./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8 --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 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- 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-2329fc7 [2022-12-13 13:04:03,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:04:03,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:04:03,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:04:03,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:04:03,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:04:03,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:04:03,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:04:03,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:04:03,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:04:03,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:04:03,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:04:03,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:04:03,619 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:04:03,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:04:03,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:04:03,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:04:03,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:04:03,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:04:03,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:04:03,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:04:03,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:04:03,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:04:03,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:04:03,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:04:03,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:04:03,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:04:03,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:04:03,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:04:03,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:04:03,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:04:03,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:04:03,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:04:03,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:04:03,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:04:03,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:04:03,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:04:03,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:04:03,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:04:03,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:04:03,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:04:03,644 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:04:03,662 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:04:03,663 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:04:03,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:04:03,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:04:03,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:04:03,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:04:03,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:04:03,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:04:03,668 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:04:03,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:04:03,669 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:04:03,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:04:03,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:04:03,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:04:03,671 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:04:03,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:04:03,672 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:04:03,672 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_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2022-12-13 13:04:03,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:04:03,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:04:03,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:04:03,861 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:04:03,861 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:04:03,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-12-13 13:04:06,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:04:06,659 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:04:06,660 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-12-13 13:04:06,672 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/data/b48c0aa67/785aa94e39c049cd83de44307db7ce5b/FLAG23592c9f6 [2022-12-13 13:04:06,686 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/data/b48c0aa67/785aa94e39c049cd83de44307db7ce5b [2022-12-13 13:04:06,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:04:06,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:04:06,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:06,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:04:06,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:04:06,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:06" (1/1) ... [2022-12-13 13:04:06,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb2e405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:06, skipping insertion in model container [2022-12-13 13:04:06,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:04:06" (1/1) ... [2022-12-13 13:04:06,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:04:06,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:04:07,009 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_579ff9dd-c6e2-4e05-9026-a7562ff70e15/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-12-13 13:04:07,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:07,038 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:04:07,062 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_579ff9dd-c6e2-4e05-9026-a7562ff70e15/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-12-13 13:04:07,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:04:07,100 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:04:07,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07 WrapperNode [2022-12-13 13:04:07,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:04:07,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:07,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:04:07,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:04:07,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,134 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 193 [2022-12-13 13:04:07,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:04:07,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:04:07,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:04:07,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:04:07,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:04:07,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:04:07,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:04:07,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:04:07,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (1/1) ... [2022-12-13 13:04:07,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:04:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:07,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:04:07,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:04:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:04:07,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 13:04:07,232 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:04:07,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:04:07,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:04:07,234 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:04:07,360 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:04:07,362 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:04:07,584 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:04:07,593 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:04:07,593 INFO L300 CfgBuilder]: Removed 25 assume(true) statements. [2022-12-13 13:04:07,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:07 BoogieIcfgContainer [2022-12-13 13:04:07,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:04:07,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:04:07,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:04:07,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:04:07,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:04:06" (1/3) ... [2022-12-13 13:04:07,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e89bd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:07, skipping insertion in model container [2022-12-13 13:04:07,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:04:07" (2/3) ... [2022-12-13 13:04:07,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e89bd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:04:07, skipping insertion in model container [2022-12-13 13:04:07,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:04:07" (3/3) ... [2022-12-13 13:04:07,605 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2022-12-13 13:04:07,614 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 13:04:07,623 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:04:07,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 13:04:07,624 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:04:07,680 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 13:04:07,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 200 transitions, 408 flow [2022-12-13 13:04:07,780 INFO L130 PetriNetUnfolder]: 49/284 cut-off events. [2022-12-13 13:04:07,780 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 13:04:07,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 284 events. 49/284 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1011 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2022-12-13 13:04:07,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 200 transitions, 408 flow [2022-12-13 13:04:07,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 195 transitions, 395 flow [2022-12-13 13:04:07,796 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:04:07,805 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 195 transitions, 395 flow [2022-12-13 13:04:07,807 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 195 transitions, 395 flow [2022-12-13 13:04:07,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 195 transitions, 395 flow [2022-12-13 13:04:07,846 INFO L130 PetriNetUnfolder]: 48/279 cut-off events. [2022-12-13 13:04:07,846 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:07,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 279 events. 48/279 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 958 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 160. Up to 8 conditions per place. [2022-12-13 13:04:07,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 12780 [2022-12-13 13:04:09,803 INFO L134 LiptonReduction]: Checked pairs total: 18141 [2022-12-13 13:04:09,803 INFO L136 LiptonReduction]: Total number of compositions: 156 [2022-12-13 13:04:09,818 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:04:09,824 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;@8c75bd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:04:09,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 13:04:09,829 INFO L130 PetriNetUnfolder]: 8/30 cut-off events. [2022-12-13 13:04:09,829 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:09,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:09,830 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:09,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:04:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1244002615, now seen corresponding path program 1 times [2022-12-13 13:04:09,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:09,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654024401] [2022-12-13 13:04:09,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:09,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:10,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654024401] [2022-12-13 13:04:10,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654024401] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:10,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:10,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:04:10,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950884370] [2022-12-13 13:04:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:10,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:10,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:10,054 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2022-12-13 13:04:10,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 68 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:10,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2022-12-13 13:04:10,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:10,176 INFO L130 PetriNetUnfolder]: 325/676 cut-off events. [2022-12-13 13:04:10,176 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:10,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1281 conditions, 676 events. 325/676 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3184 event pairs, 256 based on Foata normal form. 140/684 useless extension candidates. Maximal degree in co-relation 1227. Up to 599 conditions per place. [2022-12-13 13:04:10,180 INFO L137 encePairwiseOnDemand]: 332/356 looper letters, 37 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-12-13 13:04:10,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 48 transitions, 179 flow [2022-12-13 13:04:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-12-13 13:04:10,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5205992509363296 [2022-12-13 13:04:10,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-12-13 13:04:10,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-12-13 13:04:10,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:10,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-12-13 13:04:10,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,210 INFO L175 Difference]: Start difference. First operand has 46 places, 68 transitions, 141 flow. Second operand 3 states and 556 transitions. [2022-12-13 13:04:10,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 48 transitions, 179 flow [2022-12-13 13:04:10,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:04:10,214 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 111 flow [2022-12-13 13:04:10,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2022-12-13 13:04:10,217 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2022-12-13 13:04:10,218 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 111 flow [2022-12-13 13:04:10,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:10,218 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:10,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:04:10,218 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:04:10,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1343183748, now seen corresponding path program 1 times [2022-12-13 13:04:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:10,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044937906] [2022-12-13 13:04:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:10,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:10,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044937906] [2022-12-13 13:04:10,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044937906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:10,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:10,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:04:10,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993124486] [2022-12-13 13:04:10,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:10,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:10,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:10,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:10,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2022-12-13 13:04:10,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:10,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2022-12-13 13:04:10,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:10,398 INFO L130 PetriNetUnfolder]: 309/689 cut-off events. [2022-12-13 13:04:10,398 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:10,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 689 events. 309/689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3647 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 1290. Up to 565 conditions per place. [2022-12-13 13:04:10,401 INFO L137 encePairwiseOnDemand]: 353/356 looper letters, 55 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2022-12-13 13:04:10,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 261 flow [2022-12-13 13:04:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2022-12-13 13:04:10,403 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5168539325842697 [2022-12-13 13:04:10,403 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2022-12-13 13:04:10,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2022-12-13 13:04:10,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:10,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2022-12-13 13:04:10,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,413 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 111 flow. Second operand 3 states and 552 transitions. [2022-12-13 13:04:10,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 261 flow [2022-12-13 13:04:10,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 257 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:10,416 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 115 flow [2022-12-13 13:04:10,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2022-12-13 13:04:10,418 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2022-12-13 13:04:10,418 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 115 flow [2022-12-13 13:04:10,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:10,419 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:10,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:04:10,420 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:04:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1371380205, now seen corresponding path program 1 times [2022-12-13 13:04:10,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491531867] [2022-12-13 13:04:10,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:10,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491531867] [2022-12-13 13:04:10,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491531867] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:10,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014079589] [2022-12-13 13:04:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:10,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:10,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:04:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:04:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:10,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:10,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014079589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:10,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:10,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:04:10,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446762604] [2022-12-13 13:04:10,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:04:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:10,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:04:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:04:10,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 356 [2022-12-13 13:04:10,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 115 flow. Second operand has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:10,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 356 [2022-12-13 13:04:10,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:10,745 INFO L130 PetriNetUnfolder]: 323/676 cut-off events. [2022-12-13 13:04:10,745 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-12-13 13:04:10,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1331 conditions, 676 events. 323/676 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3137 event pairs, 256 based on Foata normal form. 3/568 useless extension candidates. Maximal degree in co-relation 1304. Up to 584 conditions per place. [2022-12-13 13:04:10,748 INFO L137 encePairwiseOnDemand]: 353/356 looper letters, 37 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2022-12-13 13:04:10,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 211 flow [2022-12-13 13:04:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1029 transitions. [2022-12-13 13:04:10,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48174157303370785 [2022-12-13 13:04:10,750 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1029 transitions. [2022-12-13 13:04:10,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1029 transitions. [2022-12-13 13:04:10,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:10,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1029 transitions. [2022-12-13 13:04:10,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 171.5) internal successors, (1029), 6 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 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) [2022-12-13 13:04:10,755 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 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) [2022-12-13 13:04:10,755 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 115 flow. Second operand 6 states and 1029 transitions. [2022-12-13 13:04:10,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 211 flow [2022-12-13 13:04:10,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:04:10,756 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 147 flow [2022-12-13 13:04:10,756 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=147, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2022-12-13 13:04:10,757 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2022-12-13 13:04:10,757 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 147 flow [2022-12-13 13:04:10,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 165.57142857142858) internal successors, (1159), 7 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:10,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:10,758 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-12-13 13:04:10,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:04:10,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:10,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:04:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash 742449888, now seen corresponding path program 2 times [2022-12-13 13:04:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:10,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651738349] [2022-12-13 13:04:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:11,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651738349] [2022-12-13 13:04:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651738349] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544769493] [2022-12-13 13:04:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:11,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:11,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:11,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:11,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:04:11,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:04:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:04:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:11,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:04:11,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544769493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:11,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:11,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 13:04:11,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009154317] [2022-12-13 13:04:11,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:11,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:04:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:11,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:04:11,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:04:11,188 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 356 [2022-12-13 13:04:11,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 147 flow. Second operand has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:11,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:11,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 356 [2022-12-13 13:04:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:11,324 INFO L130 PetriNetUnfolder]: 324/682 cut-off events. [2022-12-13 13:04:11,324 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 13:04:11,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1351 conditions, 682 events. 324/682 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3108 event pairs, 256 based on Foata normal form. 6/578 useless extension candidates. Maximal degree in co-relation 1292. Up to 584 conditions per place. [2022-12-13 13:04:11,326 INFO L137 encePairwiseOnDemand]: 353/356 looper letters, 37 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2022-12-13 13:04:11,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 279 flow [2022-12-13 13:04:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 13:04:11,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 13:04:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2022 transitions. [2022-12-13 13:04:11,330 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47331460674157305 [2022-12-13 13:04:11,330 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2022 transitions. [2022-12-13 13:04:11,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2022 transitions. [2022-12-13 13:04:11,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:11,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2022 transitions. [2022-12-13 13:04:11,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 168.5) internal successors, (2022), 12 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:11,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 356.0) internal successors, (4628), 13 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:11,342 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 356.0) internal successors, (4628), 13 states have internal predecessors, (4628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:11,342 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 147 flow. Second operand 12 states and 2022 transitions. [2022-12-13 13:04:11,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 279 flow [2022-12-13 13:04:11,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 265 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:11,346 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 217 flow [2022-12-13 13:04:11,346 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=217, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2022-12-13 13:04:11,347 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 26 predicate places. [2022-12-13 13:04:11,347 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 217 flow [2022-12-13 13:04:11,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 165.30769230769232) internal successors, (2149), 13 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:11,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:11,349 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 13:04:11,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 13:04:11,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:11,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 13:04:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1669240768, now seen corresponding path program 3 times [2022-12-13 13:04:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902475683] [2022-12-13 13:04:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:11,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:04:11,586 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:04:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:04:11,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:04:11,635 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:04:11,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 13:04:11,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 13:04:11,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 13:04:11,639 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 13:04:11,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:04:11,640 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-12-13 13:04:11,643 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:04:11,644 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 13:04:11,672 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 13:04:11,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,720 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-12-13 13:04:11,720 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:04:11,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 466 events. 82/466 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2080 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-12-13 13:04:11,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,725 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:04:11,725 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-12-13 13:04:11,762 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-12-13 13:04:11,762 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 13:04:11,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 466 events. 82/466 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2080 event pairs, 0 based on Foata normal form. 0/375 useless extension candidates. Maximal degree in co-relation 286. Up to 12 conditions per place. [2022-12-13 13:04:11,778 INFO L119 LiptonReduction]: Number of co-enabled transitions 37204 [2022-12-13 13:04:14,027 INFO L134 LiptonReduction]: Checked pairs total: 60633 [2022-12-13 13:04:14,028 INFO L136 LiptonReduction]: Total number of compositions: 214 [2022-12-13 13:04:14,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:04:14,031 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;@8c75bd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:04:14,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 13:04:14,034 INFO L130 PetriNetUnfolder]: 8/28 cut-off events. [2022-12-13 13:04:14,034 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:14,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:14,034 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:14,034 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:14,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:14,035 INFO L85 PathProgramCache]: Analyzing trace with hash -804557223, now seen corresponding path program 1 times [2022-12-13 13:04:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:14,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123310012] [2022-12-13 13:04:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123310012] [2022-12-13 13:04:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123310012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:14,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:14,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:04:14,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62697557] [2022-12-13 13:04:14,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:14,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:14,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:14,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:14,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 487 [2022-12-13 13:04:14,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 105 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:14,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:14,073 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 487 [2022-12-13 13:04:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:15,277 INFO L130 PetriNetUnfolder]: 12861/19997 cut-off events. [2022-12-13 13:04:15,278 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-12-13 13:04:15,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38334 conditions, 19997 events. 12861/19997 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 131915 event pairs, 10970 based on Foata normal form. 3366/19606 useless extension candidates. Maximal degree in co-relation 15511. Up to 18227 conditions per place. [2022-12-13 13:04:15,360 INFO L137 encePairwiseOnDemand]: 454/487 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-12-13 13:04:15,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 296 flow [2022-12-13 13:04:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2022-12-13 13:04:15,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5222450376454483 [2022-12-13 13:04:15,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2022-12-13 13:04:15,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2022-12-13 13:04:15,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:15,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2022-12-13 13:04:15,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:15,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:15,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:15,371 INFO L175 Difference]: Start difference. First operand has 71 places, 105 transitions, 228 flow. Second operand 3 states and 763 transitions. [2022-12-13 13:04:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 296 flow [2022-12-13 13:04:15,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:04:15,374 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 180 flow [2022-12-13 13:04:15,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2022-12-13 13:04:15,376 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-12-13 13:04:15,376 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 180 flow [2022-12-13 13:04:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:15,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:15,377 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:04:15,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1943291571, now seen corresponding path program 1 times [2022-12-13 13:04:15,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:15,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110646803] [2022-12-13 13:04:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:15,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110646803] [2022-12-13 13:04:15,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110646803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:15,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814825137] [2022-12-13 13:04:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:15,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:15,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:15,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:04:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:04:15,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:15,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:04:15,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814825137] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:15,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:04:15,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 13:04:15,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861115221] [2022-12-13 13:04:15,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:15,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:15,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:15,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:15,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:15,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 487 [2022-12-13 13:04:15,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:15,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:15,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 487 [2022-12-13 13:04:15,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:16,690 INFO L130 PetriNetUnfolder]: 12636/20032 cut-off events. [2022-12-13 13:04:16,690 INFO L131 PetriNetUnfolder]: For 100/100 co-relation queries the response was YES. [2022-12-13 13:04:16,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38382 conditions, 20032 events. 12636/20032 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 137530 event pairs, 5190 based on Foata normal form. 0/16277 useless extension candidates. Maximal degree in co-relation 38369. Up to 18191 conditions per place. [2022-12-13 13:04:16,761 INFO L137 encePairwiseOnDemand]: 484/487 looper letters, 81 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2022-12-13 13:04:16,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 386 flow [2022-12-13 13:04:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-12-13 13:04:16,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5147159479808351 [2022-12-13 13:04:16,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-12-13 13:04:16,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-12-13 13:04:16,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:16,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-12-13 13:04:16,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:16,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:16,766 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 487.0) internal successors, (1948), 4 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:16,767 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 180 flow. Second operand 3 states and 752 transitions. [2022-12-13 13:04:16,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 386 flow [2022-12-13 13:04:16,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:16,768 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 188 flow [2022-12-13 13:04:16,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=77} [2022-12-13 13:04:16,769 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-12-13 13:04:16,769 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 188 flow [2022-12-13 13:04:16,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:16,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:16,770 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:16,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:04:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:16,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1888610182, now seen corresponding path program 1 times [2022-12-13 13:04:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681400972] [2022-12-13 13:04:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:17,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:17,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681400972] [2022-12-13 13:04:17,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681400972] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:17,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433742498] [2022-12-13 13:04:17,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:17,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:17,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:17,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:17,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:04:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:17,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:04:17,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:17,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:17,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433742498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:17,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:17,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:04:17,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719974830] [2022-12-13 13:04:17,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:04:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:04:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:04:17,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 487 [2022-12-13 13:04:17,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 77 transitions, 188 flow. Second operand has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:17,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:17,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 487 [2022-12-13 13:04:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:18,494 INFO L130 PetriNetUnfolder]: 12906/20015 cut-off events. [2022-12-13 13:04:18,495 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2022-12-13 13:04:18,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38979 conditions, 20015 events. 12906/20015 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 131826 event pairs, 10970 based on Foata normal form. 3/16544 useless extension candidates. Maximal degree in co-relation 38951. Up to 18211 conditions per place. [2022-12-13 13:04:18,566 INFO L137 encePairwiseOnDemand]: 484/487 looper letters, 62 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2022-12-13 13:04:18,566 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 334 flow [2022-12-13 13:04:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1401 transitions. [2022-12-13 13:04:18,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4794661190965092 [2022-12-13 13:04:18,569 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1401 transitions. [2022-12-13 13:04:18,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1401 transitions. [2022-12-13 13:04:18,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:18,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1401 transitions. [2022-12-13 13:04:18,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 233.5) internal successors, (1401), 6 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:18,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:18,574 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:18,574 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 188 flow. Second operand 6 states and 1401 transitions. [2022-12-13 13:04:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 334 flow [2022-12-13 13:04:18,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:18,576 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 222 flow [2022-12-13 13:04:18,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=222, PETRI_PLACES=83, PETRI_TRANSITIONS=80} [2022-12-13 13:04:18,576 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2022-12-13 13:04:18,577 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 222 flow [2022-12-13 13:04:18,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 224.14285714285714) internal successors, (1569), 7 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:18,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:18,577 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:18,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 13:04:18,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:18,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:18,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1797428512, now seen corresponding path program 2 times [2022-12-13 13:04:18,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:18,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505886605] [2022-12-13 13:04:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:18,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:18,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505886605] [2022-12-13 13:04:18,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505886605] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:18,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463373476] [2022-12-13 13:04:18,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:04:18,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:18,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:18,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:18,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:04:18,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:04:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:04:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:04:18,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 13:04:18,968 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:04:18,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:04:18,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 13:04:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:04:19,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:04:19,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463373476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:19,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:04:19,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 13:04:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886548560] [2022-12-13 13:04:19,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:19,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:04:19,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:19,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:04:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:04:19,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 487 [2022-12-13 13:04:19,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:19,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:19,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 487 [2022-12-13 13:04:19,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:21,082 INFO L130 PetriNetUnfolder]: 17128/26896 cut-off events. [2022-12-13 13:04:21,082 INFO L131 PetriNetUnfolder]: For 1099/1099 co-relation queries the response was YES. [2022-12-13 13:04:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52990 conditions, 26896 events. 17128/26896 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 192858 event pairs, 2228 based on Foata normal form. 0/21977 useless extension candidates. Maximal degree in co-relation 52954. Up to 17952 conditions per place. [2022-12-13 13:04:21,209 INFO L137 encePairwiseOnDemand]: 479/487 looper letters, 171 selfloop transitions, 14 changer transitions 0/198 dead transitions. [2022-12-13 13:04:21,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 198 transitions, 862 flow [2022-12-13 13:04:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:04:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:04:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1452 transitions. [2022-12-13 13:04:21,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49691991786447637 [2022-12-13 13:04:21,213 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1452 transitions. [2022-12-13 13:04:21,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1452 transitions. [2022-12-13 13:04:21,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:21,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1452 transitions. [2022-12-13 13:04:21,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 242.0) internal successors, (1452), 6 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,221 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 487.0) internal successors, (3409), 7 states have internal predecessors, (3409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,221 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 222 flow. Second operand 6 states and 1452 transitions. [2022-12-13 13:04:21,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 198 transitions, 862 flow [2022-12-13 13:04:21,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 848 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:04:21,225 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 295 flow [2022-12-13 13:04:21,225 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2022-12-13 13:04:21,225 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2022-12-13 13:04:21,226 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 295 flow [2022-12-13 13:04:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 213.66666666666666) internal successors, (1282), 6 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,226 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:21,226 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:21,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 13:04:21,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 13:04:21,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:21,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:21,429 INFO L85 PathProgramCache]: Analyzing trace with hash 827102871, now seen corresponding path program 1 times [2022-12-13 13:04:21,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:21,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021484284] [2022-12-13 13:04:21,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:21,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:04:21,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:21,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021484284] [2022-12-13 13:04:21,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021484284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:21,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41020280] [2022-12-13 13:04:21,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:21,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:21,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:21,496 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:21,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:04:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:21,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:04:21,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:04:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:21,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41020280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:04:21,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:04:21,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-12-13 13:04:21,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674404779] [2022-12-13 13:04:21,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:04:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:04:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:21,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:04:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:04:21,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 487 [2022-12-13 13:04:21,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 295 flow. Second operand has 14 states, 14 states have (on average 220.85714285714286) internal successors, (3092), 14 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:21,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:21,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 487 [2022-12-13 13:04:21,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:23,736 INFO L130 PetriNetUnfolder]: 17232/27247 cut-off events. [2022-12-13 13:04:23,737 INFO L131 PetriNetUnfolder]: For 5044/5044 co-relation queries the response was YES. [2022-12-13 13:04:23,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58991 conditions, 27247 events. 17232/27247 cut-off events. For 5044/5044 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 198118 event pairs, 212 based on Foata normal form. 36/23836 useless extension candidates. Maximal degree in co-relation 58932. Up to 24122 conditions per place. [2022-12-13 13:04:23,837 INFO L137 encePairwiseOnDemand]: 482/487 looper letters, 131 selfloop transitions, 14 changer transitions 0/158 dead transitions. [2022-12-13 13:04:23,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 783 flow [2022-12-13 13:04:23,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:04:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:04:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3200 transitions. [2022-12-13 13:04:23,842 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46934584922264594 [2022-12-13 13:04:23,842 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3200 transitions. [2022-12-13 13:04:23,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3200 transitions. [2022-12-13 13:04:23,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:23,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3200 transitions. [2022-12-13 13:04:23,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 228.57142857142858) internal successors, (3200), 14 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:23,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 487.0) internal successors, (7305), 15 states have internal predecessors, (7305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:23,854 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 487.0) internal successors, (7305), 15 states have internal predecessors, (7305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:23,854 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 295 flow. Second operand 14 states and 3200 transitions. [2022-12-13 13:04:23,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 783 flow [2022-12-13 13:04:23,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 783 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:04:23,865 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 365 flow [2022-12-13 13:04:23,865 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=487, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=365, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2022-12-13 13:04:23,865 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2022-12-13 13:04:23,866 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 365 flow [2022-12-13 13:04:23,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 220.85714285714286) internal successors, (3092), 14 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:23,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:23,867 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 13:04:23,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:04:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:24,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 13:04:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:24,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1746993840, now seen corresponding path program 1 times [2022-12-13 13:04:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:24,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243901343] [2022-12-13 13:04:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:24,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:04:24,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:04:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:04:24,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:04:24,131 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:04:24,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 13:04:24,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 13:04:24,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 13:04:24,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 13:04:24,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 13:04:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:04:24,132 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-12-13 13:04:24,132 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:04:24,132 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 13:04:24,160 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:04:24,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,260 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-12-13 13:04:24,260 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:04:24,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 681 events. 120/681 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3314 event pairs, 1 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 474. Up to 16 conditions per place. [2022-12-13 13:04:24,267 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,273 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:04:24,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-12-13 13:04:24,339 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-12-13 13:04:24,339 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 13:04:24,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 681 events. 120/681 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3314 event pairs, 1 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 474. Up to 16 conditions per place. [2022-12-13 13:04:24,364 INFO L119 LiptonReduction]: Number of co-enabled transitions 71568 [2022-12-13 13:04:27,023 INFO L134 LiptonReduction]: Checked pairs total: 121604 [2022-12-13 13:04:27,023 INFO L136 LiptonReduction]: Total number of compositions: 272 [2022-12-13 13:04:27,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:04:27,024 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;@8c75bd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:04:27,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 13:04:27,026 INFO L130 PetriNetUnfolder]: 9/31 cut-off events. [2022-12-13 13:04:27,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:04:27,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:27,026 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:27,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:04:27,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash 369363234, now seen corresponding path program 1 times [2022-12-13 13:04:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:27,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493606642] [2022-12-13 13:04:27,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:27,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:27,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493606642] [2022-12-13 13:04:27,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493606642] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:27,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:04:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:04:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939040849] [2022-12-13 13:04:27,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:04:27,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 618 [2022-12-13 13:04:27,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 141 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:27,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:27,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 618 [2022-12-13 13:04:27,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:04:52,014 INFO L130 PetriNetUnfolder]: 325231/444946 cut-off events. [2022-12-13 13:04:52,014 INFO L131 PetriNetUnfolder]: For 4405/4405 co-relation queries the response was YES. [2022-12-13 13:04:52,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865590 conditions, 444946 events. 325231/444946 cut-off events. For 4405/4405 co-relation queries the response was YES. Maximal size of possible extension queue 10024. Compared 3336292 event pairs, 287234 based on Foata normal form. 82222/444185 useless extension candidates. Maximal degree in co-relation 100276. Up to 418275 conditions per place. [2022-12-13 13:04:54,210 INFO L137 encePairwiseOnDemand]: 573/618 looper letters, 80 selfloop transitions, 2 changer transitions 0/99 dead transitions. [2022-12-13 13:04:54,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 99 transitions, 392 flow [2022-12-13 13:04:54,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:04:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:04:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 968 transitions. [2022-12-13 13:04:54,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5221143473570659 [2022-12-13 13:04:54,213 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 968 transitions. [2022-12-13 13:04:54,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 968 transitions. [2022-12-13 13:04:54,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:04:54,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 968 transitions. [2022-12-13 13:04:54,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.6666666666667) internal successors, (968), 3 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:54,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:54,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:54,218 INFO L175 Difference]: Start difference. First operand has 94 places, 141 transitions, 312 flow. Second operand 3 states and 968 transitions. [2022-12-13 13:04:54,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 99 transitions, 392 flow [2022-12-13 13:04:54,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 99 transitions, 392 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:04:54,221 INFO L231 Difference]: Finished difference. Result has 96 places, 99 transitions, 238 flow [2022-12-13 13:04:54,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=96, PETRI_TRANSITIONS=99} [2022-12-13 13:04:54,221 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2022-12-13 13:04:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 99 transitions, 238 flow [2022-12-13 13:04:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:54,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:04:54,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:04:54,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:04:54,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:04:54,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:04:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1147941827, now seen corresponding path program 1 times [2022-12-13 13:04:54,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:04:54,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744434805] [2022-12-13 13:04:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:04:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:04:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:04:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744434805] [2022-12-13 13:04:54,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744434805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:04:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032558353] [2022-12-13 13:04:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:04:54,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:04:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:04:54,250 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:04:54,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 13:04:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:04:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 13:04:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:04:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:04:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:04:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032558353] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:04:54,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:04:54,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 13:04:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787276379] [2022-12-13 13:04:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:04:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:04:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:04:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:04:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:04:54,342 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 618 [2022-12-13 13:04:54,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 99 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:04:54,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:04:54,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 618 [2022-12-13 13:04:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:17,575 INFO L130 PetriNetUnfolder]: 324927/445635 cut-off events. [2022-12-13 13:05:17,575 INFO L131 PetriNetUnfolder]: For 4364/4364 co-relation queries the response was YES. [2022-12-13 13:05:18,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 866613 conditions, 445635 events. 324927/445635 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 9991. Compared 3355101 event pairs, 188226 based on Foata normal form. 0/362359 useless extension candidates. Maximal degree in co-relation 866599. Up to 418478 conditions per place. [2022-12-13 13:05:19,576 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 99 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2022-12-13 13:05:19,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 118 transitions, 478 flow [2022-12-13 13:05:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:05:19,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:05:19,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 944 transitions. [2022-12-13 13:05:19,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5091693635382956 [2022-12-13 13:05:19,579 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 944 transitions. [2022-12-13 13:05:19,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 944 transitions. [2022-12-13 13:05:19,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:19,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 944 transitions. [2022-12-13 13:05:19,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 314.6666666666667) internal successors, (944), 3 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:19,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:19,583 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 618.0) internal successors, (2472), 4 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:19,583 INFO L175 Difference]: Start difference. First operand has 96 places, 99 transitions, 238 flow. Second operand 3 states and 944 transitions. [2022-12-13 13:05:19,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 118 transitions, 478 flow [2022-12-13 13:05:19,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 118 transitions, 474 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 13:05:19,586 INFO L231 Difference]: Finished difference. Result has 98 places, 100 transitions, 246 flow [2022-12-13 13:05:19,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=98, PETRI_TRANSITIONS=100} [2022-12-13 13:05:19,586 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 4 predicate places. [2022-12-13 13:05:19,586 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 100 transitions, 246 flow [2022-12-13 13:05:19,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:19,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:19,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:19,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 13:05:19,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 13:05:19,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:05:19,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:19,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1154361702, now seen corresponding path program 1 times [2022-12-13 13:05:19,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:19,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100079131] [2022-12-13 13:05:19,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:19,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:19,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100079131] [2022-12-13 13:05:19,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100079131] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:19,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184668681] [2022-12-13 13:05:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:19,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:19,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:19,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:19,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 13:05:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:19,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:05:19,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:05:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:19,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184668681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:05:19,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:05:19,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 13:05:19,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049301920] [2022-12-13 13:05:19,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:05:19,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:05:19,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:19,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:05:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:05:19,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 618 [2022-12-13 13:05:19,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 100 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:19,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:19,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 618 [2022-12-13 13:05:19,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:05:46,298 INFO L130 PetriNetUnfolder]: 327245/446931 cut-off events. [2022-12-13 13:05:46,298 INFO L131 PetriNetUnfolder]: For 14685/14685 co-relation queries the response was YES. [2022-12-13 13:05:47,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878197 conditions, 446931 events. 327245/446931 cut-off events. For 14685/14685 co-relation queries the response was YES. Maximal size of possible extension queue 9951. Compared 3326421 event pairs, 287234 based on Foata normal form. 3/368555 useless extension candidates. Maximal degree in co-relation 878168. Up to 418497 conditions per place. [2022-12-13 13:05:48,528 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 81 selfloop transitions, 5 changer transitions 0/103 dead transitions. [2022-12-13 13:05:48,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 103 transitions, 430 flow [2022-12-13 13:05:48,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:05:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:05:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1768 transitions. [2022-12-13 13:05:48,532 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47680690399137 [2022-12-13 13:05:48,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1768 transitions. [2022-12-13 13:05:48,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1768 transitions. [2022-12-13 13:05:48,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:05:48,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1768 transitions. [2022-12-13 13:05:48,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 294.6666666666667) internal successors, (1768), 6 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:48,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:48,539 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:48,539 INFO L175 Difference]: Start difference. First operand has 98 places, 100 transitions, 246 flow. Second operand 6 states and 1768 transitions. [2022-12-13 13:05:48,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 103 transitions, 430 flow [2022-12-13 13:05:48,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 103 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:05:48,551 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 280 flow [2022-12-13 13:05:48,551 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2022-12-13 13:05:48,552 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places. [2022-12-13 13:05:48,552 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 280 flow [2022-12-13 13:05:48,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 282.0) internal successors, (1974), 7 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:48,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:05:48,553 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:05:48,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 13:05:48,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 13:05:48,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:05:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:05:48,755 INFO L85 PathProgramCache]: Analyzing trace with hash 348468037, now seen corresponding path program 2 times [2022-12-13 13:05:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:05:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735327203] [2022-12-13 13:05:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:05:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:05:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:05:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:05:48,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:05:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735327203] [2022-12-13 13:05:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735327203] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:05:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893406539] [2022-12-13 13:05:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:05:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:05:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:05:48,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:05:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 13:05:48,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:05:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:05:48,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 13:05:48,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:05:48,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 13:05:48,937 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:05:48,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:05:48,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 13:05:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:05:48,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:05:48,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893406539] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:05:48,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:05:48,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-12-13 13:05:48,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703357895] [2022-12-13 13:05:48,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:05:48,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:05:48,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:05:48,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:05:48,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:05:49,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 618 [2022-12-13 13:05:49,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:05:49,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:05:49,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 618 [2022-12-13 13:05:49,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:06:22,353 INFO L130 PetriNetUnfolder]: 402810/559486 cut-off events. [2022-12-13 13:06:22,353 INFO L131 PetriNetUnfolder]: For 19496/19496 co-relation queries the response was YES. [2022-12-13 13:06:23,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104030 conditions, 559486 events. 402810/559486 cut-off events. For 19496/19496 co-relation queries the response was YES. Maximal size of possible extension queue 12508. Compared 4492721 event pairs, 59739 based on Foata normal form. 0/459673 useless extension candidates. Maximal degree in co-relation 1103993. Up to 420594 conditions per place. [2022-12-13 13:06:25,113 INFO L137 encePairwiseOnDemand]: 609/618 looper letters, 240 selfloop transitions, 18 changer transitions 0/275 dead transitions. [2022-12-13 13:06:25,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 275 transitions, 1194 flow [2022-12-13 13:06:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:06:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:06:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1861 transitions. [2022-12-13 13:06:25,117 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5018878101402373 [2022-12-13 13:06:25,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1861 transitions. [2022-12-13 13:06:25,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1861 transitions. [2022-12-13 13:06:25,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:06:25,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1861 transitions. [2022-12-13 13:06:25,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 310.1666666666667) internal successors, (1861), 6 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:25,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:25,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:25,124 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 280 flow. Second operand 6 states and 1861 transitions. [2022-12-13 13:06:25,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 275 transitions, 1194 flow [2022-12-13 13:06:25,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 275 transitions, 1180 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 13:06:25,142 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 375 flow [2022-12-13 13:06:25,142 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2022-12-13 13:06:25,143 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 19 predicate places. [2022-12-13 13:06:25,143 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 375 flow [2022-12-13 13:06:25,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 269.5) internal successors, (1617), 6 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:25,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:06:25,143 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:06:25,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 13:06:25,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 13:06:25,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:06:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:06:25,346 INFO L85 PathProgramCache]: Analyzing trace with hash 92406162, now seen corresponding path program 1 times [2022-12-13 13:06:25,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:06:25,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316029543] [2022-12-13 13:06:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:25,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:06:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 13:06:25,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:06:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316029543] [2022-12-13 13:06:25,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316029543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:06:25,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905219513] [2022-12-13 13:06:25,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:06:25,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:06:25,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:06:25,382 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:06:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 13:06:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:06:25,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:06:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:06:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:06:25,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:06:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:06:25,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905219513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:06:25,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:06:25,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-12-13 13:06:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384030801] [2022-12-13 13:06:25,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:06:25,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:06:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:06:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:06:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:06:25,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 618 [2022-12-13 13:06:25,553 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 375 flow. Second operand has 14 states, 14 states have (on average 278.85714285714283) internal successors, (3904), 14 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:06:25,553 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:06:25,553 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 618 [2022-12-13 13:06:25,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:07:02,178 INFO L130 PetriNetUnfolder]: 413455/566950 cut-off events. [2022-12-13 13:07:02,178 INFO L131 PetriNetUnfolder]: For 97405/97405 co-relation queries the response was YES. [2022-12-13 13:07:03,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1208349 conditions, 566950 events. 413455/566950 cut-off events. For 97405/97405 co-relation queries the response was YES. Maximal size of possible extension queue 12956. Compared 4425229 event pairs, 112742 based on Foata normal form. 34/486924 useless extension candidates. Maximal degree in co-relation 1208289. Up to 538901 conditions per place. [2022-12-13 13:07:05,506 INFO L137 encePairwiseOnDemand]: 613/618 looper letters, 153 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2022-12-13 13:07:05,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 184 transitions, 907 flow [2022-12-13 13:07:05,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:07:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 13:07:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 4030 transitions. [2022-12-13 13:07:05,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46578825705039295 [2022-12-13 13:07:05,512 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 4030 transitions. [2022-12-13 13:07:05,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 4030 transitions. [2022-12-13 13:07:05,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:07:05,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 4030 transitions. [2022-12-13 13:07:05,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 287.85714285714283) internal successors, (4030), 14 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:05,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 618.0) internal successors, (9270), 15 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:05,524 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 618.0) internal successors, (9270), 15 states have internal predecessors, (9270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:05,524 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 375 flow. Second operand 14 states and 4030 transitions. [2022-12-13 13:07:05,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 184 transitions, 907 flow [2022-12-13 13:07:05,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 184 transitions, 907 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 13:07:05,937 INFO L231 Difference]: Finished difference. Result has 127 places, 126 transitions, 451 flow [2022-12-13 13:07:05,937 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=127, PETRI_TRANSITIONS=126} [2022-12-13 13:07:05,938 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 33 predicate places. [2022-12-13 13:07:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 126 transitions, 451 flow [2022-12-13 13:07:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 278.85714285714283) internal successors, (3904), 14 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:07:05,938 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:07:05,938 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:07:05,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 13:07:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 13:07:06,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:07:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:07:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1656754072, now seen corresponding path program 1 times [2022-12-13 13:07:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:07:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377430055] [2022-12-13 13:07:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:07:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:06,327 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 13:07:06,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:07:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377430055] [2022-12-13 13:07:06,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377430055] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:07:06,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005188403] [2022-12-13 13:07:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:07:06,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:07:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:06,329 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:07:06,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 13:07:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:07:06,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:07:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:07:06,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-12-13 13:07:06,464 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 13:07:06,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 13:07:06,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 13:07:06,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 13:07:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 13:07:06,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:07:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 13:07:16,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005188403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:07:16,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:07:16,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-13 13:07:16,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747173932] [2022-12-13 13:07:16,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:07:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:07:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:07:16,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:07:16,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=4, NotChecked=0, Total=132 [2022-12-13 13:07:18,663 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 [1] [2022-12-13 13:07:20,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:22,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:24,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:26,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:28,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:30,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:32,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:34,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:36,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:38,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:40,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:42,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:44,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:46,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:48,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:50,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:52,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:54,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:56,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:07:58,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:00,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:02,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:04,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:06,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:08,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:10,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:12,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:14,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:16,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:18,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:20,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:22,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:24,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:26,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:08:26,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 618 [2022-12-13 13:08:26,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 126 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:08:26,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:08:26,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 618 [2022-12-13 13:08:26,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:13,026 INFO L130 PetriNetUnfolder]: 495373/682769 cut-off events. [2022-12-13 13:09:13,026 INFO L131 PetriNetUnfolder]: For 150173/150173 co-relation queries the response was YES. [2022-12-13 13:09:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1468098 conditions, 682769 events. 495373/682769 cut-off events. For 150173/150173 co-relation queries the response was YES. Maximal size of possible extension queue 15330. Compared 5478111 event pairs, 68987 based on Foata normal form. 0/588846 useless extension candidates. Maximal degree in co-relation 1468024. Up to 431791 conditions per place. [2022-12-13 13:09:17,196 INFO L137 encePairwiseOnDemand]: 604/618 looper letters, 303 selfloop transitions, 37 changer transitions 0/357 dead transitions. [2022-12-13 13:09:17,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 357 transitions, 1762 flow [2022-12-13 13:09:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:09:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 13:09:17,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1964 transitions. [2022-12-13 13:09:17,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45399907535829864 [2022-12-13 13:09:17,200 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1964 transitions. [2022-12-13 13:09:17,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1964 transitions. [2022-12-13 13:09:17,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:09:17,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1964 transitions. [2022-12-13 13:09:17,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 280.57142857142856) internal successors, (1964), 7 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:17,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 618.0) internal successors, (4944), 8 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:17,207 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 618.0) internal successors, (4944), 8 states have internal predecessors, (4944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:17,207 INFO L175 Difference]: Start difference. First operand has 127 places, 126 transitions, 451 flow. Second operand 7 states and 1964 transitions. [2022-12-13 13:09:17,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 357 transitions, 1762 flow [2022-12-13 13:09:19,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 357 transitions, 1685 flow, removed 28 selfloop flow, removed 10 redundant places. [2022-12-13 13:09:19,347 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 635 flow [2022-12-13 13:09:19,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=635, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2022-12-13 13:09:19,347 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places. [2022-12-13 13:09:19,347 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 635 flow [2022-12-13 13:09:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 238.91666666666666) internal successors, (2867), 12 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:19,348 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:19,348 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:19,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 13:09:19,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 13:09:19,550 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:09:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash -846970111, now seen corresponding path program 1 times [2022-12-13 13:09:19,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937144714] [2022-12-13 13:09:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:19,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:09:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937144714] [2022-12-13 13:09:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937144714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:09:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535618408] [2022-12-13 13:09:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:09:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:09:19,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:09:19,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 13:09:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:19,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:09:19,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:09:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:09:19,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:09:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 13:09:19,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535618408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:09:19,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:09:19,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 13:09:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27582388] [2022-12-13 13:09:19,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:09:19,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:09:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:09:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:09:19,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 618 [2022-12-13 13:09:19,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 635 flow. Second operand has 9 states, 9 states have (on average 282.77777777777777) internal successors, (2545), 9 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:19,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:19,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 618 [2022-12-13 13:09:19,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:09:27,153 INFO L130 PetriNetUnfolder]: 69127/102222 cut-off events. [2022-12-13 13:09:27,153 INFO L131 PetriNetUnfolder]: For 88413/88413 co-relation queries the response was YES. [2022-12-13 13:09:27,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276159 conditions, 102222 events. 69127/102222 cut-off events. For 88413/88413 co-relation queries the response was YES. Maximal size of possible extension queue 2768. Compared 785242 event pairs, 1486 based on Foata normal form. 8328/103136 useless extension candidates. Maximal degree in co-relation 264173. Up to 64744 conditions per place. [2022-12-13 13:09:27,757 INFO L137 encePairwiseOnDemand]: 615/618 looper letters, 217 selfloop transitions, 4 changer transitions 0/233 dead transitions. [2022-12-13 13:09:27,757 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 233 transitions, 1337 flow [2022-12-13 13:09:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:09:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:09:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1847 transitions. [2022-12-13 13:09:27,760 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4981121898597627 [2022-12-13 13:09:27,760 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1847 transitions. [2022-12-13 13:09:27,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1847 transitions. [2022-12-13 13:09:27,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:09:27,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1847 transitions. [2022-12-13 13:09:27,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 307.8333333333333) internal successors, (1847), 6 states have internal predecessors, (1847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:27,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:27,766 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 618.0) internal successors, (4326), 7 states have internal predecessors, (4326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:27,766 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 635 flow. Second operand 6 states and 1847 transitions. [2022-12-13 13:09:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 233 transitions, 1337 flow [2022-12-13 13:09:28,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 233 transitions, 1285 flow, removed 22 selfloop flow, removed 6 redundant places. [2022-12-13 13:09:28,025 INFO L231 Difference]: Finished difference. Result has 104 places, 100 transitions, 368 flow [2022-12-13 13:09:28,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=618, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=104, PETRI_TRANSITIONS=100} [2022-12-13 13:09:28,025 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 10 predicate places. [2022-12-13 13:09:28,025 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 100 transitions, 368 flow [2022-12-13 13:09:28,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 282.77777777777777) internal successors, (2545), 9 states have internal predecessors, (2545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:28,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:28,026 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:28,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-13 13:09:28,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_579ff9dd-c6e2-4e05-9026-a7562ff70e15/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 13:09:28,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 13:09:28,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:28,228 INFO L85 PathProgramCache]: Analyzing trace with hash 946798739, now seen corresponding path program 1 times [2022-12-13 13:09:28,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:28,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829113760] [2022-12-13 13:09:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:09:28,258 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 13:09:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 13:09:28,270 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 13:09:28,270 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 13:09:28,270 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 13:09:28,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:09:28,270 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:28,271 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 13:09:28,271 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 13:09:28,294 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 13:09:28,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,415 INFO L130 PetriNetUnfolder]: 170/964 cut-off events. [2022-12-13 13:09:28,415 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:09:28,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 964 events. 170/964 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4966 event pairs, 6 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 701. Up to 32 conditions per place. [2022-12-13 13:09:28,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:09:28,431 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 419 transitions, 882 flow [2022-12-13 13:09:28,546 INFO L130 PetriNetUnfolder]: 170/964 cut-off events. [2022-12-13 13:09:28,546 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 13:09:28,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 964 events. 170/964 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4966 event pairs, 6 based on Foata normal form. 0/785 useless extension candidates. Maximal degree in co-relation 701. Up to 32 conditions per place. [2022-12-13 13:09:28,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 116440 [2022-12-13 13:09:31,838 INFO L134 LiptonReduction]: Checked pairs total: 217438 [2022-12-13 13:09:31,838 INFO L136 LiptonReduction]: Total number of compositions: 327 [2022-12-13 13:09:31,839 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:09:31,839 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;@8c75bd9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:09:31,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 13:09:31,841 INFO L130 PetriNetUnfolder]: 9/29 cut-off events. [2022-12-13 13:09:31,841 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:09:31,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:09:31,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:09:31,841 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 13:09:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:31,841 INFO L85 PathProgramCache]: Analyzing trace with hash -585916975, now seen corresponding path program 1 times [2022-12-13 13:09:31,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:31,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109581070] [2022-12-13 13:09:31,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:31,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:09:31,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:31,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109581070] [2022-12-13 13:09:31,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109581070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:31,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:31,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:09:31,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241632542] [2022-12-13 13:09:31,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:31,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:09:31,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:31,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:09:31,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:09:31,865 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 746 [2022-12-13 13:09:31,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 174 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 341.0) internal successors, (1023), 3 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:09:31,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:09:31,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 746 [2022-12-13 13:09:31,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand