 03:21:14,903 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-11-23 03:21:14,903 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 24 transitions, 164 flow [2022-11-23 03:21:14,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:14,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:14,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:14,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 03:21:14,905 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:14,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:14,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1609050427, now seen corresponding path program 5 times [2022-11-23 03:21:14,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188255606] [2022-11-23 03:21:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:14,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:15,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188255606] [2022-11-23 03:21:15,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188255606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:15,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477389614] [2022-11-23 03:21:15,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:21:15,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:15,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:15,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:15,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:21:15,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:15,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:21:15,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477389614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:15,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:15,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:21:15,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493573242] [2022-11-23 03:21:15,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:15,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:21:15,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:15,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:21:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:21:15,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:15,264 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 24 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:15,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:15,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:15,440 INFO L130 PetriNetUnfolder]: 83/156 cut-off events. [2022-11-23 03:21:15,440 INFO L131 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2022-11-23 03:21:15,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 652 conditions, 156 events. 83/156 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 427 event pairs, 14 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 468. Up to 100 conditions per place. [2022-11-23 03:21:15,442 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 37 selfloop transitions, 11 changer transitions 1/49 dead transitions. [2022-11-23 03:21:15,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 365 flow [2022-11-23 03:21:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:21:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:21:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 502 transitions. [2022-11-23 03:21:15,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4648148148148148 [2022-11-23 03:21:15,445 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 502 transitions. [2022-11-23 03:21:15,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 502 transitions. [2022-11-23 03:21:15,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:15,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 502 transitions. [2022-11-23 03:21:15,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.75) internal successors, (502), 8 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,450 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,450 INFO L175 Difference]: Start difference. First operand has 38 places, 24 transitions, 164 flow. Second operand 8 states and 502 transitions. [2022-11-23 03:21:15,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 365 flow [2022-11-23 03:21:15,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 49 transitions, 343 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-23 03:21:15,453 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 197 flow [2022-11-23 03:21:15,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2022-11-23 03:21:15,454 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 22 predicate places. [2022-11-23 03:21:15,455 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 197 flow [2022-11-23 03:21:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,455 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:15,455 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:15,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:15,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1256249031, now seen corresponding path program 6 times [2022-11-23 03:21:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148429195] [2022-11-23 03:21:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:15,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148429195] [2022-11-23 03:21:15,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148429195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:15,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915359605] [2022-11-23 03:21:15,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:21:15,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:15,730 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:15,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:21:15,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 03:21:15,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:15,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:21:15,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:15,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915359605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:15,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:15,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-23 03:21:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418372670] [2022-11-23 03:21:15,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:15,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:21:15,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:21:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:21:15,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:15,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 59.4) internal successors, (594), 10 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:15,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:15,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:15,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:16,043 INFO L130 PetriNetUnfolder]: 75/140 cut-off events. [2022-11-23 03:21:16,044 INFO L131 PetriNetUnfolder]: For 569/569 co-relation queries the response was YES. [2022-11-23 03:21:16,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 140 events. 75/140 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 364 event pairs, 21 based on Foata normal form. 6/146 useless extension candidates. Maximal degree in co-relation 509. Up to 87 conditions per place. [2022-11-23 03:21:16,045 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 28 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2022-11-23 03:21:16,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 317 flow [2022-11-23 03:21:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:21:16,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:21:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 317 transitions. [2022-11-23 03:21:16,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4696296296296296 [2022-11-23 03:21:16,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 317 transitions. [2022-11-23 03:21:16,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 317 transitions. [2022-11-23 03:21:16,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:16,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 317 transitions. [2022-11-23 03:21:16,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.4) internal successors, (317), 5 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,050 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,050 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 197 flow. Second operand 5 states and 317 transitions. [2022-11-23 03:21:16,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 317 flow [2022-11-23 03:21:16,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 293 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-23 03:21:16,053 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 177 flow [2022-11-23 03:21:16,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2022-11-23 03:21:16,054 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2022-11-23 03:21:16,054 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 177 flow [2022-11-23 03:21:16,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.4) internal successors, (594), 10 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:16,055 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:16,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:16,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash 120659184, now seen corresponding path program 1 times [2022-11-23 03:21:16,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:16,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889848394] [2022-11-23 03:21:16,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:16,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:16,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:16,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889848394] [2022-11-23 03:21:16,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889848394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721219960] [2022-11-23 03:21:16,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:16,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:16,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:16,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:16,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:21:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:21:16,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:16,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:16,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:16,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721219960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:16,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:16,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-11-23 03:21:16,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993715518] [2022-11-23 03:21:16,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:16,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:21:16,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:16,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:21:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:21:16,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 135 [2022-11-23 03:21:16,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 26 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:16,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 135 [2022-11-23 03:21:16,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:16,698 INFO L130 PetriNetUnfolder]: 118/222 cut-off events. [2022-11-23 03:21:16,699 INFO L131 PetriNetUnfolder]: For 672/689 co-relation queries the response was YES. [2022-11-23 03:21:16,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 222 events. 118/222 cut-off events. For 672/689 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 757 event pairs, 12 based on Foata normal form. 18/234 useless extension candidates. Maximal degree in co-relation 759. Up to 111 conditions per place. [2022-11-23 03:21:16,701 INFO L137 encePairwiseOnDemand]: 131/135 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2022-11-23 03:21:16,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 380 flow [2022-11-23 03:21:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:21:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 03:21:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-11-23 03:21:16,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5537037037037037 [2022-11-23 03:21:16,703 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-11-23 03:21:16,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-11-23 03:21:16,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:16,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-11-23 03:21:16,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,706 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,706 INFO L175 Difference]: Start difference. First operand has 41 places, 26 transitions, 177 flow. Second operand 4 states and 299 transitions. [2022-11-23 03:21:16,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 380 flow [2022-11-23 03:21:16,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 323 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-11-23 03:21:16,710 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 238 flow [2022-11-23 03:21:16,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-11-23 03:21:16,712 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2022-11-23 03:21:16,712 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 238 flow [2022-11-23 03:21:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:16,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:16,713 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:16,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 03:21:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 03:21:16,919 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1787851512, now seen corresponding path program 2 times [2022-11-23 03:21:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:16,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211483288] [2022-11-23 03:21:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:16,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211483288] [2022-11-23 03:21:17,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211483288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650014061] [2022-11-23 03:21:17,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:17,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:17,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:17,016 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:17,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:21:17,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:17,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:17,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650014061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:17,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:17,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-23 03:21:17,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36379482] [2022-11-23 03:21:17,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:17,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:21:17,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:21:17,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:21:17,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:17,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 238 flow. Second operand has 11 states, 11 states have (on average 59.27272727272727) internal successors, (652), 11 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:17,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:17,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:17,422 INFO L130 PetriNetUnfolder]: 162/305 cut-off events. [2022-11-23 03:21:17,422 INFO L131 PetriNetUnfolder]: For 632/632 co-relation queries the response was YES. [2022-11-23 03:21:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1249 conditions, 305 events. 162/305 cut-off events. For 632/632 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1128 event pairs, 29 based on Foata normal form. 6/311 useless extension candidates. Maximal degree in co-relation 506. Up to 161 conditions per place. [2022-11-23 03:21:17,425 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 46 selfloop transitions, 12 changer transitions 4/62 dead transitions. [2022-11-23 03:21:17,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 62 transitions, 489 flow [2022-11-23 03:21:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:21:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:21:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 447 transitions. [2022-11-23 03:21:17,427 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2022-11-23 03:21:17,427 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 447 transitions. [2022-11-23 03:21:17,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 447 transitions. [2022-11-23 03:21:17,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:17,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 447 transitions. [2022-11-23 03:21:17,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.857142857142854) internal successors, (447), 7 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,431 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,431 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 238 flow. Second operand 7 states and 447 transitions. [2022-11-23 03:21:17,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 62 transitions, 489 flow [2022-11-23 03:21:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 475 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-23 03:21:17,435 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 323 flow [2022-11-23 03:21:17,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=323, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2022-11-23 03:21:17,435 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2022-11-23 03:21:17,436 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 323 flow [2022-11-23 03:21:17,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 59.27272727272727) internal successors, (652), 11 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:17,436 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:17,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:17,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:17,642 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:17,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:17,643 INFO L85 PathProgramCache]: Analyzing trace with hash 193298768, now seen corresponding path program 3 times [2022-11-23 03:21:17,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:17,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717456631] [2022-11-23 03:21:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:17,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717456631] [2022-11-23 03:21:17,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717456631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:17,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80164507] [2022-11-23 03:21:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:21:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:17,750 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:17,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:21:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:21:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:17,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:17,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80164507] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:17,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:17,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:21:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412567281] [2022-11-23 03:21:17,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:17,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:21:17,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:17,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:21:17,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:21:17,982 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:17,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 323 flow. Second operand has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:17,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:17,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:17,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:18,429 INFO L130 PetriNetUnfolder]: 272/540 cut-off events. [2022-11-23 03:21:18,429 INFO L131 PetriNetUnfolder]: For 1658/1658 co-relation queries the response was YES. [2022-11-23 03:21:18,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2260 conditions, 540 events. 272/540 cut-off events. For 1658/1658 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2516 event pairs, 9 based on Foata normal form. 16/556 useless extension candidates. Maximal degree in co-relation 1596. Up to 185 conditions per place. [2022-11-23 03:21:18,434 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 85 selfloop transitions, 51 changer transitions 7/143 dead transitions. [2022-11-23 03:21:18,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 143 transitions, 1233 flow [2022-11-23 03:21:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 03:21:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 03:21:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1250 transitions. [2022-11-23 03:21:18,439 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-23 03:21:18,439 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1250 transitions. [2022-11-23 03:21:18,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1250 transitions. [2022-11-23 03:21:18,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:18,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1250 transitions. [2022-11-23 03:21:18,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 62.5) internal successors, (1250), 20 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:18,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 135.0) internal successors, (2835), 21 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:18,450 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 135.0) internal successors, (2835), 21 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:18,450 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 323 flow. Second operand 20 states and 1250 transitions. [2022-11-23 03:21:18,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 143 transitions, 1233 flow [2022-11-23 03:21:18,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 143 transitions, 1190 flow, removed 18 selfloop flow, removed 2 redundant places. [2022-11-23 03:21:18,460 INFO L231 Difference]: Finished difference. Result has 72 places, 81 transitions, 856 flow [2022-11-23 03:21:18,461 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=856, PETRI_PLACES=72, PETRI_TRANSITIONS=81} [2022-11-23 03:21:18,462 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2022-11-23 03:21:18,462 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 81 transitions, 856 flow [2022-11-23 03:21:18,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:18,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:18,463 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:18,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:21:18,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2082807056, now seen corresponding path program 4 times [2022-11-23 03:21:18,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:18,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518131396] [2022-11-23 03:21:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:18,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518131396] [2022-11-23 03:21:18,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518131396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:18,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349401641] [2022-11-23 03:21:18,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:21:18,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:18,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:18,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:18,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:21:18,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:21:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:18,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349401641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:18,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:18,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-23 03:21:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664082271] [2022-11-23 03:21:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:18,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:21:18,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:21:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:21:19,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:19,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 81 transitions, 856 flow. Second operand has 13 states, 13 states have (on average 59.38461538461539) internal successors, (772), 13 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:19,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:19,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:19,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:19,450 INFO L130 PetriNetUnfolder]: 315/634 cut-off events. [2022-11-23 03:21:19,450 INFO L131 PetriNetUnfolder]: For 3412/3412 co-relation queries the response was YES. [2022-11-23 03:21:19,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 634 events. 315/634 cut-off events. For 3412/3412 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3128 event pairs, 23 based on Foata normal form. 38/672 useless extension candidates. Maximal degree in co-relation 2419. Up to 476 conditions per place. [2022-11-23 03:21:19,457 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 98 selfloop transitions, 41 changer transitions 0/139 dead transitions. [2022-11-23 03:21:19,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 1593 flow [2022-11-23 03:21:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:21:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:21:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 696 transitions. [2022-11-23 03:21:19,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4686868686868687 [2022-11-23 03:21:19,461 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 696 transitions. [2022-11-23 03:21:19,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 696 transitions. [2022-11-23 03:21:19,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:19,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 696 transitions. [2022-11-23 03:21:19,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 63.27272727272727) internal successors, (696), 11 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:19,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:19,468 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:19,468 INFO L175 Difference]: Start difference. First operand has 72 places, 81 transitions, 856 flow. Second operand 11 states and 696 transitions. [2022-11-23 03:21:19,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 1593 flow [2022-11-23 03:21:19,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 139 transitions, 1243 flow, removed 160 selfloop flow, removed 6 redundant places. [2022-11-23 03:21:19,502 INFO L231 Difference]: Finished difference. Result has 81 places, 105 transitions, 1002 flow [2022-11-23 03:21:19,503 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1002, PETRI_PLACES=81, PETRI_TRANSITIONS=105} [2022-11-23 03:21:19,503 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2022-11-23 03:21:19,503 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 105 transitions, 1002 flow [2022-11-23 03:21:19,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 59.38461538461539) internal successors, (772), 13 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:19,504 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:19,504 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:19,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:19,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 03:21:19,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:19,711 INFO L85 PathProgramCache]: Analyzing trace with hash -733892078, now seen corresponding path program 5 times [2022-11-23 03:21:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306161418] [2022-11-23 03:21:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:19,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:19,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306161418] [2022-11-23 03:21:19,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306161418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805971003] [2022-11-23 03:21:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:21:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:19,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:19,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:21:19,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:19,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:19,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:19,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:19,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805971003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:20,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:20,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-23 03:21:20,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931003960] [2022-11-23 03:21:20,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:21:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:21:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:21:20,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:20,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 105 transitions, 1002 flow. Second operand has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:20,084 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:20,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:20,449 INFO L130 PetriNetUnfolder]: 294/587 cut-off events. [2022-11-23 03:21:20,450 INFO L131 PetriNetUnfolder]: For 2898/2898 co-relation queries the response was YES. [2022-11-23 03:21:20,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2767 conditions, 587 events. 294/587 cut-off events. For 2898/2898 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2850 event pairs, 9 based on Foata normal form. 34/621 useless extension candidates. Maximal degree in co-relation 2530. Up to 220 conditions per place. [2022-11-23 03:21:20,455 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 79 selfloop transitions, 64 changer transitions 7/150 dead transitions. [2022-11-23 03:21:20,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 150 transitions, 1520 flow [2022-11-23 03:21:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:21:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:21:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 886 transitions. [2022-11-23 03:21:20,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4687830687830688 [2022-11-23 03:21:20,459 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 886 transitions. [2022-11-23 03:21:20,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 886 transitions. [2022-11-23 03:21:20,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:20,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 886 transitions. [2022-11-23 03:21:20,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 63.285714285714285) internal successors, (886), 14 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:20,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 135.0) internal successors, (2025), 15 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:20,466 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 135.0) internal successors, (2025), 15 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:20,466 INFO L175 Difference]: Start difference. First operand has 81 places, 105 transitions, 1002 flow. Second operand 14 states and 886 transitions. [2022-11-23 03:21:20,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 150 transitions, 1520 flow [2022-11-23 03:21:20,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 150 transitions, 1388 flow, removed 51 selfloop flow, removed 7 redundant places. [2022-11-23 03:21:20,485 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 1057 flow [2022-11-23 03:21:20,486 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1057, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2022-11-23 03:21:20,486 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 69 predicate places. [2022-11-23 03:21:20,486 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 1057 flow [2022-11-23 03:21:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.25) internal successors, (711), 12 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:20,487 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:20,487 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:20,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:20,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:20,693 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:20,694 INFO L85 PathProgramCache]: Analyzing trace with hash -566337326, now seen corresponding path program 6 times [2022-11-23 03:21:20,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:20,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396790349] [2022-11-23 03:21:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:20,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:20,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396790349] [2022-11-23 03:21:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396790349] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266675938] [2022-11-23 03:21:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:21:20,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:20,793 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:20,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:21:20,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:21:20,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:20,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:20,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:20,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266675938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:20,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:20,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 03:21:20,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717580721] [2022-11-23 03:21:20,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:20,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:21:20,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:20,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:21:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:21:21,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:21,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 1057 flow. Second operand has 15 states, 15 states have (on average 58.733333333333334) internal successors, (881), 15 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:21,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:21,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:21,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:21,444 INFO L130 PetriNetUnfolder]: 356/718 cut-off events. [2022-11-23 03:21:21,444 INFO L131 PetriNetUnfolder]: For 3485/3485 co-relation queries the response was YES. [2022-11-23 03:21:21,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 718 events. 356/718 cut-off events. For 3485/3485 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3650 event pairs, 81 based on Foata normal form. 42/760 useless extension candidates. Maximal degree in co-relation 3159. Up to 432 conditions per place. [2022-11-23 03:21:21,452 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 126 selfloop transitions, 47 changer transitions 3/176 dead transitions. [2022-11-23 03:21:21,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 176 transitions, 1907 flow [2022-11-23 03:21:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 03:21:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 03:21:21,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 832 transitions. [2022-11-23 03:21:21,456 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2022-11-23 03:21:21,456 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 832 transitions. [2022-11-23 03:21:21,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 832 transitions. [2022-11-23 03:21:21,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:21,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 832 transitions. [2022-11-23 03:21:21,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 64.0) internal successors, (832), 13 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:21,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 135.0) internal successors, (1890), 14 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:21,463 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 135.0) internal successors, (1890), 14 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:21,463 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 1057 flow. Second operand 13 states and 832 transitions. [2022-11-23 03:21:21,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 176 transitions, 1907 flow [2022-11-23 03:21:21,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 176 transitions, 1841 flow, removed 9 selfloop flow, removed 8 redundant places. [2022-11-23 03:21:21,488 INFO L231 Difference]: Finished difference. Result has 100 places, 125 transitions, 1470 flow [2022-11-23 03:21:21,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1470, PETRI_PLACES=100, PETRI_TRANSITIONS=125} [2022-11-23 03:21:21,489 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-11-23 03:21:21,489 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 125 transitions, 1470 flow [2022-11-23 03:21:21,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.733333333333334) internal successors, (881), 15 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:21,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:21,490 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:21,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:21,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 03:21:21,696 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 274697824, now seen corresponding path program 7 times [2022-11-23 03:21:21,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:21,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166736619] [2022-11-23 03:21:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:21,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:21,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166736619] [2022-11-23 03:21:21,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166736619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:21,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061074513] [2022-11-23 03:21:21,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:21:21,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:21,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:21,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:21:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:21:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:21,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:21,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:21,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061074513] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:21,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:21,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-11-23 03:21:21,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841887963] [2022-11-23 03:21:21,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 03:21:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 03:21:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:21:22,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:22,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 125 transitions, 1470 flow. Second operand has 13 states, 13 states have (on average 58.92307692307692) internal successors, (766), 13 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:22,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:22,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:22,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:22,508 INFO L130 PetriNetUnfolder]: 371/743 cut-off events. [2022-11-23 03:21:22,508 INFO L131 PetriNetUnfolder]: For 5878/5878 co-relation queries the response was YES. [2022-11-23 03:21:22,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4078 conditions, 743 events. 371/743 cut-off events. For 5878/5878 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3809 event pairs, 39 based on Foata normal form. 6/749 useless extension candidates. Maximal degree in co-relation 3756. Up to 216 conditions per place. [2022-11-23 03:21:22,517 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 95 selfloop transitions, 80 changer transitions 8/183 dead transitions. [2022-11-23 03:21:22,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 183 transitions, 2268 flow [2022-11-23 03:21:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:21:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 03:21:22,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1055 transitions. [2022-11-23 03:21:22,525 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4596949891067538 [2022-11-23 03:21:22,525 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1055 transitions. [2022-11-23 03:21:22,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1055 transitions. [2022-11-23 03:21:22,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:22,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1055 transitions. [2022-11-23 03:21:22,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.05882352941177) internal successors, (1055), 17 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:22,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 135.0) internal successors, (2430), 18 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:22,533 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 135.0) internal successors, (2430), 18 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:22,534 INFO L175 Difference]: Start difference. First operand has 100 places, 125 transitions, 1470 flow. Second operand 17 states and 1055 transitions. [2022-11-23 03:21:22,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 183 transitions, 2268 flow [2022-11-23 03:21:22,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 2016 flow, removed 115 selfloop flow, removed 3 redundant places. [2022-11-23 03:21:22,576 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1615 flow [2022-11-23 03:21:22,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1615, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2022-11-23 03:21:22,577 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 98 predicate places. [2022-11-23 03:21:22,577 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1615 flow [2022-11-23 03:21:22,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.92307692307692) internal successors, (766), 13 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:22,578 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:22,578 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:22,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:22,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:22,784 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:22,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1147516533, now seen corresponding path program 8 times [2022-11-23 03:21:22,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:22,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819699696] [2022-11-23 03:21:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:22,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:22,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819699696] [2022-11-23 03:21:22,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819699696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236616844] [2022-11-23 03:21:22,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:22,939 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:22,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:21:23,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:23,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:23,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:21:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:23,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:23,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236616844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:23,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:23,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-23 03:21:23,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82284694] [2022-11-23 03:21:23,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:23,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:21:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:23,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:21:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:21:23,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 135 [2022-11-23 03:21:23,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1615 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:23,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:23,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 135 [2022-11-23 03:21:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:23,444 INFO L130 PetriNetUnfolder]: 606/1215 cut-off events. [2022-11-23 03:21:23,444 INFO L131 PetriNetUnfolder]: For 9280/9291 co-relation queries the response was YES. [2022-11-23 03:21:23,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6942 conditions, 1215 events. 606/1215 cut-off events. For 9280/9291 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7215 event pairs, 61 based on Foata normal form. 30/1243 useless extension candidates. Maximal degree in co-relation 6634. Up to 578 conditions per place. [2022-11-23 03:21:23,459 INFO L137 encePairwiseOnDemand]: 131/135 looper letters, 145 selfloop transitions, 63 changer transitions 50/265 dead transitions. [2022-11-23 03:21:23,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 265 transitions, 3489 flow [2022-11-23 03:21:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:21:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:21:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 376 transitions. [2022-11-23 03:21:23,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.557037037037037 [2022-11-23 03:21:23,461 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 376 transitions. [2022-11-23 03:21:23,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 376 transitions. [2022-11-23 03:21:23,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:23,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 376 transitions. [2022-11-23 03:21:23,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.2) internal successors, (376), 5 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:23,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:23,464 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:23,464 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1615 flow. Second operand 5 states and 376 transitions. [2022-11-23 03:21:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 265 transitions, 3489 flow [2022-11-23 03:21:23,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 265 transitions, 3317 flow, removed 67 selfloop flow, removed 3 redundant places. [2022-11-23 03:21:23,521 INFO L231 Difference]: Finished difference. Result has 121 places, 180 transitions, 2387 flow [2022-11-23 03:21:23,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2387, PETRI_PLACES=121, PETRI_TRANSITIONS=180} [2022-11-23 03:21:23,522 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 101 predicate places. [2022-11-23 03:21:23,522 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 180 transitions, 2387 flow [2022-11-23 03:21:23,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:23,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:23,523 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:23,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:21:23,731 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1257863757, now seen corresponding path program 9 times [2022-11-23 03:21:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124433332] [2022-11-23 03:21:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:23,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:23,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124433332] [2022-11-23 03:21:23,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124433332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:23,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078278850] [2022-11-23 03:21:23,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:21:23,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:23,842 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:21:23,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:21:23,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:24,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:24,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078278850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:24,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:24,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 03:21:24,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220218351] [2022-11-23 03:21:24,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:21:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:21:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:21:24,152 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:24,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 180 transitions, 2387 flow. Second operand has 15 states, 15 states have (on average 59.0) internal successors, (885), 15 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:24,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:24,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:24,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:25,261 INFO L130 PetriNetUnfolder]: 773/1637 cut-off events. [2022-11-23 03:21:25,261 INFO L131 PetriNetUnfolder]: For 15716/15716 co-relation queries the response was YES. [2022-11-23 03:21:25,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 1637 events. 773/1637 cut-off events. For 15716/15716 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10844 event pairs, 27 based on Foata normal form. 24/1661 useless extension candidates. Maximal degree in co-relation 9743. Up to 346 conditions per place. [2022-11-23 03:21:25,285 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 155 selfloop transitions, 187 changer transitions 21/363 dead transitions. [2022-11-23 03:21:25,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 363 transitions, 4935 flow [2022-11-23 03:21:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 03:21:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 03:21:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2055 transitions. [2022-11-23 03:21:25,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4612794612794613 [2022-11-23 03:21:25,293 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2055 transitions. [2022-11-23 03:21:25,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2055 transitions. [2022-11-23 03:21:25,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:25,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2055 transitions. [2022-11-23 03:21:25,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 62.27272727272727) internal successors, (2055), 33 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:25,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 135.0) internal successors, (4590), 34 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:25,315 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 135.0) internal successors, (4590), 34 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:25,315 INFO L175 Difference]: Start difference. First operand has 121 places, 180 transitions, 2387 flow. Second operand 33 states and 2055 transitions. [2022-11-23 03:21:25,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 363 transitions, 4935 flow [2022-11-23 03:21:25,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 363 transitions, 4757 flow, removed 67 selfloop flow, removed 1 redundant places. [2022-11-23 03:21:25,435 INFO L231 Difference]: Finished difference. Result has 165 places, 257 transitions, 4159 flow [2022-11-23 03:21:25,435 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4159, PETRI_PLACES=165, PETRI_TRANSITIONS=257} [2022-11-23 03:21:25,436 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2022-11-23 03:21:25,436 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 257 transitions, 4159 flow [2022-11-23 03:21:25,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.0) internal successors, (885), 15 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:25,436 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:25,437 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:25,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:21:25,642 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1527312111, now seen corresponding path program 10 times [2022-11-23 03:21:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:25,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952004637] [2022-11-23 03:21:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:25,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:25,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:25,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952004637] [2022-11-23 03:21:25,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952004637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:25,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416606920] [2022-11-23 03:21:25,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:21:25,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:25,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:25,751 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:25,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:21:25,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:21:25,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:25,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:25,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416606920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:25,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:25,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-23 03:21:25,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776699523] [2022-11-23 03:21:25,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:25,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:21:25,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:25,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:21:25,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:21:26,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:26,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 257 transitions, 4159 flow. Second operand has 14 states, 14 states have (on average 58.857142857142854) internal successors, (824), 14 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:26,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:26,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:26,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:26,714 INFO L130 PetriNetUnfolder]: 895/1851 cut-off events. [2022-11-23 03:21:26,714 INFO L131 PetriNetUnfolder]: For 30739/30739 co-relation queries the response was YES. [2022-11-23 03:21:26,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13353 conditions, 1851 events. 895/1851 cut-off events. For 30739/30739 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 12365 event pairs, 101 based on Foata normal form. 36/1887 useless extension candidates. Maximal degree in co-relation 13058. Up to 1436 conditions per place. [2022-11-23 03:21:26,749 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 274 selfloop transitions, 60 changer transitions 25/359 dead transitions. [2022-11-23 03:21:26,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 359 transitions, 6344 flow [2022-11-23 03:21:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:21:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 03:21:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2022-11-23 03:21:26,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47160493827160493 [2022-11-23 03:21:26,751 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 573 transitions. [2022-11-23 03:21:26,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 573 transitions. [2022-11-23 03:21:26,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:26,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 573 transitions. [2022-11-23 03:21:26,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 63.666666666666664) internal successors, (573), 9 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:26,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 135.0) internal successors, (1350), 10 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:26,755 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 135.0) internal successors, (1350), 10 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:26,756 INFO L175 Difference]: Start difference. First operand has 165 places, 257 transitions, 4159 flow. Second operand 9 states and 573 transitions. [2022-11-23 03:21:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 359 transitions, 6344 flow [2022-11-23 03:21:27,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 359 transitions, 5274 flow, removed 444 selfloop flow, removed 12 redundant places. [2022-11-23 03:21:27,112 INFO L231 Difference]: Finished difference. Result has 163 places, 294 transitions, 4221 flow [2022-11-23 03:21:27,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4221, PETRI_PLACES=163, PETRI_TRANSITIONS=294} [2022-11-23 03:21:27,114 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2022-11-23 03:21:27,115 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 294 transitions, 4221 flow [2022-11-23 03:21:27,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.857142857142854) internal successors, (824), 14 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:27,115 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:27,116 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:27,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:27,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 03:21:27,321 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash -267752387, now seen corresponding path program 11 times [2022-11-23 03:21:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:27,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153522546] [2022-11-23 03:21:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:27,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153522546] [2022-11-23 03:21:27,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153522546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:27,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047527724] [2022-11-23 03:21:27,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:21:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:27,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:27,423 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:27,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:21:27,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:21:27,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:27,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:27,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047527724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:27,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:27,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 03:21:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345675785] [2022-11-23 03:21:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:27,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:21:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:21:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:21:27,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:27,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 294 transitions, 4221 flow. Second operand has 15 states, 15 states have (on average 59.0) internal successors, (885), 15 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:27,764 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:27,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:27,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:28,640 INFO L130 PetriNetUnfolder]: 939/1915 cut-off events. [2022-11-23 03:21:28,640 INFO L131 PetriNetUnfolder]: For 29852/29852 co-relation queries the response was YES. [2022-11-23 03:21:28,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12961 conditions, 1915 events. 939/1915 cut-off events. For 29852/29852 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 12793 event pairs, 71 based on Foata normal form. 82/1997 useless extension candidates. Maximal degree in co-relation 12666. Up to 1267 conditions per place. [2022-11-23 03:21:28,670 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 240 selfloop transitions, 129 changer transitions 7/376 dead transitions. [2022-11-23 03:21:28,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 376 transitions, 5805 flow [2022-11-23 03:21:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:21:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 03:21:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1010 transitions. [2022-11-23 03:21:28,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2022-11-23 03:21:28,673 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1010 transitions. [2022-11-23 03:21:28,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1010 transitions. [2022-11-23 03:21:28,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:28,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1010 transitions. [2022-11-23 03:21:28,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.125) internal successors, (1010), 16 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:28,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 135.0) internal successors, (2295), 17 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:28,685 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 135.0) internal successors, (2295), 17 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:28,685 INFO L175 Difference]: Start difference. First operand has 163 places, 294 transitions, 4221 flow. Second operand 16 states and 1010 transitions. [2022-11-23 03:21:28,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 376 transitions, 5805 flow [2022-11-23 03:21:28,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 376 transitions, 5741 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-11-23 03:21:28,896 INFO L231 Difference]: Finished difference. Result has 178 places, 312 transitions, 4901 flow [2022-11-23 03:21:28,897 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4901, PETRI_PLACES=178, PETRI_TRANSITIONS=312} [2022-11-23 03:21:28,897 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 158 predicate places. [2022-11-23 03:21:28,897 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 312 transitions, 4901 flow [2022-11-23 03:21:28,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.0) internal successors, (885), 15 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:28,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:28,898 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:28,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:29,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:21:29,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:29,111 INFO L85 PathProgramCache]: Analyzing trace with hash -218464743, now seen corresponding path program 12 times [2022-11-23 03:21:29,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:29,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103024984] [2022-11-23 03:21:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:29,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:29,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:29,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103024984] [2022-11-23 03:21:29,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103024984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:29,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299666797] [2022-11-23 03:21:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:21:29,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:29,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:29,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:29,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:21:29,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-23 03:21:29,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:29,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:29,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299666797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:29,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:29,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-23 03:21:29,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534590293] [2022-11-23 03:21:29,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:29,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:21:29,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:21:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:21:29,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:29,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 312 transitions, 4901 flow. Second operand has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:29,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:29,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:29,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:30,585 INFO L130 PetriNetUnfolder]: 907/1850 cut-off events. [2022-11-23 03:21:30,585 INFO L131 PetriNetUnfolder]: For 30768/30768 co-relation queries the response was YES. [2022-11-23 03:21:30,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13302 conditions, 1850 events. 907/1850 cut-off events. For 30768/30768 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 12206 event pairs, 45 based on Foata normal form. 42/1892 useless extension candidates. Maximal degree in co-relation 13004. Up to 582 conditions per place. [2022-11-23 03:21:30,613 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 183 selfloop transitions, 198 changer transitions 0/381 dead transitions. [2022-11-23 03:21:30,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 381 transitions, 6171 flow [2022-11-23 03:21:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:21:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-23 03:21:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1382 transitions. [2022-11-23 03:21:30,618 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4653198653198653 [2022-11-23 03:21:30,618 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1382 transitions. [2022-11-23 03:21:30,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1382 transitions. [2022-11-23 03:21:30,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:30,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1382 transitions. [2022-11-23 03:21:30,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 62.81818181818182) internal successors, (1382), 22 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:30,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 135.0) internal successors, (3105), 23 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:30,628 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 135.0) internal successors, (3105), 23 states have internal predecessors, (3105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:30,628 INFO L175 Difference]: Start difference. First operand has 178 places, 312 transitions, 4901 flow. Second operand 22 states and 1382 transitions. [2022-11-23 03:21:30,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 381 transitions, 6171 flow [2022-11-23 03:21:30,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 381 transitions, 5945 flow, removed 55 selfloop flow, removed 9 redundant places. [2022-11-23 03:21:30,844 INFO L231 Difference]: Finished difference. Result has 190 places, 310 transitions, 5224 flow [2022-11-23 03:21:30,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=4606, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5224, PETRI_PLACES=190, PETRI_TRANSITIONS=310} [2022-11-23 03:21:30,844 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2022-11-23 03:21:30,845 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 310 transitions, 5224 flow [2022-11-23 03:21:30,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.8) internal successors, (882), 15 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:30,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:30,846 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:30,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:31,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:31,046 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:31,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:31,047 INFO L85 PathProgramCache]: Analyzing trace with hash 96771799, now seen corresponding path program 13 times [2022-11-23 03:21:31,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:31,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287107995] [2022-11-23 03:21:31,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:31,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:31,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287107995] [2022-11-23 03:21:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287107995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520116194] [2022-11-23 03:21:31,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:21:31,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:31,150 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:31,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:21:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:31,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:31,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:31,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520116194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:31,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:31,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-23 03:21:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276205408] [2022-11-23 03:21:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:21:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:21:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:21:31,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:31,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 310 transitions, 5224 flow. Second operand has 18 states, 18 states have (on average 59.0) internal successors, (1062), 18 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:31,513 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:31,513 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:31,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:32,806 INFO L130 PetriNetUnfolder]: 1391/2738 cut-off events. [2022-11-23 03:21:32,806 INFO L131 PetriNetUnfolder]: For 49761/49761 co-relation queries the response was YES. [2022-11-23 03:21:32,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21017 conditions, 2738 events. 1391/2738 cut-off events. For 49761/49761 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 19074 event pairs, 79 based on Foata normal form. 28/2766 useless extension candidates. Maximal degree in co-relation 20718. Up to 1664 conditions per place. [2022-11-23 03:21:32,847 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 334 selfloop transitions, 224 changer transitions 3/561 dead transitions. [2022-11-23 03:21:32,847 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 561 transitions, 10252 flow [2022-11-23 03:21:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 03:21:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 03:21:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1264 transitions. [2022-11-23 03:21:32,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46814814814814815 [2022-11-23 03:21:32,851 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1264 transitions. [2022-11-23 03:21:32,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1264 transitions. [2022-11-23 03:21:32,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:32,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1264 transitions. [2022-11-23 03:21:32,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.2) internal successors, (1264), 20 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:32,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 135.0) internal successors, (2835), 21 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:32,859 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 135.0) internal successors, (2835), 21 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:32,859 INFO L175 Difference]: Start difference. First operand has 190 places, 310 transitions, 5224 flow. Second operand 20 states and 1264 transitions. [2022-11-23 03:21:32,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 561 transitions, 10252 flow [2022-11-23 03:21:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 561 transitions, 9772 flow, removed 51 selfloop flow, removed 17 redundant places. [2022-11-23 03:21:33,178 INFO L231 Difference]: Finished difference. Result has 201 places, 465 transitions, 8731 flow [2022-11-23 03:21:33,179 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=4954, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8731, PETRI_PLACES=201, PETRI_TRANSITIONS=465} [2022-11-23 03:21:33,179 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 181 predicate places. [2022-11-23 03:21:33,179 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 465 transitions, 8731 flow [2022-11-23 03:21:33,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 59.0) internal successors, (1062), 18 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:33,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:33,180 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:33,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-23 03:21:33,385 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash -360083049, now seen corresponding path program 14 times [2022-11-23 03:21:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:33,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592896724] [2022-11-23 03:21:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592896724] [2022-11-23 03:21:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592896724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574278541] [2022-11-23 03:21:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:21:33,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:33,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:33,509 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:33,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 03:21:33,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:21:33,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:33,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:33,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:33,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574278541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:33,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:33,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-11-23 03:21:33,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951705238] [2022-11-23 03:21:33,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:21:33,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:21:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:21:33,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:33,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 465 transitions, 8731 flow. Second operand has 15 states, 15 states have (on average 59.06666666666667) internal successors, (886), 15 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:33,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:33,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:33,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:35,499 INFO L130 PetriNetUnfolder]: 1719/3395 cut-off events. [2022-11-23 03:21:35,499 INFO L131 PetriNetUnfolder]: For 74435/74435 co-relation queries the response was YES. [2022-11-23 03:21:35,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27726 conditions, 3395 events. 1719/3395 cut-off events. For 74435/74435 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 24573 event pairs, 73 based on Foata normal form. 74/3469 useless extension candidates. Maximal degree in co-relation 27418. Up to 1190 conditions per place. [2022-11-23 03:21:35,555 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 256 selfloop transitions, 404 changer transitions 8/668 dead transitions. [2022-11-23 03:21:35,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 668 transitions, 13048 flow [2022-11-23 03:21:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:21:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:21:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1323 transitions. [2022-11-23 03:21:35,561 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-11-23 03:21:35,561 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1323 transitions. [2022-11-23 03:21:35,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1323 transitions. [2022-11-23 03:21:35,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:35,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1323 transitions. [2022-11-23 03:21:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.0) internal successors, (1323), 21 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:35,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:35,570 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:35,571 INFO L175 Difference]: Start difference. First operand has 201 places, 465 transitions, 8731 flow. Second operand 21 states and 1323 transitions. [2022-11-23 03:21:35,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 668 transitions, 13048 flow [2022-11-23 03:21:36,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 668 transitions, 12634 flow, removed 191 selfloop flow, removed 4 redundant places. [2022-11-23 03:21:36,230 INFO L231 Difference]: Finished difference. Result has 225 places, 574 transitions, 11899 flow [2022-11-23 03:21:36,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=8367, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11899, PETRI_PLACES=225, PETRI_TRANSITIONS=574} [2022-11-23 03:21:36,231 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2022-11-23 03:21:36,232 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 574 transitions, 11899 flow [2022-11-23 03:21:36,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.06666666666667) internal successors, (886), 15 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:36,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:36,232 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:36,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:36,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:36,437 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:36,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:36,438 INFO L85 PathProgramCache]: Analyzing trace with hash 88750583, now seen corresponding path program 15 times [2022-11-23 03:21:36,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:36,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870053004] [2022-11-23 03:21:36,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:36,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:36,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:36,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870053004] [2022-11-23 03:21:36,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870053004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:36,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632243543] [2022-11-23 03:21:36,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:21:36,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:36,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:36,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 03:21:36,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:21:36,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:36,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:36,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:36,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632243543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:36,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:36,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-23 03:21:36,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964566252] [2022-11-23 03:21:36,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:36,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 03:21:36,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:36,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 03:21:36,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:21:36,861 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:36,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 574 transitions, 11899 flow. Second operand has 20 states, 20 states have (on average 58.6) internal successors, (1172), 20 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:36,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:36,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:36,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:38,718 INFO L130 PetriNetUnfolder]: 1826/3600 cut-off events. [2022-11-23 03:21:38,718 INFO L131 PetriNetUnfolder]: For 104607/104607 co-relation queries the response was YES. [2022-11-23 03:21:38,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31606 conditions, 3600 events. 1826/3600 cut-off events. For 104607/104607 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26171 event pairs, 559 based on Foata normal form. 104/3704 useless extension candidates. Maximal degree in co-relation 31112. Up to 2820 conditions per place. [2022-11-23 03:21:38,772 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 567 selfloop transitions, 133 changer transitions 14/714 dead transitions. [2022-11-23 03:21:38,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 714 transitions, 15191 flow [2022-11-23 03:21:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:21:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:21:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1338 transitions. [2022-11-23 03:21:38,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47195767195767196 [2022-11-23 03:21:38,777 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1338 transitions. [2022-11-23 03:21:38,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1338 transitions. [2022-11-23 03:21:38,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:38,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1338 transitions. [2022-11-23 03:21:38,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.714285714285715) internal successors, (1338), 21 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:38,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:38,787 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:38,787 INFO L175 Difference]: Start difference. First operand has 225 places, 574 transitions, 11899 flow. Second operand 21 states and 1338 transitions. [2022-11-23 03:21:38,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 714 transitions, 15191 flow [2022-11-23 03:21:39,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 714 transitions, 14728 flow, removed 203 selfloop flow, removed 9 redundant places. [2022-11-23 03:21:39,872 INFO L231 Difference]: Finished difference. Result has 246 places, 625 transitions, 13212 flow [2022-11-23 03:21:39,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=11436, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13212, PETRI_PLACES=246, PETRI_TRANSITIONS=625} [2022-11-23 03:21:39,873 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 226 predicate places. [2022-11-23 03:21:39,873 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 625 transitions, 13212 flow [2022-11-23 03:21:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 58.6) internal successors, (1172), 20 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:39,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:39,874 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:39,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:40,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:40,074 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:40,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1998985061, now seen corresponding path program 16 times [2022-11-23 03:21:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:40,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890854277] [2022-11-23 03:21:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:40,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890854277] [2022-11-23 03:21:40,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890854277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217667303] [2022-11-23 03:21:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:21:40,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:40,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:40,175 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:40,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 03:21:40,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:21:40,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:21:40,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:40,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:40,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217667303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:40,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:40,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2022-11-23 03:21:40,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702047500] [2022-11-23 03:21:40,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:40,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:21:40,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:40,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:21:40,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-23 03:21:40,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:40,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 625 transitions, 13212 flow. Second operand has 17 states, 17 states have (on average 58.76470588235294) internal successors, (999), 17 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:40,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:40,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:40,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:42,144 INFO L130 PetriNetUnfolder]: 1861/3651 cut-off events. [2022-11-23 03:21:42,144 INFO L131 PetriNetUnfolder]: For 109347/109347 co-relation queries the response was YES. [2022-11-23 03:21:42,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32718 conditions, 3651 events. 1861/3651 cut-off events. For 109347/109347 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 26528 event pairs, 208 based on Foata normal form. 6/3657 useless extension candidates. Maximal degree in co-relation 31964. Up to 1180 conditions per place. [2022-11-23 03:21:42,186 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 386 selfloop transitions, 326 changer transitions 11/723 dead transitions. [2022-11-23 03:21:42,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 723 transitions, 15820 flow [2022-11-23 03:21:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 03:21:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 03:21:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1603 transitions. [2022-11-23 03:21:42,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4566951566951567 [2022-11-23 03:21:42,190 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1603 transitions. [2022-11-23 03:21:42,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1603 transitions. [2022-11-23 03:21:42,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:42,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1603 transitions. [2022-11-23 03:21:42,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 61.65384615384615) internal successors, (1603), 26 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:42,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 135.0) internal successors, (3645), 27 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:42,200 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 135.0) internal successors, (3645), 27 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:42,201 INFO L175 Difference]: Start difference. First operand has 246 places, 625 transitions, 13212 flow. Second operand 26 states and 1603 transitions. [2022-11-23 03:21:42,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 723 transitions, 15820 flow [2022-11-23 03:21:43,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 723 transitions, 14593 flow, removed 609 selfloop flow, removed 3 redundant places. [2022-11-23 03:21:43,518 INFO L231 Difference]: Finished difference. Result has 272 places, 658 transitions, 13444 flow [2022-11-23 03:21:43,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=12217, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=13444, PETRI_PLACES=272, PETRI_TRANSITIONS=658} [2022-11-23 03:21:43,519 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2022-11-23 03:21:43,519 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 658 transitions, 13444 flow [2022-11-23 03:21:43,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.76470588235294) internal successors, (999), 17 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:43,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:43,520 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:43,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-23 03:21:43,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:43,725 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1586544262, now seen corresponding path program 17 times [2022-11-23 03:21:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:43,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828356618] [2022-11-23 03:21:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:43,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828356618] [2022-11-23 03:21:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828356618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:43,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043201930] [2022-11-23 03:21:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:21:43,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:43,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:43,872 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:43,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 03:21:43,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:21:43,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:43,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:21:43,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:44,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:21:44,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043201930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:44,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:44,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-23 03:21:44,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919823718] [2022-11-23 03:21:44,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:44,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:21:44,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:44,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:21:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:21:44,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 135 [2022-11-23 03:21:44,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 658 transitions, 13444 flow. Second operand has 6 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:44,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:44,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 135 [2022-11-23 03:21:44,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:46,185 INFO L130 PetriNetUnfolder]: 2791/5425 cut-off events. [2022-11-23 03:21:46,185 INFO L131 PetriNetUnfolder]: For 148186/148197 co-relation queries the response was YES. [2022-11-23 03:21:46,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47802 conditions, 5425 events. 2791/5425 cut-off events. For 148186/148197 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42194 event pairs, 213 based on Foata normal form. 35/5458 useless extension candidates. Maximal degree in co-relation 46595. Up to 2809 conditions per place. [2022-11-23 03:21:46,263 INFO L137 encePairwiseOnDemand]: 131/135 looper letters, 595 selfloop transitions, 362 changer transitions 122/1087 dead transitions. [2022-11-23 03:21:46,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1087 transitions, 23520 flow [2022-11-23 03:21:46,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:21:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:21:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 453 transitions. [2022-11-23 03:21:46,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5592592592592592 [2022-11-23 03:21:46,265 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 453 transitions. [2022-11-23 03:21:46,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 453 transitions. [2022-11-23 03:21:46,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:46,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 453 transitions. [2022-11-23 03:21:46,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:46,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:46,268 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:46,268 INFO L175 Difference]: Start difference. First operand has 272 places, 658 transitions, 13444 flow. Second operand 6 states and 453 transitions. [2022-11-23 03:21:46,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1087 transitions, 23520 flow [2022-11-23 03:21:48,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1087 transitions, 22976 flow, removed 222 selfloop flow, removed 8 redundant places. [2022-11-23 03:21:48,121 INFO L231 Difference]: Finished difference. Result has 272 places, 882 transitions, 19403 flow [2022-11-23 03:21:48,121 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=13165, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=19403, PETRI_PLACES=272, PETRI_TRANSITIONS=882} [2022-11-23 03:21:48,122 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2022-11-23 03:21:48,122 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 882 transitions, 19403 flow [2022-11-23 03:21:48,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:48,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:48,123 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:48,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:48,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:48,328 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:48,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:48,329 INFO L85 PathProgramCache]: Analyzing trace with hash 562110794, now seen corresponding path program 18 times [2022-11-23 03:21:48,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:48,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893583152] [2022-11-23 03:21:48,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:48,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:48,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893583152] [2022-11-23 03:21:48,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893583152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:48,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725437271] [2022-11-23 03:21:48,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:21:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:48,455 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:48,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 03:21:48,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-23 03:21:48,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:21:48,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:21:48,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:48,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725437271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:48,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:48,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-23 03:21:48,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362490521] [2022-11-23 03:21:48,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:48,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:21:48,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:21:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-23 03:21:48,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:48,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 882 transitions, 19403 flow. Second operand has 17 states, 17 states have (on average 58.88235294117647) internal successors, (1001), 17 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:48,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:48,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:48,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:51,743 INFO L130 PetriNetUnfolder]: 3118/6110 cut-off events. [2022-11-23 03:21:51,743 INFO L131 PetriNetUnfolder]: For 190187/190187 co-relation queries the response was YES. [2022-11-23 03:21:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57374 conditions, 6110 events. 3118/6110 cut-off events. For 190187/190187 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 48745 event pairs, 229 based on Foata normal form. 40/6150 useless extension candidates. Maximal degree in co-relation 55657. Up to 4735 conditions per place. [2022-11-23 03:21:51,811 INFO L137 encePairwiseOnDemand]: 130/135 looper letters, 909 selfloop transitions, 211 changer transitions 51/1171 dead transitions. [2022-11-23 03:21:51,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 1171 transitions, 27653 flow [2022-11-23 03:21:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:21:51,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 03:21:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 704 transitions. [2022-11-23 03:21:51,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2022-11-23 03:21:51,813 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 704 transitions. [2022-11-23 03:21:51,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 704 transitions. [2022-11-23 03:21:51,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:51,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 704 transitions. [2022-11-23 03:21:51,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 64.0) internal successors, (704), 11 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:51,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:51,818 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 135.0) internal successors, (1620), 12 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:51,818 INFO L175 Difference]: Start difference. First operand has 272 places, 882 transitions, 19403 flow. Second operand 11 states and 704 transitions. [2022-11-23 03:21:51,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 1171 transitions, 27653 flow [2022-11-23 03:21:54,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1171 transitions, 27129 flow, removed 262 selfloop flow, removed 0 redundant places. [2022-11-23 03:21:54,022 INFO L231 Difference]: Finished difference. Result has 288 places, 1026 transitions, 23660 flow [2022-11-23 03:21:54,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=18937, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23660, PETRI_PLACES=288, PETRI_TRANSITIONS=1026} [2022-11-23 03:21:54,023 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2022-11-23 03:21:54,023 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 1026 transitions, 23660 flow [2022-11-23 03:21:54,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 58.88235294117647) internal successors, (1001), 17 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:54,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:21:54,023 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:21:54,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 03:21:54,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 03:21:54,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:21:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:21:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 399601264, now seen corresponding path program 19 times [2022-11-23 03:21:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:21:54,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029255957] [2022-11-23 03:21:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:21:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:21:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:21:54,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029255957] [2022-11-23 03:21:54,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029255957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:21:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304998728] [2022-11-23 03:21:54,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:21:54,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:21:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:21:54,351 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:21:54,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 03:21:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:21:54,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:21:54,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:21:54,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:21:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:21:54,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304998728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:21:54,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:21:54,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-23 03:21:54,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828037834] [2022-11-23 03:21:54,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:21:54,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:21:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:21:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:21:54,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:21:54,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:21:54,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 1026 transitions, 23660 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:54,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:21:54,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:21:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:21:59,735 INFO L130 PetriNetUnfolder]: 3698/7325 cut-off events. [2022-11-23 03:21:59,735 INFO L131 PetriNetUnfolder]: For 263466/263466 co-relation queries the response was YES. [2022-11-23 03:21:59,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71145 conditions, 7325 events. 3698/7325 cut-off events. For 263466/263466 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 61053 event pairs, 51 based on Foata normal form. 34/7359 useless extension candidates. Maximal degree in co-relation 69449. Up to 1974 conditions per place. [2022-11-23 03:21:59,823 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 337 selfloop transitions, 1026 changer transitions 40/1403 dead transitions. [2022-11-23 03:21:59,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1403 transitions, 33200 flow [2022-11-23 03:21:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 03:21:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-23 03:21:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3044 transitions. [2022-11-23 03:21:59,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4601662887377173 [2022-11-23 03:21:59,829 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3044 transitions. [2022-11-23 03:21:59,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3044 transitions. [2022-11-23 03:21:59,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:21:59,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3044 transitions. [2022-11-23 03:21:59,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 62.12244897959184) internal successors, (3044), 49 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:59,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 135.0) internal successors, (6750), 50 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:59,845 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 135.0) internal successors, (6750), 50 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:21:59,845 INFO L175 Difference]: Start difference. First operand has 288 places, 1026 transitions, 23660 flow. Second operand 49 states and 3044 transitions. [2022-11-23 03:21:59,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1403 transitions, 33200 flow [2022-11-23 03:22:04,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1403 transitions, 32949 flow, removed 97 selfloop flow, removed 5 redundant places. [2022-11-23 03:22:04,443 INFO L231 Difference]: Finished difference. Result has 340 places, 1235 transitions, 31533 flow [2022-11-23 03:22:04,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=23491, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=842, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=31533, PETRI_PLACES=340, PETRI_TRANSITIONS=1235} [2022-11-23 03:22:04,444 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2022-11-23 03:22:04,444 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1235 transitions, 31533 flow [2022-11-23 03:22:04,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:04,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:22:04,444 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:22:04,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 03:22:04,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 03:22:04,645 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:22:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:22:04,645 INFO L85 PathProgramCache]: Analyzing trace with hash 430940784, now seen corresponding path program 20 times [2022-11-23 03:22:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:22:04,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363211611] [2022-11-23 03:22:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:22:04,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:22:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:22:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:04,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:22:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363211611] [2022-11-23 03:22:04,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363211611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:22:04,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602327649] [2022-11-23 03:22:04,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:22:04,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:22:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:22:04,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:22:04,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 03:22:04,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:22:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:22:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:22:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:22:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:04,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:05,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:05,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602327649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:22:05,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:22:05,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-23 03:22:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013216746] [2022-11-23 03:22:05,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 03:22:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:22:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 03:22:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:22:05,124 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:22:05,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1235 transitions, 31533 flow. Second operand has 19 states, 19 states have (on average 58.94736842105263) internal successors, (1120), 19 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:05,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:22:05,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:22:05,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:22:10,161 INFO L130 PetriNetUnfolder]: 3928/7636 cut-off events. [2022-11-23 03:22:10,161 INFO L131 PetriNetUnfolder]: For 334287/334287 co-relation queries the response was YES. [2022-11-23 03:22:10,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80652 conditions, 7636 events. 3928/7636 cut-off events. For 334287/334287 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 62526 event pairs, 313 based on Foata normal form. 104/7740 useless extension candidates. Maximal degree in co-relation 78868. Up to 5932 conditions per place. [2022-11-23 03:22:10,276 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 1100 selfloop transitions, 325 changer transitions 3/1428 dead transitions. [2022-11-23 03:22:10,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1428 transitions, 38390 flow [2022-11-23 03:22:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 03:22:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 03:22:10,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1071 transitions. [2022-11-23 03:22:10,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2022-11-23 03:22:10,278 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1071 transitions. [2022-11-23 03:22:10,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1071 transitions. [2022-11-23 03:22:10,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:22:10,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1071 transitions. [2022-11-23 03:22:10,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.0) internal successors, (1071), 17 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:10,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 135.0) internal successors, (2430), 18 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:10,284 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 135.0) internal successors, (2430), 18 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:10,285 INFO L175 Difference]: Start difference. First operand has 340 places, 1235 transitions, 31533 flow. Second operand 17 states and 1071 transitions. [2022-11-23 03:22:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1428 transitions, 38390 flow [2022-11-23 03:22:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1428 transitions, 34483 flow, removed 1548 selfloop flow, removed 15 redundant places. [2022-11-23 03:22:18,132 INFO L231 Difference]: Finished difference. Result has 340 places, 1316 transitions, 31295 flow [2022-11-23 03:22:18,133 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=28251, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=31295, PETRI_PLACES=340, PETRI_TRANSITIONS=1316} [2022-11-23 03:22:18,134 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2022-11-23 03:22:18,134 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1316 transitions, 31295 flow [2022-11-23 03:22:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.94736842105263) internal successors, (1120), 19 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:18,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:22:18,135 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:22:18,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 03:22:18,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 03:22:18,341 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:22:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:22:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash -587530510, now seen corresponding path program 21 times [2022-11-23 03:22:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:22:18,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592298501] [2022-11-23 03:22:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:22:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:22:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:22:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:18,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:22:18,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592298501] [2022-11-23 03:22:18,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592298501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:22:18,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664303459] [2022-11-23 03:22:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:22:18,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:22:18,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:22:18,491 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:22:18,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 03:22:18,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:22:18,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:22:18,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:22:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:22:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:18,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:18,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664303459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:22:18,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:22:18,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-23 03:22:18,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635780188] [2022-11-23 03:22:18,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:22:18,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:22:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:22:18,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:22:18,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:22:18,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1316 transitions, 31295 flow. Second operand has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:18,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:22:18,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:22:18,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:22:24,744 INFO L130 PetriNetUnfolder]: 4221/8180 cut-off events. [2022-11-23 03:22:24,744 INFO L131 PetriNetUnfolder]: For 287576/287576 co-relation queries the response was YES. [2022-11-23 03:22:24,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81056 conditions, 8180 events. 4221/8180 cut-off events. For 287576/287576 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 67707 event pairs, 261 based on Foata normal form. 52/8232 useless extension candidates. Maximal degree in co-relation 79238. Up to 5162 conditions per place. [2022-11-23 03:22:24,851 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 975 selfloop transitions, 533 changer transitions 17/1525 dead transitions. [2022-11-23 03:22:24,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1525 transitions, 38095 flow [2022-11-23 03:22:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 03:22:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 03:22:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1322 transitions. [2022-11-23 03:22:24,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46631393298059964 [2022-11-23 03:22:24,854 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1322 transitions. [2022-11-23 03:22:24,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1322 transitions. [2022-11-23 03:22:24,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:22:24,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1322 transitions. [2022-11-23 03:22:24,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 62.95238095238095) internal successors, (1322), 21 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:24,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:24,861 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 135.0) internal successors, (2970), 22 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:24,861 INFO L175 Difference]: Start difference. First operand has 340 places, 1316 transitions, 31295 flow. Second operand 21 states and 1322 transitions. [2022-11-23 03:22:24,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1525 transitions, 38095 flow [2022-11-23 03:22:31,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1525 transitions, 37659 flow, removed 124 selfloop flow, removed 5 redundant places. [2022-11-23 03:22:31,553 INFO L231 Difference]: Finished difference. Result has 358 places, 1389 transitions, 34438 flow [2022-11-23 03:22:31,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=30920, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=34438, PETRI_PLACES=358, PETRI_TRANSITIONS=1389} [2022-11-23 03:22:31,555 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 338 predicate places. [2022-11-23 03:22:31,555 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1389 transitions, 34438 flow [2022-11-23 03:22:31,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:31,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:22:31,556 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:22:31,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 03:22:31,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:22:31,761 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:22:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:22:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash -509155556, now seen corresponding path program 22 times [2022-11-23 03:22:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:22:31,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521518472] [2022-11-23 03:22:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:22:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:22:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:22:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:31,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:22:31,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521518472] [2022-11-23 03:22:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521518472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:22:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722545894] [2022-11-23 03:22:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:22:31,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:22:31,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:22:31,884 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:22:31,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 03:22:31,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:22:31,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:22:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:22:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:22:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:32,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722545894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:22:32,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:22:32,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-23 03:22:32,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841037753] [2022-11-23 03:22:32,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:32,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:22:32,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:22:32,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:22:32,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:22:32,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:22:32,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1389 transitions, 34438 flow. Second operand has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:32,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:22:32,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:22:32,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:22:38,462 INFO L130 PetriNetUnfolder]: 4406/8575 cut-off events. [2022-11-23 03:22:38,463 INFO L131 PetriNetUnfolder]: For 351917/351917 co-relation queries the response was YES. [2022-11-23 03:22:38,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86578 conditions, 8575 events. 4406/8575 cut-off events. For 351917/351917 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 71928 event pairs, 199 based on Foata normal form. 142/8717 useless extension candidates. Maximal degree in co-relation 84756. Up to 3504 conditions per place. [2022-11-23 03:22:38,595 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 719 selfloop transitions, 873 changer transitions 12/1604 dead transitions. [2022-11-23 03:22:38,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1604 transitions, 40932 flow [2022-11-23 03:22:38,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 03:22:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-23 03:22:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1884 transitions. [2022-11-23 03:22:38,600 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4651851851851852 [2022-11-23 03:22:38,600 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1884 transitions. [2022-11-23 03:22:38,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1884 transitions. [2022-11-23 03:22:38,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:22:38,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1884 transitions. [2022-11-23 03:22:38,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.8) internal successors, (1884), 30 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:38,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 135.0) internal successors, (4185), 31 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:38,609 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 135.0) internal successors, (4185), 31 states have internal predecessors, (4185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:38,610 INFO L175 Difference]: Start difference. First operand has 358 places, 1389 transitions, 34438 flow. Second operand 30 states and 1884 transitions. [2022-11-23 03:22:38,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1604 transitions, 40932 flow [2022-11-23 03:22:46,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1604 transitions, 40562 flow, removed 56 selfloop flow, removed 9 redundant places. [2022-11-23 03:22:46,255 INFO L231 Difference]: Finished difference. Result has 387 places, 1468 transitions, 38995 flow [2022-11-23 03:22:46,256 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=34000, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=796, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=38995, PETRI_PLACES=387, PETRI_TRANSITIONS=1468} [2022-11-23 03:22:46,257 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 367 predicate places. [2022-11-23 03:22:46,257 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1468 transitions, 38995 flow [2022-11-23 03:22:46,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.833333333333336) internal successors, (1059), 18 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:46,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:22:46,258 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:22:46,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-23 03:22:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 03:22:46,460 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:22:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:22:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash -459867912, now seen corresponding path program 23 times [2022-11-23 03:22:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:22:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899349680] [2022-11-23 03:22:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:22:46,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:22:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:22:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:46,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:22:46,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899349680] [2022-11-23 03:22:46,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899349680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:22:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850316919] [2022-11-23 03:22:46,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:22:46,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:22:46,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:22:46,583 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:22:46,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 03:22:46,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-23 03:22:46,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:22:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:22:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:22:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:46,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:22:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:22:46,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850316919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:22:46,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:22:46,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-11-23 03:22:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672148065] [2022-11-23 03:22:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:22:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:22:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:22:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:22:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:22:46,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:22:46,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1468 transitions, 38995 flow. Second operand has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:46,930 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:22:46,930 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:22:46,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:22:53,570 INFO L130 PetriNetUnfolder]: 4370/8509 cut-off events. [2022-11-23 03:22:53,570 INFO L131 PetriNetUnfolder]: For 382767/382767 co-relation queries the response was YES. [2022-11-23 03:22:53,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90633 conditions, 8509 events. 4370/8509 cut-off events. For 382767/382767 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 71339 event pairs, 105 based on Foata normal form. 60/8569 useless extension candidates. Maximal degree in co-relation 88838. Up to 2430 conditions per place. [2022-11-23 03:22:53,784 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 454 selfloop transitions, 1126 changer transitions 1/1581 dead transitions. [2022-11-23 03:22:53,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 1581 transitions, 43218 flow [2022-11-23 03:22:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 03:22:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-23 03:22:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2190 transitions. [2022-11-23 03:22:53,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4634920634920635 [2022-11-23 03:22:53,788 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2190 transitions. [2022-11-23 03:22:53,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2190 transitions. [2022-11-23 03:22:53,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:22:53,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2190 transitions. [2022-11-23 03:22:53,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 62.57142857142857) internal successors, (2190), 35 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:53,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 135.0) internal successors, (4860), 36 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:53,800 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 135.0) internal successors, (4860), 36 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:22:53,800 INFO L175 Difference]: Start difference. First operand has 387 places, 1468 transitions, 38995 flow. Second operand 35 states and 2190 transitions. [2022-11-23 03:22:53,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 1581 transitions, 43218 flow [2022-11-23 03:23:02,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1581 transitions, 42277 flow, removed 177 selfloop flow, removed 19 redundant places. [2022-11-23 03:23:02,997 INFO L231 Difference]: Finished difference. Result has 403 places, 1469 transitions, 41022 flow [2022-11-23 03:23:02,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=37898, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=41022, PETRI_PLACES=403, PETRI_TRANSITIONS=1469} [2022-11-23 03:23:02,999 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2022-11-23 03:23:03,000 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 1469 transitions, 41022 flow [2022-11-23 03:23:03,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.666666666666664) internal successors, (1056), 18 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:03,000 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:03,000 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:23:03,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:03,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:03,201 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:23:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1275912236, now seen corresponding path program 24 times [2022-11-23 03:23:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406396249] [2022-11-23 03:23:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:03,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406396249] [2022-11-23 03:23:03,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406396249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:23:03,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140285633] [2022-11-23 03:23:03,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:23:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:03,354 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:23:03,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 03:23:03,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:23:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:23:03,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:23:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:03,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:23:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:03,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140285633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:23:03,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:23:03,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-23 03:23:03,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084268438] [2022-11-23 03:23:03,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:23:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 03:23:03,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:23:03,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 03:23:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-23 03:23:03,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:23:03,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1469 transitions, 41022 flow. Second operand has 21 states, 21 states have (on average 58.857142857142854) internal successors, (1236), 21 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:03,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:03,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:23:03,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:12,866 INFO L130 PetriNetUnfolder]: 5123/9890 cut-off events. [2022-11-23 03:23:12,866 INFO L131 PetriNetUnfolder]: For 457169/457169 co-relation queries the response was YES. [2022-11-23 03:23:13,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109508 conditions, 9890 events. 5123/9890 cut-off events. For 457169/457169 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 84206 event pairs, 309 based on Foata normal form. 28/9918 useless extension candidates. Maximal degree in co-relation 107712. Up to 6804 conditions per place. [2022-11-23 03:23:13,058 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 1297 selfloop transitions, 597 changer transitions 4/1898 dead transitions. [2022-11-23 03:23:13,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1898 transitions, 54784 flow [2022-11-23 03:23:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 03:23:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-23 03:23:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1766 transitions. [2022-11-23 03:23:13,061 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4671957671957672 [2022-11-23 03:23:13,061 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1766 transitions. [2022-11-23 03:23:13,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1766 transitions. [2022-11-23 03:23:13,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:13,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1766 transitions. [2022-11-23 03:23:13,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 63.07142857142857) internal successors, (1766), 28 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:13,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 135.0) internal successors, (3915), 29 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:13,069 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 135.0) internal successors, (3915), 29 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:13,069 INFO L175 Difference]: Start difference. First operand has 403 places, 1469 transitions, 41022 flow. Second operand 28 states and 1766 transitions. [2022-11-23 03:23:13,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1898 transitions, 54784 flow [2022-11-23 03:23:23,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1898 transitions, 53346 flow, removed 116 selfloop flow, removed 26 redundant places. [2022-11-23 03:23:24,037 INFO L231 Difference]: Finished difference. Result has 409 places, 1691 transitions, 48469 flow [2022-11-23 03:23:24,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=39872, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=991, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=48469, PETRI_PLACES=409, PETRI_TRANSITIONS=1691} [2022-11-23 03:23:24,038 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 389 predicate places. [2022-11-23 03:23:24,038 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1691 transitions, 48469 flow [2022-11-23 03:23:24,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.857142857142854) internal successors, (1236), 21 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:24,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:24,039 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:23:24,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:24,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:24,240 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:23:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash 388331416, now seen corresponding path program 25 times [2022-11-23 03:23:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838328437] [2022-11-23 03:23:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838328437] [2022-11-23 03:23:24,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838328437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:23:24,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625289427] [2022-11-23 03:23:24,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:23:24,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:24,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:24,364 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:23:24,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 03:23:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:23:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:24,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:23:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:24,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625289427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:23:24,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:23:24,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-11-23 03:23:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530653436] [2022-11-23 03:23:24,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:23:24,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:23:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:23:24,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:23:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:23:24,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:23:24,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1691 transitions, 48469 flow. Second operand has 18 states, 18 states have (on average 58.888888888888886) internal successors, (1060), 18 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) [2022-11-23 03:23:24,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:24,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:23:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:23:34,125 INFO L130 PetriNetUnfolder]: 5659/10916 cut-off events. [2022-11-23 03:23:34,126 INFO L131 PetriNetUnfolder]: For 553358/553358 co-relation queries the response was YES. [2022-11-23 03:23:34,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121905 conditions, 10916 events. 5659/10916 cut-off events. For 553358/553358 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 94495 event pairs, 123 based on Foata normal form. 188/11104 useless extension candidates. Maximal degree in co-relation 120104. Up to 3198 conditions per place. [2022-11-23 03:23:34,387 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 584 selfloop transitions, 1424 changer transitions 20/2028 dead transitions. [2022-11-23 03:23:34,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 2028 transitions, 59925 flow [2022-11-23 03:23:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:23:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:23:34,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1693 transitions. [2022-11-23 03:23:34,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644718792866941 [2022-11-23 03:23:34,391 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1693 transitions. [2022-11-23 03:23:34,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1693 transitions. [2022-11-23 03:23:34,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:23:34,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1693 transitions. [2022-11-23 03:23:34,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.7037037037037) internal successors, (1693), 27 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:34,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 135.0) internal successors, (3780), 28 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:34,399 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 135.0) internal successors, (3780), 28 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:34,399 INFO L175 Difference]: Start difference. First operand has 409 places, 1691 transitions, 48469 flow. Second operand 27 states and 1693 transitions. [2022-11-23 03:23:34,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 2028 transitions, 59925 flow [2022-11-23 03:23:47,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 2028 transitions, 58303 flow, removed 299 selfloop flow, removed 9 redundant places. [2022-11-23 03:23:47,090 INFO L231 Difference]: Finished difference. Result has 431 places, 1868 transitions, 57110 flow [2022-11-23 03:23:47,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=46946, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=57110, PETRI_PLACES=431, PETRI_TRANSITIONS=1868} [2022-11-23 03:23:47,092 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 411 predicate places. [2022-11-23 03:23:47,093 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1868 transitions, 57110 flow [2022-11-23 03:23:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.888888888888886) internal successors, (1060), 18 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) [2022-11-23 03:23:47,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:23:47,093 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:23:47,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 03:23:47,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-23 03:23:47,298 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:23:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:23:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1985233998, now seen corresponding path program 26 times [2022-11-23 03:23:47,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:23:47,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756638046] [2022-11-23 03:23:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:23:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:23:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:23:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:47,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:23:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756638046] [2022-11-23 03:23:47,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756638046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:23:47,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905917868] [2022-11-23 03:23:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:23:47,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:23:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:23:47,419 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:23:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 03:23:47,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:23:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:23:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:23:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:23:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:47,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:23:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:23:47,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905917868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:23:47,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:23:47,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2022-11-23 03:23:47,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168846416] [2022-11-23 03:23:47,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:23:47,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 03:23:47,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:23:47,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 03:23:47,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-23 03:23:47,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:23:47,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1868 transitions, 57110 flow. Second operand has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:23:47,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:23:47,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:23:47,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:02,536 INFO L130 PetriNetUnfolder]: 7937/15181 cut-off events. [2022-11-23 03:24:02,536 INFO L131 PetriNetUnfolder]: For 823869/823869 co-relation queries the response was YES. [2022-11-23 03:24:02,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178938 conditions, 15181 events. 7937/15181 cut-off events. For 823869/823869 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 136122 event pairs, 219 based on Foata normal form. 256/15437 useless extension candidates. Maximal degree in co-relation 177098. Up to 4572 conditions per place. [2022-11-23 03:24:02,869 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 847 selfloop transitions, 1945 changer transitions 40/2832 dead transitions. [2022-11-23 03:24:02,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2832 transitions, 89080 flow [2022-11-23 03:24:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 03:24:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 03:24:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1952 transitions. [2022-11-23 03:24:02,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4664277180406213 [2022-11-23 03:24:02,872 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1952 transitions. [2022-11-23 03:24:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1952 transitions. [2022-11-23 03:24:02,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:02,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1952 transitions. [2022-11-23 03:24:02,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 62.96774193548387) internal successors, (1952), 31 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:02,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 135.0) internal successors, (4320), 32 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:02,878 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 135.0) internal successors, (4320), 32 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:02,878 INFO L175 Difference]: Start difference. First operand has 431 places, 1868 transitions, 57110 flow. Second operand 31 states and 1952 transitions. [2022-11-23 03:24:02,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2832 transitions, 89080 flow [2022-11-23 03:24:27,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 2832 transitions, 88164 flow, removed 328 selfloop flow, removed 12 redundant places. [2022-11-23 03:24:27,343 INFO L231 Difference]: Finished difference. Result has 461 places, 2599 transitions, 86388 flow [2022-11-23 03:24:27,344 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=56499, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=86388, PETRI_PLACES=461, PETRI_TRANSITIONS=2599} [2022-11-23 03:24:27,344 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 441 predicate places. [2022-11-23 03:24:27,344 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 2599 transitions, 86388 flow [2022-11-23 03:24:27,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.8421052631579) internal successors, (1118), 19 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:27,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:24:27,345 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:24:27,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 03:24:27,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-23 03:24:27,545 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:24:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:24:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash 443922556, now seen corresponding path program 27 times [2022-11-23 03:24:27,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:24:27,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457433311] [2022-11-23 03:24:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:24:27,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:24:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:24:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:24:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457433311] [2022-11-23 03:24:27,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457433311] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:24:27,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630231896] [2022-11-23 03:24:27,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:24:27,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:24:27,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:24:27,693 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:24:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 03:24:27,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:24:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:24:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:24:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:24:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:27,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:24:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:24:28,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630231896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:24:28,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:24:28,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-23 03:24:28,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877541614] [2022-11-23 03:24:28,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:24:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 03:24:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:24:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 03:24:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-11-23 03:24:28,115 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:24:28,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 2599 transitions, 86388 flow. Second operand has 25 states, 25 states have (on average 58.48) internal successors, (1462), 25 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:28,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:24:28,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:24:28,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:24:47,256 INFO L130 PetriNetUnfolder]: 8075/15441 cut-off events. [2022-11-23 03:24:47,256 INFO L131 PetriNetUnfolder]: For 870973/870973 co-relation queries the response was YES. [2022-11-23 03:24:47,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192287 conditions, 15441 events. 8075/15441 cut-off events. For 870973/870973 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 138603 event pairs, 2744 based on Foata normal form. 136/15577 useless extension candidates. Maximal degree in co-relation 189500. Up to 13645 conditions per place. [2022-11-23 03:24:47,638 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 2480 selfloop transitions, 320 changer transitions 43/2843 dead transitions. [2022-11-23 03:24:47,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2843 transitions, 95575 flow [2022-11-23 03:24:47,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 03:24:47,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 03:24:47,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1970 transitions. [2022-11-23 03:24:47,641 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47072879330943845 [2022-11-23 03:24:47,642 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1970 transitions. [2022-11-23 03:24:47,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1970 transitions. [2022-11-23 03:24:47,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:24:47,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1970 transitions. [2022-11-23 03:24:47,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 63.54838709677419) internal successors, (1970), 31 states have internal predecessors, (1970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:47,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 135.0) internal successors, (4320), 32 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:47,650 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 135.0) internal successors, (4320), 32 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:24:47,650 INFO L175 Difference]: Start difference. First operand has 461 places, 2599 transitions, 86388 flow. Second operand 31 states and 1970 transitions. [2022-11-23 03:24:47,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2843 transitions, 95575 flow [2022-11-23 03:25:18,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 2843 transitions, 93972 flow, removed 696 selfloop flow, removed 12 redundant places. [2022-11-23 03:25:19,037 INFO L231 Difference]: Finished difference. Result has 491 places, 2680 transitions, 87721 flow [2022-11-23 03:25:19,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=84785, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=87721, PETRI_PLACES=491, PETRI_TRANSITIONS=2680} [2022-11-23 03:25:19,039 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 471 predicate places. [2022-11-23 03:25:19,039 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 2680 transitions, 87721 flow [2022-11-23 03:25:19,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 58.48) internal successors, (1462), 25 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:19,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:25:19,040 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:25:19,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 03:25:19,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 03:25:19,240 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:25:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:25:19,241 INFO L85 PathProgramCache]: Analyzing trace with hash 593898240, now seen corresponding path program 28 times [2022-11-23 03:25:19,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:25:19,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058394224] [2022-11-23 03:25:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:25:19,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:25:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:25:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:25:19,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:25:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058394224] [2022-11-23 03:25:19,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058394224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:25:19,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855708201] [2022-11-23 03:25:19,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:25:19,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:25:19,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:25:19,367 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:25:19,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 03:25:19,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:25:19,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:25:19,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 03:25:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:25:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:25:19,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:25:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:25:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855708201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:25:19,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:25:19,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2022-11-23 03:25:19,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487249019] [2022-11-23 03:25:19,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:25:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 03:25:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:25:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 03:25:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-23 03:25:19,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 135 [2022-11-23 03:25:19,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 2680 transitions, 87721 flow. Second operand has 21 states, 21 states have (on average 58.666666666666664) internal successors, (1232), 21 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:19,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:25:19,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 135 [2022-11-23 03:25:19,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:25:41,564 INFO L130 PetriNetUnfolder]: 8136/15554 cut-off events. [2022-11-23 03:25:41,564 INFO L131 PetriNetUnfolder]: For 857959/857959 co-relation queries the response was YES. [2022-11-23 03:25:41,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193893 conditions, 15554 events. 8136/15554 cut-off events. For 857959/857959 co-relation queries the response was YES. Maximal size of possible extension queue 1277. Compared 139836 event pairs, 943 based on Foata normal form. 6/15560 useless extension candidates. Maximal degree in co-relation 190496. Up to 5364 conditions per place. [2022-11-23 03:25:41,963 INFO L137 encePairwiseOnDemand]: 129/135 looper letters, 1657 selfloop transitions, 1170 changer transitions 19/2846 dead transitions. [2022-11-23 03:25:41,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 2846 transitions, 95915 flow [2022-11-23 03:25:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 03:25:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-23 03:25:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2273 transitions. [2022-11-23 03:25:41,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45505505505505506 [2022-11-23 03:25:41,966 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2273 transitions. [2022-11-23 03:25:41,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2273 transitions. [2022-11-23 03:25:41,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:25:41,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2273 transitions. [2022-11-23 03:25:41,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 61.432432432432435) internal successors, (2273), 37 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 135.0) internal successors, (5130), 38 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,975 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 135.0) internal successors, (5130), 38 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:25:41,975 INFO L175 Difference]: Start difference. First operand has 491 places, 2680 transitions, 87721 flow. Second operand 37 states and 2273 transitions. [2022-11-23 03:25:41,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 2846 transitions, 95915 flow [2022-11-23 03:26:13,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2846 transitions, 93568 flow, removed 688 selfloop flow, removed 8 redundant places. [2022-11-23 03:26:13,099 INFO L231 Difference]: Finished difference. Result has 523 places, 2751 transitions, 89523 flow [2022-11-23 03:26:13,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=85634, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=89523, PETRI_PLACES=523, PETRI_TRANSITIONS=2751} [2022-11-23 03:26:13,101 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 503 predicate places. [2022-11-23 03:26:13,101 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 2751 transitions, 89523 flow [2022-11-23 03:26:13,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 58.666666666666664) internal successors, (1232), 21 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:13,101 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:26:13,101 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:26:13,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-23 03:26:13,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 03:26:13,302 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:26:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:26:13,302 INFO L85 PathProgramCache]: Analyzing trace with hash 165180901, now seen corresponding path program 29 times [2022-11-23 03:26:13,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:26:13,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695169725] [2022-11-23 03:26:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:26:13,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:26:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:26:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:26:13,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:26:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695169725] [2022-11-23 03:26:13,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695169725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:26:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728152757] [2022-11-23 03:26:13,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:26:13,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:26:13,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:26:13,490 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:26:13,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3badc1e9-30fc-4b2f-b7f0-cd47c4379d21/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 03:26:13,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-23 03:26:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:26:13,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 03:26:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:26:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:26:13,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:26:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:26:13,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728152757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:26:13,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:26:13,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-23 03:26:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372362987] [2022-11-23 03:26:13,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:26:13,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 03:26:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:26:13,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 03:26:13,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:26:13,706 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 135 [2022-11-23 03:26:13,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 2751 transitions, 89523 flow. Second operand has 7 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:13,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:26:13,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 135 [2022-11-23 03:26:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:26:38,839 INFO L130 PetriNetUnfolder]: 11518/21879 cut-off events. [2022-11-23 03:26:38,839 INFO L131 PetriNetUnfolder]: For 1284652/1284663 co-relation queries the response was YES. [2022-11-23 03:26:39,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275843 conditions, 21879 events. 11518/21879 cut-off events. For 1284652/1284663 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 205982 event pairs, 792 based on Foata normal form. 40/21917 useless extension candidates. Maximal degree in co-relation 271335. Up to 11820 conditions per place. [2022-11-23 03:26:39,464 INFO L137 encePairwiseOnDemand]: 131/135 looper letters, 2207 selfloop transitions, 1645 changer transitions 235/4096 dead transitions. [2022-11-23 03:26:39,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 4096 transitions, 137064 flow [2022-11-23 03:26:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:26:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:26:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 530 transitions. [2022-11-23 03:26:39,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2022-11-23 03:26:39,472 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 530 transitions. [2022-11-23 03:26:39,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 530 transitions. [2022-11-23 03:26:39,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:26:39,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 530 transitions. [2022-11-23 03:26:39,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 75.71428571428571) internal successors, (530), 7 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:39,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:39,475 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:26:39,475 INFO L175 Difference]: Start difference. First operand has 523 places, 2751 transitions, 89523 flow. Second operand 7 states and 530 transitions. [2022-11-23 03:26:39,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 4096 transitions, 137064 flow