./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/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_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-4e7fbc6 [2022-11-23 02:45:43,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:45:43,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:45:44,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:45:44,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:45:44,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:45:44,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:45:44,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:45:44,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:45:44,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:45:44,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:45:44,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:45:44,057 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:45:44,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:45:44,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:45:44,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:45:44,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:45:44,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:45:44,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:45:44,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:45:44,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:45:44,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:45:44,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:45:44,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:45:44,098 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:45:44,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:45:44,099 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:45:44,100 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:45:44,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:45:44,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:45:44,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:45:44,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:45:44,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:45:44,114 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:45:44,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:45:44,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:45:44,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:45:44,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:45:44,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:45:44,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:45:44,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:45:44,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:45:44,168 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:45:44,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:45:44,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:45:44,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:45:44,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:45:44,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:45:44,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:45:44,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:45:44,172 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:45:44,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:45:44,174 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:45:44,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:45:44,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:45:44,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:45:44,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:45:44,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:45:44,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:45:44,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:45:44,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:45:44,177 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:45:44,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:45:44,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:45:44,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:45:44,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:45:44,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:45:44,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:45:44,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:45:44,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:45:44,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:45:44,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:45:44,181 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:45:44,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:45:44,181 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:45:44,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:45:44,182 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_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2022-11-23 02:45:44,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:45:44,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:45:44,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:45:44,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:45:44,526 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:45:44,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-11-23 02:45:48,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:45:48,604 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:45:48,605 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2022-11-23 02:45:48,625 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/data/98ffe544d/feb614f5718f4086a412b9efad609a0d/FLAGa8dcc0435 [2022-11-23 02:45:48,645 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/data/98ffe544d/feb614f5718f4086a412b9efad609a0d [2022-11-23 02:45:48,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:45:48,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:45:48,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:45:48,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:45:48,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:45:48,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:48" (1/1) ... [2022-11-23 02:45:48,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d37c6a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:48, skipping insertion in model container [2022-11-23 02:45:48,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:48" (1/1) ... [2022-11-23 02:45:48,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:45:48,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:45:49,338 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_fc50f131-9065-4b3c-97e3-0899fb87d6e8/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-11-23 02:45:49,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:45:49,388 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:45:49,428 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_fc50f131-9065-4b3c-97e3-0899fb87d6e8/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i[41323,41336] [2022-11-23 02:45:49,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:45:49,502 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:45:49,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49 WrapperNode [2022-11-23 02:45:49,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:45:49,505 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:45:49,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:45:49,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:45:49,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,578 INFO L138 Inliner]: procedures = 271, calls = 31, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 193 [2022-11-23 02:45:49,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:45:49,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:45:49,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:45:49,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:45:49,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:45:49,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:45:49,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:45:49,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:45:49,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (1/1) ... [2022-11-23 02:45:49,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:45:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:45:49,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:45:49,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:45:49,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:45:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 02:45:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:45:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-23 02:45:49,743 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-23 02:45:49,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:45:49,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:45:49,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:45:49,746 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:45:49,956 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:45:49,958 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:45:50,338 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:45:50,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:45:50,349 INFO L300 CfgBuilder]: Removed 25 assume(true) statements. [2022-11-23 02:45:50,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:50 BoogieIcfgContainer [2022-11-23 02:45:50,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:45:50,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:45:50,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:45:50,374 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:45:50,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:48" (1/3) ... [2022-11-23 02:45:50,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d86007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:50, skipping insertion in model container [2022-11-23 02:45:50,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:49" (2/3) ... [2022-11-23 02:45:50,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d86007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:50, skipping insertion in model container [2022-11-23 02:45:50,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:50" (3/3) ... [2022-11-23 02:45:50,378 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2022-11-23 02:45:50,389 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:45:50,405 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:45:50,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 02:45:50,406 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:45:50,531 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-23 02:45:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 200 transitions, 408 flow [2022-11-23 02:45:50,733 INFO L130 PetriNetUnfolder]: 49/284 cut-off events. [2022-11-23 02:45:50,733 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 02:45:50,744 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 1026 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. [2022-11-23 02:45:50,745 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 200 transitions, 408 flow [2022-11-23 02:45:50,753 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 195 transitions, 395 flow [2022-11-23 02:45:50,758 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:45:50,788 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 195 transitions, 395 flow [2022-11-23 02:45:50,801 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 195 transitions, 395 flow [2022-11-23 02:45:50,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 195 transitions, 395 flow [2022-11-23 02:45:50,919 INFO L130 PetriNetUnfolder]: 48/279 cut-off events. [2022-11-23 02:45:50,920 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:45:50,928 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 970 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. [2022-11-23 02:45:50,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 12780 [2022-11-23 02:45:55,657 INFO L134 LiptonReduction]: Checked pairs total: 17422 [2022-11-23 02:45:55,657 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-11-23 02:45:55,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:45:55,696 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;@425f1178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:45:55,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:45:55,708 INFO L130 PetriNetUnfolder]: 11/34 cut-off events. [2022-11-23 02:45:55,709 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:45:55,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:45:55,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:45:55,712 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)] === [2022-11-23 02:45:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:45:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash 870960255, now seen corresponding path program 1 times [2022-11-23 02:45:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:45:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099424843] [2022-11-23 02:45:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:45:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:45:56,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:45:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099424843] [2022-11-23 02:45:56,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099424843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:45:56,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:45:56,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:45:56,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212584233] [2022-11-23 02:45:56,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:45:56,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:45:56,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:45:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:45:56,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:45:56,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-11-23 02:45:56,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 70 transitions, 145 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) [2022-11-23 02:45:56,088 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:45:56,088 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-11-23 02:45:56,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:45:56,384 INFO L130 PetriNetUnfolder]: 327/698 cut-off events. [2022-11-23 02:45:56,384 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:45:56,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1314 conditions, 698 events. 327/698 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3383 event pairs, 256 based on Foata normal form. 159/726 useless extension candidates. Maximal degree in co-relation 1257. Up to 609 conditions per place. [2022-11-23 02:45:56,392 INFO L137 encePairwiseOnDemand]: 346/371 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2022-11-23 02:45:56,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 49 transitions, 181 flow [2022-11-23 02:45:56,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:45:56,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:45:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2022-11-23 02:45:56,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5004492362982929 [2022-11-23 02:45:56,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2022-11-23 02:45:56,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2022-11-23 02:45:56,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:45:56,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2022-11-23 02:45:56,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:56,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:56,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:56,452 INFO L175 Difference]: Start difference. First operand has 47 places, 70 transitions, 145 flow. Second operand 3 states and 557 transitions. [2022-11-23 02:45:56,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 49 transitions, 181 flow [2022-11-23 02:45:56,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 02:45:56,461 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 113 flow [2022-11-23 02:45:56,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-11-23 02:45:56,471 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2022-11-23 02:45:56,471 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 113 flow [2022-11-23 02:45:56,472 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) [2022-11-23 02:45:56,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:45:56,473 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:45:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:45:56,473 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)] === [2022-11-23 02:45:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:45:56,487 INFO L85 PathProgramCache]: Analyzing trace with hash 59532656, now seen corresponding path program 1 times [2022-11-23 02:45:56,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:45:56,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343726979] [2022-11-23 02:45:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:45:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:45:56,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:45:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343726979] [2022-11-23 02:45:56,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343726979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:45:56,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070369285] [2022-11-23 02:45:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:56,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:56,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:45:56,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:45:56,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:45:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:56,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:45:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:45:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:45:56,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:45:56,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070369285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:45:56,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:45:56,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 02:45:56,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257434506] [2022-11-23 02:45:56,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:45:56,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:45:56,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:45:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:45:56,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:45:56,821 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 371 [2022-11-23 02:45:56,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 113 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) [2022-11-23 02:45:56,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:45:56,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 371 [2022-11-23 02:45:56,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:45:57,107 INFO L130 PetriNetUnfolder]: 309/706 cut-off events. [2022-11-23 02:45:57,107 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:45:57,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1319 conditions, 706 events. 309/706 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3730 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 1307. Up to 565 conditions per place. [2022-11-23 02:45:57,113 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 55 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-23 02:45:57,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 67 transitions, 263 flow [2022-11-23 02:45:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:45:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:45:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2022-11-23 02:45:57,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2022-11-23 02:45:57,118 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2022-11-23 02:45:57,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2022-11-23 02:45:57,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:45:57,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2022-11-23 02:45:57,121 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) [2022-11-23 02:45:57,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:57,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 371.0) internal successors, (1484), 4 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:57,127 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 113 flow. Second operand 3 states and 552 transitions. [2022-11-23 02:45:57,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 67 transitions, 263 flow [2022-11-23 02:45:57,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 67 transitions, 259 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:45:57,133 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 117 flow [2022-11-23 02:45:57,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2022-11-23 02:45:57,135 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2022-11-23 02:45:57,135 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 117 flow [2022-11-23 02:45:57,136 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) [2022-11-23 02:45:57,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:45:57,137 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-23 02:45:57,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:45:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:57,345 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)] === [2022-11-23 02:45:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:45:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 76652383, now seen corresponding path program 1 times [2022-11-23 02:45:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:45:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593782736] [2022-11-23 02:45:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:45:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:57,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:45:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593782736] [2022-11-23 02:45:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593782736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:45:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737617600] [2022-11-23 02:45:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:45:57,511 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:45:57,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:45:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:57,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:45:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:45:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:57,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:45:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:57,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737617600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:45:57,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:45:57,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 02:45:57,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678374138] [2022-11-23 02:45:57,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:45:57,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:45:57,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:45:57,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:45:57,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:45:57,765 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-23 02:45:57,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 117 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) [2022-11-23 02:45:57,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:45:57,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-23 02:45:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:45:58,037 INFO L130 PetriNetUnfolder]: 323/693 cut-off events. [2022-11-23 02:45:58,037 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-23 02:45:58,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1352 conditions, 693 events. 323/693 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3272 event pairs, 256 based on Foata normal form. 3/584 useless extension candidates. Maximal degree in co-relation 1325. Up to 588 conditions per place. [2022-11-23 02:45:58,043 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2022-11-23 02:45:58,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 213 flow [2022-11-23 02:45:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:45:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:45:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1029 transitions. [2022-11-23 02:45:58,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2022-11-23 02:45:58,047 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1029 transitions. [2022-11-23 02:45:58,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1029 transitions. [2022-11-23 02:45:58,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:45:58,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1029 transitions. [2022-11-23 02:45:58,052 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) [2022-11-23 02:45:58,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:58,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 371.0) internal successors, (2597), 7 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:58,059 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 117 flow. Second operand 6 states and 1029 transitions. [2022-11-23 02:45:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 213 flow [2022-11-23 02:45:58,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:45:58,062 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 149 flow [2022-11-23 02:45:58,062 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2022-11-23 02:45:58,063 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2022-11-23 02:45:58,064 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 149 flow [2022-11-23 02:45:58,065 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) [2022-11-23 02:45:58,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:45:58,065 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-23 02:45:58,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:45:58,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:58,272 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)] === [2022-11-23 02:45:58,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:45:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1430665902, now seen corresponding path program 2 times [2022-11-23 02:45:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:45:58,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83394409] [2022-11-23 02:45:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:58,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:45:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:45:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:45:58,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83394409] [2022-11-23 02:45:58,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83394409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:45:58,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869113355] [2022-11-23 02:45:58,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:45:58,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:45:58,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:45:58,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:45:58,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:45:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:45:58,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:45:58,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:45:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:58,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:45:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:45:58,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869113355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:45:58,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:45:58,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 02:45:58,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438830102] [2022-11-23 02:45:58,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:45:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 02:45:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:45:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 02:45:58,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-23 02:45:58,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 371 [2022-11-23 02:45:58,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 149 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) [2022-11-23 02:45:58,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:45:58,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 371 [2022-11-23 02:45:58,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:45:58,998 INFO L130 PetriNetUnfolder]: 323/699 cut-off events. [2022-11-23 02:45:58,998 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-23 02:45:59,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1373 conditions, 699 events. 323/699 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3293 event pairs, 256 based on Foata normal form. 6/593 useless extension candidates. Maximal degree in co-relation 1314. Up to 588 conditions per place. [2022-11-23 02:45:59,003 INFO L137 encePairwiseOnDemand]: 368/371 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2022-11-23 02:45:59,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 58 transitions, 281 flow [2022-11-23 02:45:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:45:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:45:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2022 transitions. [2022-11-23 02:45:59,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45417789757412397 [2022-11-23 02:45:59,010 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2022 transitions. [2022-11-23 02:45:59,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2022 transitions. [2022-11-23 02:45:59,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:45:59,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2022 transitions. [2022-11-23 02:45:59,017 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) [2022-11-23 02:45:59,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:59,028 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 371.0) internal successors, (4823), 13 states have internal predecessors, (4823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:45:59,028 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 149 flow. Second operand 12 states and 2022 transitions. [2022-11-23 02:45:59,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 58 transitions, 281 flow [2022-11-23 02:45:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 267 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 02:45:59,031 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 219 flow [2022-11-23 02:45:59,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=371, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=219, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2022-11-23 02:45:59,033 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 26 predicate places. [2022-11-23 02:45:59,033 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 219 flow [2022-11-23 02:45:59,034 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) [2022-11-23 02:45:59,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:45:59,034 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-23 02:45:59,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:45:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:45:59,246 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)] === [2022-11-23 02:45:59,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:45:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -783528690, now seen corresponding path program 3 times [2022-11-23 02:45:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:45:59,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342848836] [2022-11-23 02:45:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:45:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:45:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:45:59,297 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 02:45:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:45:59,368 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 02:45:59,369 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 02:45:59,370 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-23 02:45:59,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-23 02:45:59,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-23 02:45:59,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-23 02:45:59,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 02:45:59,375 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2022-11-23 02:45:59,379 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 02:45:59,379 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 02:45:59,431 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:45:59,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,519 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-11-23 02:45:59,519 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 02:45:59,525 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 2079 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. [2022-11-23 02:45:59,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,531 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:45:59,532 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,532 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 273 transitions, 564 flow [2022-11-23 02:45:59,616 INFO L130 PetriNetUnfolder]: 82/466 cut-off events. [2022-11-23 02:45:59,616 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 02:45:59,622 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 2079 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. [2022-11-23 02:45:59,650 INFO L119 LiptonReduction]: Number of co-enabled transitions 37204 [2022-11-23 02:46:05,283 INFO L134 LiptonReduction]: Checked pairs total: 57718 [2022-11-23 02:46:05,283 INFO L136 LiptonReduction]: Total number of compositions: 235 [2022-11-23 02:46:05,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:46:05,299 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@425f1178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:46:05,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-23 02:46:05,306 INFO L130 PetriNetUnfolder]: 11/33 cut-off events. [2022-11-23 02:46:05,307 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:46:05,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:05,308 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:05,309 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)] === [2022-11-23 02:46:05,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:05,309 INFO L85 PathProgramCache]: Analyzing trace with hash 637266584, now seen corresponding path program 1 times [2022-11-23 02:46:05,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:05,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499556024] [2022-11-23 02:46:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:05,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:05,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499556024] [2022-11-23 02:46:05,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499556024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:46:05,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:46:05,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:46:05,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314893975] [2022-11-23 02:46:05,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:46:05,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:46:05,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:05,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:46:05,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:46:05,389 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 508 [2022-11-23 02:46:05,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 107 transitions, 232 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) [2022-11-23 02:46:05,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:05,394 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 508 [2022-11-23 02:46:05,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:46:08,100 INFO L130 PetriNetUnfolder]: 12819/19923 cut-off events. [2022-11-23 02:46:08,100 INFO L131 PetriNetUnfolder]: For 141/141 co-relation queries the response was YES. [2022-11-23 02:46:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38260 conditions, 19923 events. 12819/19923 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 131268 event pairs, 10970 based on Foata normal form. 3366/19533 useless extension candidates. Maximal degree in co-relation 15484. Up to 18227 conditions per place. [2022-11-23 02:46:08,253 INFO L137 encePairwiseOnDemand]: 473/508 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2022-11-23 02:46:08,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 296 flow [2022-11-23 02:46:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:46:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:46:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2022-11-23 02:46:08,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5019685039370079 [2022-11-23 02:46:08,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2022-11-23 02:46:08,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2022-11-23 02:46:08,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:46:08,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2022-11-23 02:46:08,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:08,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:08,271 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:08,272 INFO L175 Difference]: Start difference. First operand has 71 places, 107 transitions, 232 flow. Second operand 3 states and 765 transitions. [2022-11-23 02:46:08,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 296 flow [2022-11-23 02:46:08,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 02:46:08,276 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 180 flow [2022-11-23 02:46:08,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, 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} [2022-11-23 02:46:08,282 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-11-23 02:46:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 180 flow [2022-11-23 02:46:08,283 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) [2022-11-23 02:46:08,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:08,283 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 02:46:08,284 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)] === [2022-11-23 02:46:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:08,286 INFO L85 PathProgramCache]: Analyzing trace with hash 133715799, now seen corresponding path program 1 times [2022-11-23 02:46:08,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:08,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539678776] [2022-11-23 02:46:08,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:08,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:08,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539678776] [2022-11-23 02:46:08,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539678776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:46:08,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869958683] [2022-11-23 02:46:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:08,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:08,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:08,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:08,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:46:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 02:46:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:46:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:46:08,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:46:08,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869958683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:46:08,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:46:08,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 02:46:08,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638770071] [2022-11-23 02:46:08,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:46:08,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:46:08,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:08,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:46:08,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:46:08,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 508 [2022-11-23 02:46:08,491 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) [2022-11-23 02:46:08,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:08,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 508 [2022-11-23 02:46:08,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:46:11,098 INFO L130 PetriNetUnfolder]: 12636/19960 cut-off events. [2022-11-23 02:46:11,098 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-23 02:46:11,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38310 conditions, 19960 events. 12636/19960 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 136492 event pairs, 5190 based on Foata normal form. 0/16133 useless extension candidates. Maximal degree in co-relation 38297. Up to 18191 conditions per place. [2022-11-23 02:46:11,220 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 81 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2022-11-23 02:46:11,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 96 transitions, 386 flow [2022-11-23 02:46:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:46:11,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:46:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 752 transitions. [2022-11-23 02:46:11,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49343832020997375 [2022-11-23 02:46:11,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 752 transitions. [2022-11-23 02:46:11,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 752 transitions. [2022-11-23 02:46:11,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:46:11,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 752 transitions. [2022-11-23 02:46:11,227 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) [2022-11-23 02:46:11,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:11,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 508.0) internal successors, (2032), 4 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:11,232 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 180 flow. Second operand 3 states and 752 transitions. [2022-11-23 02:46:11,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 96 transitions, 386 flow [2022-11-23 02:46:11,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 96 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:46:11,239 INFO L231 Difference]: Finished difference. Result has 76 places, 77 transitions, 188 flow [2022-11-23 02:46:11,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, 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} [2022-11-23 02:46:11,241 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-11-23 02:46:11,242 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 77 transitions, 188 flow [2022-11-23 02:46:11,242 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) [2022-11-23 02:46:11,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:11,243 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:11,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:46:11,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:11,450 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)] === [2022-11-23 02:46:11,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1746616890, now seen corresponding path program 1 times [2022-11-23 02:46:11,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:11,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115628552] [2022-11-23 02:46:11,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:11,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:11,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115628552] [2022-11-23 02:46:11,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115628552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:46:11,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619968174] [2022-11-23 02:46:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:11,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:11,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:11,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:46:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:11,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:46:11,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:46:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:11,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:46:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:11,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619968174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:46:11,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:46:11,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 02:46:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059516483] [2022-11-23 02:46:11,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:46:11,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:46:11,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:46:11,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-23 02:46:11,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 508 [2022-11-23 02:46:11,693 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) [2022-11-23 02:46:11,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:11,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 508 [2022-11-23 02:46:11,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:46:13,695 INFO L130 PetriNetUnfolder]: 12906/20015 cut-off events. [2022-11-23 02:46:13,695 INFO L131 PetriNetUnfolder]: For 749/749 co-relation queries the response was YES. [2022-11-23 02:46:13,733 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 607. Compared 131866 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. [2022-11-23 02:46:13,823 INFO L137 encePairwiseOnDemand]: 505/508 looper letters, 62 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2022-11-23 02:46:13,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 80 transitions, 334 flow [2022-11-23 02:46:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:46:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:46:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1401 transitions. [2022-11-23 02:46:13,829 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4596456692913386 [2022-11-23 02:46:13,829 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1401 transitions. [2022-11-23 02:46:13,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1401 transitions. [2022-11-23 02:46:13,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:46:13,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1401 transitions. [2022-11-23 02:46:13,834 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) [2022-11-23 02:46:13,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:13,843 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:13,843 INFO L175 Difference]: Start difference. First operand has 76 places, 77 transitions, 188 flow. Second operand 6 states and 1401 transitions. [2022-11-23 02:46:13,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 80 transitions, 334 flow [2022-11-23 02:46:13,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 80 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:46:13,847 INFO L231 Difference]: Finished difference. Result has 83 places, 80 transitions, 222 flow [2022-11-23 02:46:13,847 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, 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} [2022-11-23 02:46:13,848 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 12 predicate places. [2022-11-23 02:46:13,848 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 80 transitions, 222 flow [2022-11-23 02:46:13,849 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) [2022-11-23 02:46:13,849 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:13,850 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:13,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 02:46:14,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:14,057 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)] === [2022-11-23 02:46:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1286811397, now seen corresponding path program 2 times [2022-11-23 02:46:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:14,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738541476] [2022-11-23 02:46:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:14,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:14,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:14,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738541476] [2022-11-23 02:46:14,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738541476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:46:14,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555812968] [2022-11-23 02:46:14,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:46:14,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:14,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:14,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:46:14,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:46:14,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:46:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 02:46:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:46:14,401 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 [2022-11-23 02:46:14,494 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 02:46:14,494 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 [2022-11-23 02:46:14,543 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 [2022-11-23 02:46:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:46:14,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:46:14,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555812968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:46:14,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:46:14,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2022-11-23 02:46:14,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051636337] [2022-11-23 02:46:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:46:14,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:46:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:46:14,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-23 02:46:14,877 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 508 [2022-11-23 02:46:14,878 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) [2022-11-23 02:46:14,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:14,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 508 [2022-11-23 02:46:14,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:46:18,060 INFO L130 PetriNetUnfolder]: 17133/26785 cut-off events. [2022-11-23 02:46:18,061 INFO L131 PetriNetUnfolder]: For 1109/1109 co-relation queries the response was YES. [2022-11-23 02:46:18,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52884 conditions, 26785 events. 17133/26785 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 191272 event pairs, 2079 based on Foata normal form. 0/21866 useless extension candidates. Maximal degree in co-relation 52848. Up to 17957 conditions per place. [2022-11-23 02:46:18,230 INFO L137 encePairwiseOnDemand]: 500/508 looper letters, 171 selfloop transitions, 14 changer transitions 0/198 dead transitions. [2022-11-23 02:46:18,230 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 198 transitions, 862 flow [2022-11-23 02:46:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:46:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:46:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1452 transitions. [2022-11-23 02:46:18,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4763779527559055 [2022-11-23 02:46:18,237 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1452 transitions. [2022-11-23 02:46:18,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1452 transitions. [2022-11-23 02:46:18,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:46:18,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1452 transitions. [2022-11-23 02:46:18,242 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) [2022-11-23 02:46:18,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:18,250 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 508.0) internal successors, (3556), 7 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:18,250 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 222 flow. Second operand 6 states and 1452 transitions. [2022-11-23 02:46:18,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 198 transitions, 862 flow [2022-11-23 02:46:18,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 198 transitions, 848 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 02:46:18,256 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 295 flow [2022-11-23 02:46:18,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, 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} [2022-11-23 02:46:18,258 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2022-11-23 02:46:18,258 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 295 flow [2022-11-23 02:46:18,259 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) [2022-11-23 02:46:18,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:18,259 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:18,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:46:18,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 02:46:18,465 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)] === [2022-11-23 02:46:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:18,466 INFO L85 PathProgramCache]: Analyzing trace with hash -2040527095, now seen corresponding path program 1 times [2022-11-23 02:46:18,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:18,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565887894] [2022-11-23 02:46:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:18,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 02:46:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565887894] [2022-11-23 02:46:18,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565887894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:46:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631176262] [2022-11-23 02:46:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:18,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:46:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:18,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:46:18,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:46:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:46:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:46:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:46:18,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:46:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:46:18,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631176262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:46:18,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:46:18,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-11-23 02:46:18,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309854394] [2022-11-23 02:46:18,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:46:18,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:46:18,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:18,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:46:18,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:46:18,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 508 [2022-11-23 02:46:18,907 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) [2022-11-23 02:46:18,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:18,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 508 [2022-11-23 02:46:18,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:46:22,190 INFO L130 PetriNetUnfolder]: 17232/27247 cut-off events. [2022-11-23 02:46:22,190 INFO L131 PetriNetUnfolder]: For 5044/5044 co-relation queries the response was YES. [2022-11-23 02:46:22,275 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 760. Compared 198224 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. [2022-11-23 02:46:22,349 INFO L137 encePairwiseOnDemand]: 503/508 looper letters, 131 selfloop transitions, 14 changer transitions 0/158 dead transitions. [2022-11-23 02:46:22,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 158 transitions, 783 flow [2022-11-23 02:46:22,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:46:22,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 02:46:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3200 transitions. [2022-11-23 02:46:22,361 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4499437570303712 [2022-11-23 02:46:22,361 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3200 transitions. [2022-11-23 02:46:22,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3200 transitions. [2022-11-23 02:46:22,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:46:22,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3200 transitions. [2022-11-23 02:46:22,373 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) [2022-11-23 02:46:22,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 508.0) internal successors, (7620), 15 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:22,389 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 508.0) internal successors, (7620), 15 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:46:22,389 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 295 flow. Second operand 14 states and 3200 transitions. [2022-11-23 02:46:22,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 158 transitions, 783 flow [2022-11-23 02:46:22,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 158 transitions, 783 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 02:46:22,423 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 365 flow [2022-11-23 02:46:22,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=508, 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} [2022-11-23 02:46:22,424 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 34 predicate places. [2022-11-23 02:46:22,425 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 365 flow [2022-11-23 02:46:22,427 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) [2022-11-23 02:46:22,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:22,427 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 02:46:22,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:46:22,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc50f131-9065-4b3c-97e3-0899fb87d6e8/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:46:22,635 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)] === [2022-11-23 02:46:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 812031991, now seen corresponding path program 1 times [2022-11-23 02:46:22,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:22,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990512566] [2022-11-23 02:46:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:22,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:46:22,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 02:46:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 02:46:22,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-23 02:46:22,684 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 02:46:22,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-23 02:46:22,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-23 02:46:22,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-23 02:46:22,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-23 02:46:22,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-23 02:46:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 02:46:22,686 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-11-23 02:46:22,687 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 02:46:22,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 02:46:22,724 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 02:46:22,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,035 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-11-23 02:46:23,036 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-23 02:46:23,048 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 3315 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. [2022-11-23 02:46:23,048 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,060 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:46:23,060 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,060 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 346 transitions, 722 flow [2022-11-23 02:46:23,188 INFO L130 PetriNetUnfolder]: 120/681 cut-off events. [2022-11-23 02:46:23,188 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-23 02:46:23,201 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 3315 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. [2022-11-23 02:46:23,239 INFO L119 LiptonReduction]: Number of co-enabled transitions 71568 [2022-11-23 02:46:30,480 INFO L134 LiptonReduction]: Checked pairs total: 115987 [2022-11-23 02:46:30,480 INFO L136 LiptonReduction]: Total number of compositions: 301 [2022-11-23 02:46:30,483 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:46:30,483 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;@425f1178, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:46:30,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-23 02:46:30,489 INFO L130 PetriNetUnfolder]: 11/33 cut-off events. [2022-11-23 02:46:30,489 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:46:30,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:46:30,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:46:30,490 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)] === [2022-11-23 02:46:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:46:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1957239675, now seen corresponding path program 1 times [2022-11-23 02:46:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:46:30,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321664134] [2022-11-23 02:46:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:46:30,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:46:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:46:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:46:30,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:46:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321664134] [2022-11-23 02:46:30,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321664134] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:46:30,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:46:30,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:46:30,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374874951] [2022-11-23 02:46:30,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:46:30,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:46:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:46:30,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:46:30,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:46:30,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 647 [2022-11-23 02:46:30,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 140 transitions, 310 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) [2022-11-23 02:46:30,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:46:30,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 647 [2022-11-23 02:46:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand