./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/clever.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/clever.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:40:37,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:40:37,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:40:37,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:40:37,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:40:37,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:40:37,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:40:37,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:40:37,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:40:37,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:40:37,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:40:37,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:40:37,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:40:37,231 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:40:37,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:40:37,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:40:37,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:40:37,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:40:37,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:40:37,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:40:37,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:40:37,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:40:37,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:40:37,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:40:37,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:40:37,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:40:37,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:40:37,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:40:37,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:40:37,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:40:37,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:40:37,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:40:37,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:40:37,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:40:37,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:40:37,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:40:37,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:40:37,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:40:37,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:40:37,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:40:37,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:40:37,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:40:37,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:40:37,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:40:37,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:40:37,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:40:37,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:40:37,333 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:40:37,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:40:37,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:40:37,335 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:40:37,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:40:37,337 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:40:37,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:40:37,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:40:37,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:40:37,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:40:37,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:40:37,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:40:37,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:40:37,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:40:37,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:40:37,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:40:37,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:40:37,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:40:37,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:40:37,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:40:37,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:40:37,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:40:37,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:40:37,342 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:40:37,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:40:37,343 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:40:37,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:40:37,344 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:40:37,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:40:37,345 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_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93a2fdd4bcf1d0c2ab8b4e49feeb28ec4b1782148939310f1cb0ffe97948195e [2022-11-25 17:40:37,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:40:37,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:40:37,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:40:37,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:40:37,749 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:40:37,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/clever.wvr.c [2022-11-25 17:40:41,054 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:40:41,304 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:40:41,305 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/sv-benchmarks/c/weaver/clever.wvr.c [2022-11-25 17:40:41,313 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/data/25968cb19/97885263ae6f4b0992cd5d7e4238c54c/FLAGe42c848ae [2022-11-25 17:40:41,332 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/data/25968cb19/97885263ae6f4b0992cd5d7e4238c54c [2022-11-25 17:40:41,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:40:41,337 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:40:41,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:40:41,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:40:41,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:40:41,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50636c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41, skipping insertion in model container [2022-11-25 17:40:41,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:40:41,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:40:41,603 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_402fd49f-14be-4450-9c69-3429f68c0724/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2022-11-25 17:40:41,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:40:41,624 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:40:41,647 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_402fd49f-14be-4450-9c69-3429f68c0724/sv-benchmarks/c/weaver/clever.wvr.c[2133,2146] [2022-11-25 17:40:41,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:40:41,665 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:40:41,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41 WrapperNode [2022-11-25 17:40:41,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:40:41,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:40:41,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:40:41,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:40:41,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,723 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2022-11-25 17:40:41,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:40:41,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:40:41,725 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:40:41,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:40:41,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:40:41,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:40:41,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:40:41,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:40:41,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (1/1) ... [2022-11-25 17:40:41,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:40:41,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:41,811 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:40:41,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:40:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:40:41,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:40:41,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:40:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:40:41,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:40:41,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:40:41,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:40:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:40:41,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:40:41,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:40:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:40:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:40:41,874 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:40:42,035 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:40:42,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:40:42,400 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:40:42,409 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:40:42,410 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:40:42,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:40:42 BoogieIcfgContainer [2022-11-25 17:40:42,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:40:42,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:40:42,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:40:42,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:40:42,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:40:41" (1/3) ... [2022-11-25 17:40:42,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7367eccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:40:42, skipping insertion in model container [2022-11-25 17:40:42,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:41" (2/3) ... [2022-11-25 17:40:42,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7367eccb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:40:42, skipping insertion in model container [2022-11-25 17:40:42,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:40:42" (3/3) ... [2022-11-25 17:40:42,421 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2022-11-25 17:40:42,431 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:40:42,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:40:42,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:40:42,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:40:42,505 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:40:42,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 258 flow [2022-11-25 17:40:42,620 INFO L130 PetriNetUnfolder]: 9/119 cut-off events. [2022-11-25 17:40:42,620 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:40:42,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 119 events. 9/119 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-25 17:40:42,627 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 121 transitions, 258 flow [2022-11-25 17:40:42,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 110 transitions, 232 flow [2022-11-25 17:40:42,637 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:40:42,658 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 110 transitions, 232 flow [2022-11-25 17:40:42,662 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 110 transitions, 232 flow [2022-11-25 17:40:42,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 110 transitions, 232 flow [2022-11-25 17:40:42,707 INFO L130 PetriNetUnfolder]: 9/110 cut-off events. [2022-11-25 17:40:42,707 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:40:42,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 110 events. 9/110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-25 17:40:42,710 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2022-11-25 17:40:47,933 INFO L134 LiptonReduction]: Checked pairs total: 744 [2022-11-25 17:40:47,933 INFO L136 LiptonReduction]: Total number of compositions: 107 [2022-11-25 17:40:47,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:40:47,960 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;@12d13eb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:40:47,960 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:40:47,966 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2022-11-25 17:40:47,966 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:40:47,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:47,967 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:47,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:47,974 INFO L85 PathProgramCache]: Analyzing trace with hash 258614527, now seen corresponding path program 1 times [2022-11-25 17:40:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:47,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942625856] [2022-11-25 17:40:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:48,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:48,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942625856] [2022-11-25 17:40:48,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942625856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:48,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:48,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:40:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705921019] [2022-11-25 17:40:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:48,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:40:48,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:40:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:40:48,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 228 [2022-11-25 17:40:48,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:48,747 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:48,747 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 228 [2022-11-25 17:40:48,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:48,882 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2022-11-25 17:40:48,882 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-11-25 17:40:48,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 117 events. 69/117 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 277 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2022-11-25 17:40:48,890 INFO L137 encePairwiseOnDemand]: 224/228 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2022-11-25 17:40:48,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 27 transitions, 129 flow [2022-11-25 17:40:48,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:40:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:40:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2022-11-25 17:40:48,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49707602339181284 [2022-11-25 17:40:48,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2022-11-25 17:40:48,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2022-11-25 17:40:48,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:48,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2022-11-25 17:40:48,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:48,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:48,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:48,954 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 340 transitions. [2022-11-25 17:40:48,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 27 transitions, 129 flow [2022-11-25 17:40:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:40:48,962 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2022-11-25 17:40:48,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2022-11-25 17:40:48,972 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2022-11-25 17:40:48,972 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2022-11-25 17:40:48,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:48,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:48,974 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:40:48,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:48,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1846481142, now seen corresponding path program 1 times [2022-11-25 17:40:48,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259771109] [2022-11-25 17:40:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:48,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:49,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259771109] [2022-11-25 17:40:49,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259771109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:49,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:49,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:40:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589445787] [2022-11-25 17:40:49,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:49,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:40:49,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:49,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:40:49,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:40:49,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2022-11-25 17:40:49,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:49,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2022-11-25 17:40:49,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:49,454 INFO L130 PetriNetUnfolder]: 121/217 cut-off events. [2022-11-25 17:40:49,455 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-11-25 17:40:49,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 217 events. 121/217 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 678 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 201. Up to 130 conditions per place. [2022-11-25 17:40:49,461 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2022-11-25 17:40:49,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 49 transitions, 243 flow [2022-11-25 17:40:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:40:49,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:40:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2022-11-25 17:40:49,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4780701754385965 [2022-11-25 17:40:49,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2022-11-25 17:40:49,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2022-11-25 17:40:49,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:49,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2022-11-25 17:40:49,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,477 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,477 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 545 transitions. [2022-11-25 17:40:49,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 49 transitions, 243 flow [2022-11-25 17:40:49,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 49 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:40:49,480 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 99 flow [2022-11-25 17:40:49,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2022-11-25 17:40:49,482 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2022-11-25 17:40:49,482 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 99 flow [2022-11-25 17:40:49,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:49,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:40:49,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash -996386082, now seen corresponding path program 2 times [2022-11-25 17:40:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:49,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638366059] [2022-11-25 17:40:49,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:49,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:49,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638366059] [2022-11-25 17:40:49,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638366059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:49,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:49,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:40:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060673499] [2022-11-25 17:40:49,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:49,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:40:49,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:40:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:40:49,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 228 [2022-11-25 17:40:49,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:49,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 228 [2022-11-25 17:40:49,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:49,870 INFO L130 PetriNetUnfolder]: 110/185 cut-off events. [2022-11-25 17:40:49,875 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-25 17:40:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 185 events. 110/185 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 519 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 190. Up to 128 conditions per place. [2022-11-25 17:40:49,879 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2022-11-25 17:40:49,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 247 flow [2022-11-25 17:40:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:40:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:40:49,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 539 transitions. [2022-11-25 17:40:49,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4728070175438597 [2022-11-25 17:40:49,884 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 539 transitions. [2022-11-25 17:40:49,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 539 transitions. [2022-11-25 17:40:49,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:49,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 539 transitions. [2022-11-25 17:40:49,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,891 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,892 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 99 flow. Second operand 5 states and 539 transitions. [2022-11-25 17:40:49,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 247 flow [2022-11-25 17:40:49,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:40:49,896 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 127 flow [2022-11-25 17:40:49,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2022-11-25 17:40:49,898 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2022-11-25 17:40:49,898 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 127 flow [2022-11-25 17:40:49,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 4 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:49,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:49,900 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:40:49,901 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash 110904030, now seen corresponding path program 1 times [2022-11-25 17:40:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143391079] [2022-11-25 17:40:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:40:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143391079] [2022-11-25 17:40:50,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143391079] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580859851] [2022-11-25 17:40:50,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:50,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:50,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:50,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:40:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:50,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:40:50,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:40:50,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:40:50,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580859851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:50,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:40:50,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2022-11-25 17:40:50,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067084481] [2022-11-25 17:40:50,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:40:50,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:50,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:40:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:40:50,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:40:50,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 101.85714285714286) internal successors, (713), 7 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:50,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:40:50,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:40:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:40:50,657 INFO L130 PetriNetUnfolder]: 108/175 cut-off events. [2022-11-25 17:40:50,657 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2022-11-25 17:40:50,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 460 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 289. Up to 91 conditions per place. [2022-11-25 17:40:50,660 INFO L137 encePairwiseOnDemand]: 223/228 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2022-11-25 17:40:50,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 264 flow [2022-11-25 17:40:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:40:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:40:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 525 transitions. [2022-11-25 17:40:50,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2022-11-25 17:40:50,665 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 525 transitions. [2022-11-25 17:40:50,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 525 transitions. [2022-11-25 17:40:50,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:40:50,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 525 transitions. [2022-11-25 17:40:50,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.0) internal successors, (525), 5 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:50,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:50,672 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:50,672 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 127 flow. Second operand 5 states and 525 transitions. [2022-11-25 17:40:50,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 264 flow [2022-11-25 17:40:50,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 252 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:40:50,676 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 144 flow [2022-11-25 17:40:50,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2022-11-25 17:40:50,678 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2022-11-25 17:40:50,678 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 144 flow [2022-11-25 17:40:50,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 101.85714285714286) internal successors, (713), 7 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:40:50,679 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:40:50,679 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:50,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:50,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:50,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:40:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1000229081, now seen corresponding path program 1 times [2022-11-25 17:40:50,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:50,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002238747] [2022-11-25 17:40:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:51,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:51,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002238747] [2022-11-25 17:40:51,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002238747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:51,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917619712] [2022-11-25 17:40:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:51,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:51,485 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:51,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:40:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:40:51,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:58,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:58,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:40:58,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917619712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:58,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:40:58,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-25 17:40:58,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619146459] [2022-11-25 17:40:58,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:58,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:40:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:58,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:40:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=108, Unknown=3, NotChecked=0, Total=156 [2022-11-25 17:41:00,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:03,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:05,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:07,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:09,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:11,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:13,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:15,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:18,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:18,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2022-11-25 17:41:18,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:18,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:18,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2022-11-25 17:41:18,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:19,714 INFO L130 PetriNetUnfolder]: 260/427 cut-off events. [2022-11-25 17:41:19,714 INFO L131 PetriNetUnfolder]: For 526/526 co-relation queries the response was YES. [2022-11-25 17:41:19,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 427 events. 260/427 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1521 event pairs, 18 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 598. Up to 221 conditions per place. [2022-11-25 17:41:19,718 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 55 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2022-11-25 17:41:19,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 89 transitions, 618 flow [2022-11-25 17:41:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:41:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 17:41:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 935 transitions. [2022-11-25 17:41:19,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4100877192982456 [2022-11-25 17:41:19,723 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 935 transitions. [2022-11-25 17:41:19,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 935 transitions. [2022-11-25 17:41:19,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:19,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 935 transitions. [2022-11-25 17:41:19,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.5) internal successors, (935), 10 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:19,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:19,732 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:19,732 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 144 flow. Second operand 10 states and 935 transitions. [2022-11-25 17:41:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 89 transitions, 618 flow [2022-11-25 17:41:19,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 89 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:41:19,738 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 307 flow [2022-11-25 17:41:19,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2022-11-25 17:41:19,739 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2022-11-25 17:41:19,739 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 307 flow [2022-11-25 17:41:19,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.0) internal successors, (1144), 13 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:19,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:19,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:19,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:19,952 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:19,953 INFO L85 PathProgramCache]: Analyzing trace with hash 669372135, now seen corresponding path program 2 times [2022-11-25 17:41:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120217062] [2022-11-25 17:41:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:19,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120217062] [2022-11-25 17:41:20,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120217062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350339391] [2022-11-25 17:41:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:41:20,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:20,617 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:20,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:41:20,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:41:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:41:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:21,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350339391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:21,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:21,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-25 17:41:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047339430] [2022-11-25 17:41:21,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:41:21,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:41:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:41:22,418 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 228 [2022-11-25 17:41:22,420 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 95.84615384615384) internal successors, (1246), 13 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:22,421 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:22,421 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 228 [2022-11-25 17:41:22,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:24,221 INFO L130 PetriNetUnfolder]: 612/1001 cut-off events. [2022-11-25 17:41:24,221 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2022-11-25 17:41:24,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1001 events. 612/1001 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4387 event pairs, 30 based on Foata normal form. 7/1008 useless extension candidates. Maximal degree in co-relation 4336. Up to 537 conditions per place. [2022-11-25 17:41:24,231 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 99 selfloop transitions, 59 changer transitions 7/165 dead transitions. [2022-11-25 17:41:24,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 165 transitions, 1402 flow [2022-11-25 17:41:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:41:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:41:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1527 transitions. [2022-11-25 17:41:24,237 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44649122807017544 [2022-11-25 17:41:24,237 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1527 transitions. [2022-11-25 17:41:24,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1527 transitions. [2022-11-25 17:41:24,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:24,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1527 transitions. [2022-11-25 17:41:24,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 101.8) internal successors, (1527), 15 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:24,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:24,248 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:24,249 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 307 flow. Second operand 15 states and 1527 transitions. [2022-11-25 17:41:24,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 165 transitions, 1402 flow [2022-11-25 17:41:24,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 165 transitions, 1259 flow, removed 68 selfloop flow, removed 4 redundant places. [2022-11-25 17:41:24,260 INFO L231 Difference]: Finished difference. Result has 60 places, 86 transitions, 847 flow [2022-11-25 17:41:24,261 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=847, PETRI_PLACES=60, PETRI_TRANSITIONS=86} [2022-11-25 17:41:24,261 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2022-11-25 17:41:24,262 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 86 transitions, 847 flow [2022-11-25 17:41:24,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.84615384615384) internal successors, (1246), 13 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:24,263 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:24,263 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:24,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:24,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash -923456321, now seen corresponding path program 3 times [2022-11-25 17:41:24,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:24,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76916576] [2022-11-25 17:41:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:24,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:24,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:24,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76916576] [2022-11-25 17:41:24,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76916576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:24,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667805829] [2022-11-25 17:41:24,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:41:24,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:24,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:25,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:25,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:41:25,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:41:25,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:41:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:25,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667805829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:25,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:25,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-25 17:41:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664937459] [2022-11-25 17:41:25,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:41:25,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:41:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:41:26,634 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 228 [2022-11-25 17:41:26,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 86 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 95.84615384615384) internal successors, (1246), 13 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:26,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:26,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 228 [2022-11-25 17:41:26,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:28,364 INFO L130 PetriNetUnfolder]: 1110/1811 cut-off events. [2022-11-25 17:41:28,365 INFO L131 PetriNetUnfolder]: For 7333/7333 co-relation queries the response was YES. [2022-11-25 17:41:28,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9242 conditions, 1811 events. 1110/1811 cut-off events. For 7333/7333 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8836 event pairs, 170 based on Foata normal form. 4/1815 useless extension candidates. Maximal degree in co-relation 7167. Up to 985 conditions per place. [2022-11-25 17:41:28,385 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 109 selfloop transitions, 87 changer transitions 5/201 dead transitions. [2022-11-25 17:41:28,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 201 transitions, 2185 flow [2022-11-25 17:41:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:41:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:41:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1303 transitions. [2022-11-25 17:41:28,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43960863697705804 [2022-11-25 17:41:28,390 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1303 transitions. [2022-11-25 17:41:28,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1303 transitions. [2022-11-25 17:41:28,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:28,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1303 transitions. [2022-11-25 17:41:28,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 100.23076923076923) internal successors, (1303), 13 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:28,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 228.0) internal successors, (3192), 14 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:28,404 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 228.0) internal successors, (3192), 14 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:28,404 INFO L175 Difference]: Start difference. First operand has 60 places, 86 transitions, 847 flow. Second operand 13 states and 1303 transitions. [2022-11-25 17:41:28,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 201 transitions, 2185 flow [2022-11-25 17:41:28,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 201 transitions, 2001 flow, removed 89 selfloop flow, removed 2 redundant places. [2022-11-25 17:41:28,437 INFO L231 Difference]: Finished difference. Result has 75 places, 135 transitions, 1541 flow [2022-11-25 17:41:28,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1541, PETRI_PLACES=75, PETRI_TRANSITIONS=135} [2022-11-25 17:41:28,438 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 56 predicate places. [2022-11-25 17:41:28,439 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 135 transitions, 1541 flow [2022-11-25 17:41:28,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 95.84615384615384) internal successors, (1246), 13 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:28,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:28,440 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:28,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:28,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:28,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:28,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:28,647 INFO L85 PathProgramCache]: Analyzing trace with hash -433417154, now seen corresponding path program 1 times [2022-11-25 17:41:28,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:28,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407769080] [2022-11-25 17:41:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:28,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:28,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407769080] [2022-11-25 17:41:28,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407769080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:28,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96452169] [2022-11-25 17:41:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:28,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:28,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:28,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:28,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:41:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:41:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:28,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:29,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96452169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:29,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:29,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 17:41:29,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441213739] [2022-11-25 17:41:29,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:29,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:41:29,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:41:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:41:29,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:41:29,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 135 transitions, 1541 flow. Second operand has 10 states, 10 states have (on average 100.8) internal successors, (1008), 10 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:29,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:29,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:41:29,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:30,322 INFO L130 PetriNetUnfolder]: 2051/3425 cut-off events. [2022-11-25 17:41:30,323 INFO L131 PetriNetUnfolder]: For 20687/20687 co-relation queries the response was YES. [2022-11-25 17:41:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18887 conditions, 3425 events. 2051/3425 cut-off events. For 20687/20687 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19824 event pairs, 67 based on Foata normal form. 64/3489 useless extension candidates. Maximal degree in co-relation 17399. Up to 1829 conditions per place. [2022-11-25 17:41:30,365 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 327 selfloop transitions, 105 changer transitions 5/437 dead transitions. [2022-11-25 17:41:30,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 437 transitions, 5555 flow [2022-11-25 17:41:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:41:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:41:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1265 transitions. [2022-11-25 17:41:30,370 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46235380116959063 [2022-11-25 17:41:30,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1265 transitions. [2022-11-25 17:41:30,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1265 transitions. [2022-11-25 17:41:30,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:30,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1265 transitions. [2022-11-25 17:41:30,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.41666666666667) internal successors, (1265), 12 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:30,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 228.0) internal successors, (2964), 13 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:30,382 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 228.0) internal successors, (2964), 13 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:30,382 INFO L175 Difference]: Start difference. First operand has 75 places, 135 transitions, 1541 flow. Second operand 12 states and 1265 transitions. [2022-11-25 17:41:30,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 437 transitions, 5555 flow [2022-11-25 17:41:30,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 437 transitions, 5364 flow, removed 81 selfloop flow, removed 4 redundant places. [2022-11-25 17:41:30,441 INFO L231 Difference]: Finished difference. Result has 90 places, 221 transitions, 3116 flow [2022-11-25 17:41:30,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3116, PETRI_PLACES=90, PETRI_TRANSITIONS=221} [2022-11-25 17:41:30,446 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 71 predicate places. [2022-11-25 17:41:30,446 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 221 transitions, 3116 flow [2022-11-25 17:41:30,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.8) internal successors, (1008), 10 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:30,447 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:30,447 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:30,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:30,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 17:41:30,657 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:30,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1101064926, now seen corresponding path program 2 times [2022-11-25 17:41:30,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:30,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969865594] [2022-11-25 17:41:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:30,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:30,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969865594] [2022-11-25 17:41:30,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969865594] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:30,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045557933] [2022-11-25 17:41:30,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:41:30,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:30,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:30,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:41:30,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:41:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:30,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:41:30,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:31,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:31,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045557933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:31,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:31,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-25 17:41:31,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38688332] [2022-11-25 17:41:31,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:41:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:31,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:41:31,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:41:31,223 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:41:31,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 221 transitions, 3116 flow. Second operand has 9 states, 9 states have (on average 101.22222222222223) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:31,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:31,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:41:31,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:32,716 INFO L130 PetriNetUnfolder]: 2289/4040 cut-off events. [2022-11-25 17:41:32,716 INFO L131 PetriNetUnfolder]: For 35668/35668 co-relation queries the response was YES. [2022-11-25 17:41:32,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26365 conditions, 4040 events. 2289/4040 cut-off events. For 35668/35668 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25922 event pairs, 190 based on Foata normal form. 32/4072 useless extension candidates. Maximal degree in co-relation 23555. Up to 2007 conditions per place. [2022-11-25 17:41:32,865 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 251 selfloop transitions, 188 changer transitions 0/439 dead transitions. [2022-11-25 17:41:32,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 439 transitions, 6692 flow [2022-11-25 17:41:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:41:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:41:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1469 transitions. [2022-11-25 17:41:32,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46021303258145363 [2022-11-25 17:41:32,871 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1469 transitions. [2022-11-25 17:41:32,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1469 transitions. [2022-11-25 17:41:32,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:32,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1469 transitions. [2022-11-25 17:41:32,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.92857142857143) internal successors, (1469), 14 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:32,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:32,882 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:32,882 INFO L175 Difference]: Start difference. First operand has 90 places, 221 transitions, 3116 flow. Second operand 14 states and 1469 transitions. [2022-11-25 17:41:32,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 439 transitions, 6692 flow [2022-11-25 17:41:32,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 439 transitions, 6247 flow, removed 219 selfloop flow, removed 1 redundant places. [2022-11-25 17:41:33,004 INFO L231 Difference]: Finished difference. Result has 110 places, 290 transitions, 4614 flow [2022-11-25 17:41:33,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4614, PETRI_PLACES=110, PETRI_TRANSITIONS=290} [2022-11-25 17:41:33,005 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 91 predicate places. [2022-11-25 17:41:33,005 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 290 transitions, 4614 flow [2022-11-25 17:41:33,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.22222222222223) internal successors, (911), 9 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:33,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:33,006 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:33,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 17:41:33,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:33,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:33,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1759289497, now seen corresponding path program 3 times [2022-11-25 17:41:33,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:33,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477431539] [2022-11-25 17:41:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:33,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:33,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477431539] [2022-11-25 17:41:33,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477431539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:33,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173490122] [2022-11-25 17:41:33,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:41:33,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:33,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:33,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:33,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:41:34,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:41:34,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:41:34,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:34,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173490122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:35,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:35,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 17:41:35,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771299685] [2022-11-25 17:41:35,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:35,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:41:35,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:35,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:41:35,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:41:36,835 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 228 [2022-11-25 17:41:36,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 290 transitions, 4614 flow. Second operand has 19 states, 19 states have (on average 95.36842105263158) internal successors, (1812), 19 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:36,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:36,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 228 [2022-11-25 17:41:36,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:42,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:45,271 INFO L130 PetriNetUnfolder]: 3097/5428 cut-off events. [2022-11-25 17:41:45,271 INFO L131 PetriNetUnfolder]: For 60487/60487 co-relation queries the response was YES. [2022-11-25 17:41:45,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37901 conditions, 5428 events. 3097/5428 cut-off events. For 60487/60487 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36617 event pairs, 160 based on Foata normal form. 13/5441 useless extension candidates. Maximal degree in co-relation 34916. Up to 2529 conditions per place. [2022-11-25 17:41:45,356 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 327 selfloop transitions, 303 changer transitions 19/649 dead transitions. [2022-11-25 17:41:45,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 649 transitions, 11131 flow [2022-11-25 17:41:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:41:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:41:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2509 transitions. [2022-11-25 17:41:45,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4401754385964912 [2022-11-25 17:41:45,364 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2509 transitions. [2022-11-25 17:41:45,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2509 transitions. [2022-11-25 17:41:45,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:45,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2509 transitions. [2022-11-25 17:41:45,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 100.36) internal successors, (2509), 25 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:45,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:45,387 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:45,387 INFO L175 Difference]: Start difference. First operand has 110 places, 290 transitions, 4614 flow. Second operand 25 states and 2509 transitions. [2022-11-25 17:41:45,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 649 transitions, 11131 flow [2022-11-25 17:41:45,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 649 transitions, 10189 flow, removed 462 selfloop flow, removed 3 redundant places. [2022-11-25 17:41:45,730 INFO L231 Difference]: Finished difference. Result has 137 places, 496 transitions, 9048 flow [2022-11-25 17:41:45,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=4258, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9048, PETRI_PLACES=137, PETRI_TRANSITIONS=496} [2022-11-25 17:41:45,731 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 118 predicate places. [2022-11-25 17:41:45,732 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 496 transitions, 9048 flow [2022-11-25 17:41:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.36842105263158) internal successors, (1812), 19 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:45,732 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:45,732 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:45,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:45,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:45,935 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:45,935 INFO L85 PathProgramCache]: Analyzing trace with hash -89688281, now seen corresponding path program 4 times [2022-11-25 17:41:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:45,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350411132] [2022-11-25 17:41:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:41:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:46,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350411132] [2022-11-25 17:41:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350411132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59412090] [2022-11-25 17:41:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:41:46,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:46,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:41:46,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:41:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:41:46,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:47,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:41:47,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59412090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:47,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:47,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2022-11-25 17:41:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625503271] [2022-11-25 17:41:47,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:47,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:41:47,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:47,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:41:47,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:41:48,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 228 [2022-11-25 17:41:48,625 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 496 transitions, 9048 flow. Second operand has 15 states, 15 states have (on average 98.53333333333333) internal successors, (1478), 15 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:48,625 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:48,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 228 [2022-11-25 17:41:48,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:41:54,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:41:56,295 INFO L130 PetriNetUnfolder]: 3551/6251 cut-off events. [2022-11-25 17:41:56,295 INFO L131 PetriNetUnfolder]: For 76867/76867 co-relation queries the response was YES. [2022-11-25 17:41:56,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45350 conditions, 6251 events. 3551/6251 cut-off events. For 76867/76867 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43614 event pairs, 318 based on Foata normal form. 26/6277 useless extension candidates. Maximal degree in co-relation 43997. Up to 4780 conditions per place. [2022-11-25 17:41:56,463 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 535 selfloop transitions, 168 changer transitions 22/725 dead transitions. [2022-11-25 17:41:56,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 725 transitions, 13564 flow [2022-11-25 17:41:56,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:41:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:41:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2195 transitions. [2022-11-25 17:41:56,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45843776106934003 [2022-11-25 17:41:56,470 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2195 transitions. [2022-11-25 17:41:56,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2195 transitions. [2022-11-25 17:41:56,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:41:56,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2195 transitions. [2022-11-25 17:41:56,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 104.52380952380952) internal successors, (2195), 21 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:56,506 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:56,507 INFO L175 Difference]: Start difference. First operand has 137 places, 496 transitions, 9048 flow. Second operand 21 states and 2195 transitions. [2022-11-25 17:41:56,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 725 transitions, 13564 flow [2022-11-25 17:41:57,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 725 transitions, 12162 flow, removed 686 selfloop flow, removed 6 redundant places. [2022-11-25 17:41:57,317 INFO L231 Difference]: Finished difference. Result has 162 places, 565 transitions, 10013 flow [2022-11-25 17:41:57,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=7362, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=10013, PETRI_PLACES=162, PETRI_TRANSITIONS=565} [2022-11-25 17:41:57,318 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 143 predicate places. [2022-11-25 17:41:57,318 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 565 transitions, 10013 flow [2022-11-25 17:41:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 98.53333333333333) internal successors, (1478), 15 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:57,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:41:57,319 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:57,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:57,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:41:57,528 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:41:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1682525668, now seen corresponding path program 5 times [2022-11-25 17:41:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255654242] [2022-11-25 17:41:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:57,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255654242] [2022-11-25 17:41:57,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255654242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:57,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566442774] [2022-11-25 17:41:57,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:41:57,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:57,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:57,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:57,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:41:57,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 17:41:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:41:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:41:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:57,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:41:58,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566442774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:58,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:41:58,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 17:41:58,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772701756] [2022-11-25 17:41:58,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:41:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:41:58,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:41:58,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:41:58,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 565 transitions, 10013 flow. Second operand has 10 states, 10 states have (on average 100.9) internal successors, (1009), 10 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:41:58,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:41:58,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:41:58,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:00,723 INFO L130 PetriNetUnfolder]: 4271/7507 cut-off events. [2022-11-25 17:42:00,723 INFO L131 PetriNetUnfolder]: For 90915/90915 co-relation queries the response was YES. [2022-11-25 17:42:00,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54153 conditions, 7507 events. 4271/7507 cut-off events. For 90915/90915 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53935 event pairs, 336 based on Foata normal form. 156/7663 useless extension candidates. Maximal degree in co-relation 53984. Up to 2773 conditions per place. [2022-11-25 17:42:00,860 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 469 selfloop transitions, 447 changer transitions 0/916 dead transitions. [2022-11-25 17:42:00,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 916 transitions, 17242 flow [2022-11-25 17:42:00,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:42:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 17:42:00,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1468 transitions. [2022-11-25 17:42:00,866 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4598997493734336 [2022-11-25 17:42:00,866 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1468 transitions. [2022-11-25 17:42:00,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1468 transitions. [2022-11-25 17:42:00,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:00,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1468 transitions. [2022-11-25 17:42:00,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 104.85714285714286) internal successors, (1468), 14 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,879 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:00,879 INFO L175 Difference]: Start difference. First operand has 162 places, 565 transitions, 10013 flow. Second operand 14 states and 1468 transitions. [2022-11-25 17:42:00,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 916 transitions, 17242 flow [2022-11-25 17:42:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 916 transitions, 16569 flow, removed 327 selfloop flow, removed 5 redundant places. [2022-11-25 17:42:01,860 INFO L231 Difference]: Finished difference. Result has 178 places, 705 transitions, 14160 flow [2022-11-25 17:42:01,861 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=9501, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14160, PETRI_PLACES=178, PETRI_TRANSITIONS=705} [2022-11-25 17:42:01,861 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 159 predicate places. [2022-11-25 17:42:01,861 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 705 transitions, 14160 flow [2022-11-25 17:42:01,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.9) internal successors, (1009), 10 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:01,862 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:01,862 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:01,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:02,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:02,063 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:42:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2111302271, now seen corresponding path program 6 times [2022-11-25 17:42:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058320203] [2022-11-25 17:42:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:02,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:02,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:02,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058320203] [2022-11-25 17:42:02,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058320203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329560080] [2022-11-25 17:42:02,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:42:02,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:02,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:02,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:42:02,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:42:02,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:02,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:42:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:03,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329560080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:04,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:04,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 17:42:04,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186038353] [2022-11-25 17:42:04,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:42:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:42:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:42:06,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 228 [2022-11-25 17:42:06,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 705 transitions, 14160 flow. Second operand has 19 states, 19 states have (on average 95.26315789473684) internal successors, (1810), 19 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:06,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:06,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 228 [2022-11-25 17:42:06,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:12,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:42:14,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:42:21,658 INFO L130 PetriNetUnfolder]: 5052/8776 cut-off events. [2022-11-25 17:42:21,659 INFO L131 PetriNetUnfolder]: For 146520/146520 co-relation queries the response was YES. [2022-11-25 17:42:21,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71617 conditions, 8776 events. 5052/8776 cut-off events. For 146520/146520 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 63954 event pairs, 216 based on Foata normal form. 10/8786 useless extension candidates. Maximal degree in co-relation 71452. Up to 3141 conditions per place. [2022-11-25 17:42:21,776 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 362 selfloop transitions, 690 changer transitions 17/1069 dead transitions. [2022-11-25 17:42:21,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 1069 transitions, 23305 flow [2022-11-25 17:42:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:42:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:42:21,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2492 transitions. [2022-11-25 17:42:21,783 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43719298245614036 [2022-11-25 17:42:21,783 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2492 transitions. [2022-11-25 17:42:21,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2492 transitions. [2022-11-25 17:42:21,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:21,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2492 transitions. [2022-11-25 17:42:21,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 99.68) internal successors, (2492), 25 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,800 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:21,800 INFO L175 Difference]: Start difference. First operand has 178 places, 705 transitions, 14160 flow. Second operand 25 states and 2492 transitions. [2022-11-25 17:42:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 1069 transitions, 23305 flow [2022-11-25 17:42:23,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 1069 transitions, 22885 flow, removed 182 selfloop flow, removed 3 redundant places. [2022-11-25 17:42:23,212 INFO L231 Difference]: Finished difference. Result has 208 places, 937 transitions, 21775 flow [2022-11-25 17:42:23,213 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=13894, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=480, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21775, PETRI_PLACES=208, PETRI_TRANSITIONS=937} [2022-11-25 17:42:23,214 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 189 predicate places. [2022-11-25 17:42:23,214 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 937 transitions, 21775 flow [2022-11-25 17:42:23,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 95.26315789473684) internal successors, (1810), 19 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:23,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:23,215 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:23,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:23,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:42:23,421 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:42:23,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:23,421 INFO L85 PathProgramCache]: Analyzing trace with hash 942840412, now seen corresponding path program 7 times [2022-11-25 17:42:23,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:23,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300275151] [2022-11-25 17:42:23,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:23,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:23,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300275151] [2022-11-25 17:42:23,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300275151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:23,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470566496] [2022-11-25 17:42:23,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:42:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:23,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:23,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:42:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:42:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:23,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:42:23,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470566496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:23,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:23,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-25 17:42:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751566977] [2022-11-25 17:42:23,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:23,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:42:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:23,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:42:23,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:42:23,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:42:23,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 937 transitions, 21775 flow. Second operand has 9 states, 9 states have (on average 101.33333333333333) internal successors, (912), 9 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:23,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:23,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:42:23,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:28,594 INFO L130 PetriNetUnfolder]: 5407/9362 cut-off events. [2022-11-25 17:42:28,594 INFO L131 PetriNetUnfolder]: For 183736/183736 co-relation queries the response was YES. [2022-11-25 17:42:28,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82059 conditions, 9362 events. 5407/9362 cut-off events. For 183736/183736 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 69181 event pairs, 106 based on Foata normal form. 88/9450 useless extension candidates. Maximal degree in co-relation 81876. Up to 3321 conditions per place. [2022-11-25 17:42:28,732 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 974 selfloop transitions, 461 changer transitions 0/1435 dead transitions. [2022-11-25 17:42:28,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1435 transitions, 32216 flow [2022-11-25 17:42:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:42:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:42:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1566 transitions. [2022-11-25 17:42:28,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45789473684210524 [2022-11-25 17:42:28,737 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1566 transitions. [2022-11-25 17:42:28,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1566 transitions. [2022-11-25 17:42:28,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:28,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1566 transitions. [2022-11-25 17:42:28,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 104.4) internal successors, (1566), 15 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:28,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:28,749 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:28,749 INFO L175 Difference]: Start difference. First operand has 208 places, 937 transitions, 21775 flow. Second operand 15 states and 1566 transitions. [2022-11-25 17:42:28,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1435 transitions, 32216 flow [2022-11-25 17:42:30,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1435 transitions, 29941 flow, removed 1115 selfloop flow, removed 8 redundant places. [2022-11-25 17:42:30,876 INFO L231 Difference]: Finished difference. Result has 218 places, 1026 transitions, 23709 flow [2022-11-25 17:42:30,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=19948, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=23709, PETRI_PLACES=218, PETRI_TRANSITIONS=1026} [2022-11-25 17:42:30,878 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 199 predicate places. [2022-11-25 17:42:30,878 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 1026 transitions, 23709 flow [2022-11-25 17:42:30,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.33333333333333) internal successors, (912), 9 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:30,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:30,878 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:30,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:31,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:42:31,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:42:31,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:31,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1861212597, now seen corresponding path program 8 times [2022-11-25 17:42:31,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:31,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851415451] [2022-11-25 17:42:31,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:31,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:42:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:31,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851415451] [2022-11-25 17:42:31,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851415451] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:31,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026567505] [2022-11-25 17:42:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:31,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:31,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:42:31,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:31,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:42:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:32,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:32,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026567505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:32,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:32,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-11-25 17:42:32,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645095894] [2022-11-25 17:42:32,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:42:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:42:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:42:34,015 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 228 [2022-11-25 17:42:34,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 1026 transitions, 23709 flow. Second operand has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:34,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:34,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 228 [2022-11-25 17:42:34,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:42:49,485 INFO L130 PetriNetUnfolder]: 8122/13964 cut-off events. [2022-11-25 17:42:49,485 INFO L131 PetriNetUnfolder]: For 303310/303310 co-relation queries the response was YES. [2022-11-25 17:42:49,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127662 conditions, 13964 events. 8122/13964 cut-off events. For 303310/303310 co-relation queries the response was YES. Maximal size of possible extension queue 970. Compared 107806 event pairs, 446 based on Foata normal form. 38/14002 useless extension candidates. Maximal degree in co-relation 127469. Up to 5193 conditions per place. [2022-11-25 17:42:49,696 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 613 selfloop transitions, 1277 changer transitions 32/1922 dead transitions. [2022-11-25 17:42:49,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1922 transitions, 48413 flow [2022-11-25 17:42:49,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:42:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-25 17:42:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3799 transitions. [2022-11-25 17:42:49,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45033191085822666 [2022-11-25 17:42:49,706 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3799 transitions. [2022-11-25 17:42:49,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3799 transitions. [2022-11-25 17:42:49,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:42:49,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3799 transitions. [2022-11-25 17:42:49,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 102.67567567567568) internal successors, (3799), 37 states have internal predecessors, (3799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:49,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 228.0) internal successors, (8664), 38 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:49,727 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 228.0) internal successors, (8664), 38 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:49,728 INFO L175 Difference]: Start difference. First operand has 218 places, 1026 transitions, 23709 flow. Second operand 37 states and 3799 transitions. [2022-11-25 17:42:49,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1922 transitions, 48413 flow [2022-11-25 17:42:53,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1922 transitions, 47596 flow, removed 402 selfloop flow, removed 1 redundant places. [2022-11-25 17:42:53,533 INFO L231 Difference]: Finished difference. Result has 269 places, 1693 transitions, 45486 flow [2022-11-25 17:42:53,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=23412, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=45486, PETRI_PLACES=269, PETRI_TRANSITIONS=1693} [2022-11-25 17:42:53,534 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 250 predicate places. [2022-11-25 17:42:53,534 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 1693 transitions, 45486 flow [2022-11-25 17:42:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:53,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:42:53,535 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:53,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:53,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:42:53,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:42:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -77256193, now seen corresponding path program 9 times [2022-11-25 17:42:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398244538] [2022-11-25 17:42:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:54,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398244538] [2022-11-25 17:42:54,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398244538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:42:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849294246] [2022-11-25 17:42:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:42:54,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:54,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:54,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:54,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:42:54,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:42:54,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:54,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:42:54,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:54,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:42:55,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849294246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:55,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:42:55,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2022-11-25 17:42:55,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117001021] [2022-11-25 17:42:55,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:55,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:42:55,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:42:55,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:42:56,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 228 [2022-11-25 17:42:56,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 1693 transitions, 45486 flow. Second operand has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:42:56,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:42:56,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 228 [2022-11-25 17:42:56,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:18,876 INFO L130 PetriNetUnfolder]: 11641/20177 cut-off events. [2022-11-25 17:43:18,876 INFO L131 PetriNetUnfolder]: For 548593/548593 co-relation queries the response was YES. [2022-11-25 17:43:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202815 conditions, 20177 events. 11641/20177 cut-off events. For 548593/548593 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 164536 event pairs, 767 based on Foata normal form. 48/20225 useless extension candidates. Maximal degree in co-relation 202597. Up to 7397 conditions per place. [2022-11-25 17:43:19,417 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 950 selfloop transitions, 1933 changer transitions 35/2918 dead transitions. [2022-11-25 17:43:19,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 2918 transitions, 84723 flow [2022-11-25 17:43:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 17:43:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-25 17:43:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4121 transitions. [2022-11-25 17:43:19,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4518640350877193 [2022-11-25 17:43:19,428 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4121 transitions. [2022-11-25 17:43:19,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4121 transitions. [2022-11-25 17:43:19,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:19,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4121 transitions. [2022-11-25 17:43:19,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 103.025) internal successors, (4121), 40 states have internal predecessors, (4121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 228.0) internal successors, (9348), 41 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,455 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 228.0) internal successors, (9348), 41 states have internal predecessors, (9348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,456 INFO L175 Difference]: Start difference. First operand has 269 places, 1693 transitions, 45486 flow. Second operand 40 states and 4121 transitions. [2022-11-25 17:43:19,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 2918 transitions, 84723 flow [2022-11-25 17:43:29,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 2918 transitions, 78421 flow, removed 3140 selfloop flow, removed 5 redundant places. [2022-11-25 17:43:29,480 INFO L231 Difference]: Finished difference. Result has 320 places, 2600 transitions, 73859 flow [2022-11-25 17:43:29,481 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=42173, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=73859, PETRI_PLACES=320, PETRI_TRANSITIONS=2600} [2022-11-25 17:43:29,482 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 301 predicate places. [2022-11-25 17:43:29,482 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 2600 transitions, 73859 flow [2022-11-25 17:43:29,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:29,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:29,483 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:29,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:29,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:43:29,689 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:43:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1527752470, now seen corresponding path program 10 times [2022-11-25 17:43:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:29,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834359774] [2022-11-25 17:43:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:43:29,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834359774] [2022-11-25 17:43:29,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834359774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:29,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493820949] [2022-11-25 17:43:29,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:43:29,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:29,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:29,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:29,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:43:29,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:43:29,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:29,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:43:29,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:43:30,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:43:30,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493820949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:30,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:30,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 17:43:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096957696] [2022-11-25 17:43:30,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:43:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:43:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:43:30,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:43:30,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 2600 transitions, 73859 flow. Second operand has 10 states, 10 states have (on average 101.5) internal successors, (1015), 10 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:30,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:30,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:43:30,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:52,471 INFO L130 PetriNetUnfolder]: 12151/21052 cut-off events. [2022-11-25 17:43:52,472 INFO L131 PetriNetUnfolder]: For 612217/612217 co-relation queries the response was YES. [2022-11-25 17:43:52,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214278 conditions, 21052 events. 12151/21052 cut-off events. For 612217/612217 co-relation queries the response was YES. Maximal size of possible extension queue 1348. Compared 172604 event pairs, 1336 based on Foata normal form. 578/21630 useless extension candidates. Maximal degree in co-relation 214039. Up to 18579 conditions per place. [2022-11-25 17:43:52,955 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 2586 selfloop transitions, 321 changer transitions 0/2907 dead transitions. [2022-11-25 17:43:52,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 2907 transitions, 86432 flow [2022-11-25 17:43:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:43:52,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 17:43:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1379 transitions. [2022-11-25 17:43:52,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46524966261808365 [2022-11-25 17:43:52,959 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1379 transitions. [2022-11-25 17:43:52,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1379 transitions. [2022-11-25 17:43:52,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:52,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1379 transitions. [2022-11-25 17:43:52,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 106.07692307692308) internal successors, (1379), 13 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:52,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 228.0) internal successors, (3192), 14 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:52,967 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 228.0) internal successors, (3192), 14 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:52,967 INFO L175 Difference]: Start difference. First operand has 320 places, 2600 transitions, 73859 flow. Second operand 13 states and 1379 transitions. [2022-11-25 17:43:52,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 2907 transitions, 86432 flow [2022-11-25 17:44:05,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 2907 transitions, 82336 flow, removed 2042 selfloop flow, removed 2 redundant places. [2022-11-25 17:44:05,854 INFO L231 Difference]: Finished difference. Result has 337 places, 2739 transitions, 75001 flow [2022-11-25 17:44:05,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=68396, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=75001, PETRI_PLACES=337, PETRI_TRANSITIONS=2739} [2022-11-25 17:44:05,856 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 318 predicate places. [2022-11-25 17:44:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 2739 transitions, 75001 flow [2022-11-25 17:44:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.5) internal successors, (1015), 10 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:05,857 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:05,858 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:05,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 17:44:06,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:06,063 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:44:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:06,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1288213733, now seen corresponding path program 11 times [2022-11-25 17:44:06,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:06,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140704226] [2022-11-25 17:44:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:06,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:44:06,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140704226] [2022-11-25 17:44:06,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140704226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:06,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092208541] [2022-11-25 17:44:06,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:44:06,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:06,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:06,146 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:06,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:44:06,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:06,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:44:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:44:06,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:44:06,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092208541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:06,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:06,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 17:44:06,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391708238] [2022-11-25 17:44:06,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:06,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:44:06,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:44:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:44:06,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 228 [2022-11-25 17:44:06,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 2739 transitions, 75001 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:06,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:06,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 228 [2022-11-25 17:44:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:22,565 INFO L130 PetriNetUnfolder]: 6997/12178 cut-off events. [2022-11-25 17:44:22,566 INFO L131 PetriNetUnfolder]: For 405795/405795 co-relation queries the response was YES. [2022-11-25 17:44:22,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120529 conditions, 12178 events. 6997/12178 cut-off events. For 405795/405795 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 93834 event pairs, 534 based on Foata normal form. 794/12972 useless extension candidates. Maximal degree in co-relation 120274. Up to 7720 conditions per place. [2022-11-25 17:44:22,873 INFO L137 encePairwiseOnDemand]: 225/228 looper letters, 1375 selfloop transitions, 386 changer transitions 2/1763 dead transitions. [2022-11-25 17:44:22,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1763 transitions, 50529 flow [2022-11-25 17:44:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:44:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:44:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2022-11-25 17:44:22,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-11-25 17:44:22,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2022-11-25 17:44:22,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2022-11-25 17:44:22,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:22,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2022-11-25 17:44:22,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:22,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:22,880 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 228.0) internal successors, (1368), 6 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:22,880 INFO L175 Difference]: Start difference. First operand has 337 places, 2739 transitions, 75001 flow. Second operand 5 states and 551 transitions. [2022-11-25 17:44:22,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1763 transitions, 50529 flow [2022-11-25 17:44:28,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1763 transitions, 46520 flow, removed 701 selfloop flow, removed 15 redundant places. [2022-11-25 17:44:28,440 INFO L231 Difference]: Finished difference. Result has 323 places, 1611 transitions, 40926 flow [2022-11-25 17:44:28,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=37607, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=40926, PETRI_PLACES=323, PETRI_TRANSITIONS=1611} [2022-11-25 17:44:28,441 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 304 predicate places. [2022-11-25 17:44:28,441 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 1611 transitions, 40926 flow [2022-11-25 17:44:28,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:28,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:28,442 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:28,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:28,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:44:28,643 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:44:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:28,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1985054105, now seen corresponding path program 12 times [2022-11-25 17:44:28,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:28,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98541770] [2022-11-25 17:44:28,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:28,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98541770] [2022-11-25 17:44:29,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98541770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:44:29,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521608630] [2022-11-25 17:44:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:44:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:29,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:29,641 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:29,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:44:29,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 17:44:29,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 17:44:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:44:30,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:44:32,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521608630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:32,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:44:32,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 5] total 21 [2022-11-25 17:44:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176872231] [2022-11-25 17:44:32,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:44:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:44:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:44:35,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 228 [2022-11-25 17:44:35,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 1611 transitions, 40926 flow. Second operand has 23 states, 23 states have (on average 92.08695652173913) internal successors, (2118), 23 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:35,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:35,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 228 [2022-11-25 17:44:35,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:44:42,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:55,558 INFO L130 PetriNetUnfolder]: 7914/13729 cut-off events. [2022-11-25 17:44:55,558 INFO L131 PetriNetUnfolder]: For 395550/395550 co-relation queries the response was YES. [2022-11-25 17:44:55,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135316 conditions, 13729 events. 7914/13729 cut-off events. For 395550/395550 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 106742 event pairs, 590 based on Foata normal form. 8/13737 useless extension candidates. Maximal degree in co-relation 135071. Up to 7750 conditions per place. [2022-11-25 17:44:55,886 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 752 selfloop transitions, 1225 changer transitions 33/2010 dead transitions. [2022-11-25 17:44:55,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 2010 transitions, 53471 flow [2022-11-25 17:44:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 17:44:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 17:44:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2713 transitions. [2022-11-25 17:44:55,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424968671679198 [2022-11-25 17:44:55,896 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2713 transitions. [2022-11-25 17:44:55,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2713 transitions. [2022-11-25 17:44:55,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:44:55,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2713 transitions. [2022-11-25 17:44:55,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 96.89285714285714) internal successors, (2713), 28 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 228.0) internal successors, (6612), 29 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,911 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 228.0) internal successors, (6612), 29 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:55,911 INFO L175 Difference]: Start difference. First operand has 323 places, 1611 transitions, 40926 flow. Second operand 28 states and 2713 transitions. [2022-11-25 17:44:55,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 2010 transitions, 53471 flow [2022-11-25 17:45:02,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 2010 transitions, 53373 flow, removed 49 selfloop flow, removed 0 redundant places. [2022-11-25 17:45:02,179 INFO L231 Difference]: Finished difference. Result has 360 places, 1858 transitions, 52896 flow [2022-11-25 17:45:02,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=40836, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=52896, PETRI_PLACES=360, PETRI_TRANSITIONS=1858} [2022-11-25 17:45:02,181 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 341 predicate places. [2022-11-25 17:45:02,181 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 1858 transitions, 52896 flow [2022-11-25 17:45:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 92.08695652173913) internal successors, (2118), 23 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:02,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:02,182 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:02,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:02,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:02,382 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:45:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:02,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1768708488, now seen corresponding path program 13 times [2022-11-25 17:45:02,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:02,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94100277] [2022-11-25 17:45:02,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:02,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:45:02,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:02,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94100277] [2022-11-25 17:45:02,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94100277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:02,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754832736] [2022-11-25 17:45:02,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:45:02,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:02,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:02,523 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:02,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:45:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:45:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:45:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:45:02,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754832736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:02,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:02,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-25 17:45:02,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580078235] [2022-11-25 17:45:02,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:02,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:45:02,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:02,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:45:02,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:45:03,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:45:03,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 1858 transitions, 52896 flow. Second operand has 9 states, 9 states have (on average 101.33333333333333) internal successors, (912), 9 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:03,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:03,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:45:03,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:16,296 INFO L130 PetriNetUnfolder]: 8055/14101 cut-off events. [2022-11-25 17:45:16,296 INFO L131 PetriNetUnfolder]: For 471192/471192 co-relation queries the response was YES. [2022-11-25 17:45:16,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146700 conditions, 14101 events. 8055/14101 cut-off events. For 471192/471192 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 111523 event pairs, 480 based on Foata normal form. 18/14119 useless extension candidates. Maximal degree in co-relation 146437. Up to 9298 conditions per place. [2022-11-25 17:45:16,784 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 1808 selfloop transitions, 262 changer transitions 14/2084 dead transitions. [2022-11-25 17:45:16,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 2084 transitions, 62102 flow [2022-11-25 17:45:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:45:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:45:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1562 transitions. [2022-11-25 17:45:16,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4567251461988304 [2022-11-25 17:45:16,787 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1562 transitions. [2022-11-25 17:45:16,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1562 transitions. [2022-11-25 17:45:16,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:16,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1562 transitions. [2022-11-25 17:45:16,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 104.13333333333334) internal successors, (1562), 15 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:16,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:16,793 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 228.0) internal successors, (3648), 16 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:16,793 INFO L175 Difference]: Start difference. First operand has 360 places, 1858 transitions, 52896 flow. Second operand 15 states and 1562 transitions. [2022-11-25 17:45:16,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 2084 transitions, 62102 flow [2022-11-25 17:45:24,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 2084 transitions, 60465 flow, removed 802 selfloop flow, removed 8 redundant places. [2022-11-25 17:45:24,130 INFO L231 Difference]: Finished difference. Result has 369 places, 1942 transitions, 54352 flow [2022-11-25 17:45:24,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=50772, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1838, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=54352, PETRI_PLACES=369, PETRI_TRANSITIONS=1942} [2022-11-25 17:45:24,132 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 350 predicate places. [2022-11-25 17:45:24,132 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1942 transitions, 54352 flow [2022-11-25 17:45:24,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.33333333333333) internal successors, (912), 9 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:24,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:24,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:24,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:24,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-25 17:45:24,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:45:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1898845982, now seen corresponding path program 14 times [2022-11-25 17:45:24,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:24,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052426484] [2022-11-25 17:45:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:24,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:45:24,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052426484] [2022-11-25 17:45:24,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052426484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437569255] [2022-11-25 17:45:24,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:45:24,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:24,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:24,479 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:24,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:45:24,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:45:24,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:24,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:45:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:45:24,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:45:24,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437569255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:24,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:24,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-25 17:45:24,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71641685] [2022-11-25 17:45:24,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:24,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:45:24,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:24,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:45:24,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:45:24,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:45:24,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1942 transitions, 54352 flow. Second operand has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 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) [2022-11-25 17:45:24,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:24,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:45:24,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:45:41,053 INFO L130 PetriNetUnfolder]: 9164/16263 cut-off events. [2022-11-25 17:45:41,053 INFO L131 PetriNetUnfolder]: For 599297/599297 co-relation queries the response was YES. [2022-11-25 17:45:41,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168744 conditions, 16263 events. 9164/16263 cut-off events. For 599297/599297 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 132171 event pairs, 414 based on Foata normal form. 326/16589 useless extension candidates. Maximal degree in co-relation 168464. Up to 5589 conditions per place. [2022-11-25 17:45:41,502 INFO L137 encePairwiseOnDemand]: 222/228 looper letters, 1525 selfloop transitions, 792 changer transitions 194/2511 dead transitions. [2022-11-25 17:45:41,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 2511 transitions, 70089 flow [2022-11-25 17:45:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:45:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:45:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2022-11-25 17:45:41,506 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4594298245614035 [2022-11-25 17:45:41,506 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2022-11-25 17:45:41,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2022-11-25 17:45:41,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:45:41,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2022-11-25 17:45:41,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:41,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 228.0) internal successors, (2964), 13 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:41,515 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 228.0) internal successors, (2964), 13 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:41,515 INFO L175 Difference]: Start difference. First operand has 369 places, 1942 transitions, 54352 flow. Second operand 12 states and 1257 transitions. [2022-11-25 17:45:41,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 2511 transitions, 70089 flow [2022-11-25 17:45:49,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 2511 transitions, 69217 flow, removed 429 selfloop flow, removed 2 redundant places. [2022-11-25 17:45:49,726 INFO L231 Difference]: Finished difference. Result has 385 places, 1925 transitions, 55325 flow [2022-11-25 17:45:49,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=48219, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1786, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=55325, PETRI_PLACES=385, PETRI_TRANSITIONS=1925} [2022-11-25 17:45:49,727 INFO L288 CegarLoopForPetriNet]: 19 programPoint places, 366 predicate places. [2022-11-25 17:45:49,728 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1925 transitions, 55325 flow [2022-11-25 17:45:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 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) [2022-11-25 17:45:49,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:45:49,728 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:49,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:49,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 17:45:49,929 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:45:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1707003502, now seen corresponding path program 15 times [2022-11-25 17:45:49,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:49,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083366059] [2022-11-25 17:45:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:49,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:50,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083366059] [2022-11-25 17:45:50,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083366059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:50,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008598204] [2022-11-25 17:45:50,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:45:50,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:50,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:50,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:50,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_402fd49f-14be-4450-9c69-3429f68c0724/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:45:50,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 17:45:50,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:45:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:45:50,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:50,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:45:50,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008598204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:50,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:45:50,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2022-11-25 17:45:50,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86027187] [2022-11-25 17:45:50,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:50,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:45:50,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:50,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:45:50,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:45:50,591 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 228 [2022-11-25 17:45:50,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1925 transitions, 55325 flow. Second operand has 9 states, 9 states have (on average 101.44444444444444) internal successors, (913), 9 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:50,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:45:50,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 228 [2022-11-25 17:45:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand