./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN --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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- 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-6b4ec56 [2022-11-20 10:38:19,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:38:19,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:38:19,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:38:19,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:38:19,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:38:19,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:38:19,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:38:19,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:38:19,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:38:19,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:38:19,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:38:19,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:38:19,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:38:19,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:38:19,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:38:19,253 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:38:19,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:38:19,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:38:19,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:38:19,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:38:19,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:38:19,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:38:19,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:38:19,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:38:19,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:38:19,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:38:19,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:38:19,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:38:19,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:38:19,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:38:19,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:38:19,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:38:19,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:38:19,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:38:19,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:38:19,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:38:19,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:38:19,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:38:19,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:38:19,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:38:19,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:38:19,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:38:19,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:38:19,332 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:38:19,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:38:19,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:38:19,334 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:38:19,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:38:19,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:38:19,335 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:38:19,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:38:19,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:38:19,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:38:19,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:38:19,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:38:19,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:38:19,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:38:19,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:38:19,338 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:38:19,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:38:19,338 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:38:19,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:38:19,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:38:19,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:38:19,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:38:19,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:19,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:38:19,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:38:19,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:38:19,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:38:19,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:38:19,340 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:38:19,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:38:19,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:38:19,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2022-11-20 10:38:19,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:38:19,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:38:19,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:38:19,682 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:38:19,682 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:38:19,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-20 10:38:22,808 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:38:23,041 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:38:23,042 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-20 10:38:23,059 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/data/d51f10878/4d41f3f865b34eafaa8ef5936885ac37/FLAG879aaf48d [2022-11-20 10:38:23,084 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/data/d51f10878/4d41f3f865b34eafaa8ef5936885ac37 [2022-11-20 10:38:23,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:38:23,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:38:23,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:23,092 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:38:23,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:38:23,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@572e47e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23, skipping insertion in model container [2022-11-20 10:38:23,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:38:23,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:38:23,535 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_431ef629-3aa0-47e6-be22-ba386750e8ec/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-20 10:38:23,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:23,582 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:38:23,623 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_431ef629-3aa0-47e6-be22-ba386750e8ec/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-20 10:38:23,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:23,682 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:38:23,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23 WrapperNode [2022-11-20 10:38:23,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:23,684 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:23,684 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:38:23,684 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:38:23,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,701 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,722 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-20 10:38:23,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:23,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:38:23,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:38:23,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:38:23,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,750 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:38:23,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:38:23,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:38:23,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:38:23,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (1/1) ... [2022-11-20 10:38:23,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:23,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:23,802 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:38:23,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:38:23,840 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 10:38:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 10:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-20 10:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:38:23,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:38:23,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:38:23,843 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:38:23,964 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:38:23,966 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:38:24,238 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:38:24,246 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:38:24,246 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 10:38:24,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:24 BoogieIcfgContainer [2022-11-20 10:38:24,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:38:24,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:38:24,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:38:24,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:38:24,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:38:23" (1/3) ... [2022-11-20 10:38:24,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a08e72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:24, skipping insertion in model container [2022-11-20 10:38:24,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:23" (2/3) ... [2022-11-20 10:38:24,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a08e72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:24, skipping insertion in model container [2022-11-20 10:38:24,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:24" (3/3) ... [2022-11-20 10:38:24,258 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2022-11-20 10:38:24,275 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:38:24,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:38:24,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:38:24,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:38:24,342 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 10:38:24,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 109 transitions, 226 flow [2022-11-20 10:38:24,444 INFO L130 PetriNetUnfolder]: 21/149 cut-off events. [2022-11-20 10:38:24,444 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 10:38:24,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 21/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 367 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 73. Up to 6 conditions per place. [2022-11-20 10:38:24,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 109 transitions, 226 flow [2022-11-20 10:38:24,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 104 transitions, 213 flow [2022-11-20 10:38:24,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:24,479 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;@b1393ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:24,479 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:38:24,502 INFO L130 PetriNetUnfolder]: 4/73 cut-off events. [2022-11-20 10:38:24,502 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:24,502 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:24,503 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:24,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1902334783, now seen corresponding path program 1 times [2022-11-20 10:38:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:24,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585895057] [2022-11-20 10:38:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:24,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585895057] [2022-11-20 10:38:24,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585895057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:24,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:24,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:24,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547150875] [2022-11-20 10:38:24,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:24,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:24,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:24,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:24,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 109 [2022-11-20 10:38:24,888 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 213 flow. Second operand has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:24,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:24,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 109 [2022-11-20 10:38:24,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:24,935 INFO L130 PetriNetUnfolder]: 2/124 cut-off events. [2022-11-20 10:38:24,935 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 10:38:24,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 124 events. 2/124 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 0 based on Foata normal form. 18/134 useless extension candidates. Maximal degree in co-relation 62. Up to 4 conditions per place. [2022-11-20 10:38:24,937 INFO L137 encePairwiseOnDemand]: 97/109 looper letters, 1 selfloop transitions, 0 changer transitions 15/91 dead transitions. [2022-11-20 10:38:24,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 189 flow [2022-11-20 10:38:24,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 201 transitions. [2022-11-20 10:38:24,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9220183486238532 [2022-11-20 10:38:24,952 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 201 transitions. [2022-11-20 10:38:24,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 201 transitions. [2022-11-20 10:38:24,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:24,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 201 transitions. [2022-11-20 10:38:24,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:24,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:24,964 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:24,966 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 213 flow. Second operand 2 states and 201 transitions. [2022-11-20 10:38:24,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 189 flow [2022-11-20 10:38:24,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 91 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:24,973 INFO L231 Difference]: Finished difference. Result has 94 places, 76 transitions, 157 flow [2022-11-20 10:38:24,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=157, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2022-11-20 10:38:24,979 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, 0 predicate places. [2022-11-20 10:38:24,980 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 157 flow [2022-11-20 10:38:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:24,980 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:24,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:38:24,981 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash 525085933, now seen corresponding path program 1 times [2022-11-20 10:38:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:24,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178020739] [2022-11-20 10:38:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:25,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:25,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178020739] [2022-11-20 10:38:25,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178020739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:25,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:25,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:25,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169314538] [2022-11-20 10:38:25,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:25,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:25,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:25,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:25,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:25,180 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2022-11-20 10:38:25,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:25,184 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2022-11-20 10:38:25,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:25,232 INFO L130 PetriNetUnfolder]: 1/80 cut-off events. [2022-11-20 10:38:25,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:25,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 80 events. 1/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2022-11-20 10:38:25,233 INFO L137 encePairwiseOnDemand]: 106/109 looper letters, 8 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-11-20 10:38:25,234 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 181 flow [2022-11-20 10:38:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:38:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-11-20 10:38:25,236 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8318042813455657 [2022-11-20 10:38:25,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-11-20 10:38:25,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-11-20 10:38:25,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:25,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-11-20 10:38:25,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,242 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,242 INFO L175 Difference]: Start difference. First operand has 94 places, 76 transitions, 157 flow. Second operand 3 states and 272 transitions. [2022-11-20 10:38:25,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 181 flow [2022-11-20 10:38:25,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 181 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:25,245 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 165 flow [2022-11-20 10:38:25,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2022-11-20 10:38:25,247 INFO L288 CegarLoopForPetriNet]: 94 programPoint places, -12 predicate places. [2022-11-20 10:38:25,247 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 165 flow [2022-11-20 10:38:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:25,248 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:25,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:38:25,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:25,249 INFO L85 PathProgramCache]: Analyzing trace with hash 43909355, now seen corresponding path program 1 times [2022-11-20 10:38:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466906842] [2022-11-20 10:38:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:25,283 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:25,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:25,324 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:25,325 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 10:38:25,327 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 10:38:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:38:25,328 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 10:38:25,331 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:25,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 10:38:25,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:38:25,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 139 transitions, 296 flow [2022-11-20 10:38:25,413 INFO L130 PetriNetUnfolder]: 37/244 cut-off events. [2022-11-20 10:38:25,413 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 10:38:25,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 244 events. 37/244 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 720 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-11-20 10:38:25,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 139 transitions, 296 flow [2022-11-20 10:38:25,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 139 transitions, 296 flow [2022-11-20 10:38:25,421 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:25,422 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;@b1393ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:25,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:38:25,434 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-20 10:38:25,434 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:25,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:25,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:25,435 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -201943638, now seen corresponding path program 1 times [2022-11-20 10:38:25,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:25,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803486823] [2022-11-20 10:38:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:25,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803486823] [2022-11-20 10:38:25,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803486823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:25,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:25,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:25,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424895102] [2022-11-20 10:38:25,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:25,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:25,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:25,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 139 [2022-11-20 10:38:25,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 296 flow. Second operand has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:25,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 139 [2022-11-20 10:38:25,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:25,589 INFO L130 PetriNetUnfolder]: 6/210 cut-off events. [2022-11-20 10:38:25,590 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-20 10:38:25,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 210 events. 6/210 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 542 event pairs, 0 based on Foata normal form. 45/242 useless extension candidates. Maximal degree in co-relation 133. Up to 7 conditions per place. [2022-11-20 10:38:25,593 INFO L137 encePairwiseOnDemand]: 121/139 looper letters, 2 selfloop transitions, 0 changer transitions 21/120 dead transitions. [2022-11-20 10:38:25,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 120 transitions, 266 flow [2022-11-20 10:38:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 254 transitions. [2022-11-20 10:38:25,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9136690647482014 [2022-11-20 10:38:25,601 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 254 transitions. [2022-11-20 10:38:25,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 254 transitions. [2022-11-20 10:38:25,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:25,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 254 transitions. [2022-11-20 10:38:25,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.0) internal successors, (254), 2 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,609 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,609 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 296 flow. Second operand 2 states and 254 transitions. [2022-11-20 10:38:25,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 120 transitions, 266 flow [2022-11-20 10:38:25,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 120 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:25,615 INFO L231 Difference]: Finished difference. Result has 123 places, 99 transitions, 210 flow [2022-11-20 10:38:25,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2022-11-20 10:38:25,618 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 0 predicate places. [2022-11-20 10:38:25,619 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 210 flow [2022-11-20 10:38:25,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 117.0) internal successors, (234), 2 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:25,620 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:38:25,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:25,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1243124216, now seen corresponding path program 1 times [2022-11-20 10:38:25,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:25,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894218891] [2022-11-20 10:38:25,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:25,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894218891] [2022-11-20 10:38:25,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894218891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:25,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:25,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821624837] [2022-11-20 10:38:25,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:25,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:25,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:25,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:25,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:25,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 139 [2022-11-20 10:38:25,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:25,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 139 [2022-11-20 10:38:25,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:25,782 INFO L130 PetriNetUnfolder]: 2/126 cut-off events. [2022-11-20 10:38:25,783 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:38:25,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 126 events. 2/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 210 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 149. Up to 12 conditions per place. [2022-11-20 10:38:25,784 INFO L137 encePairwiseOnDemand]: 136/139 looper letters, 11 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-11-20 10:38:25,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 103 transitions, 244 flow [2022-11-20 10:38:25,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:38:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2022-11-20 10:38:25,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8177458033573142 [2022-11-20 10:38:25,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2022-11-20 10:38:25,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2022-11-20 10:38:25,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:25,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2022-11-20 10:38:25,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,790 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,790 INFO L175 Difference]: Start difference. First operand has 123 places, 99 transitions, 210 flow. Second operand 3 states and 341 transitions. [2022-11-20 10:38:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 103 transitions, 244 flow [2022-11-20 10:38:25,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 103 transitions, 242 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:25,793 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 220 flow [2022-11-20 10:38:25,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-11-20 10:38:25,795 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -16 predicate places. [2022-11-20 10:38:25,795 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 220 flow [2022-11-20 10:38:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:25,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:25,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:38:25,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1351761021, now seen corresponding path program 1 times [2022-11-20 10:38:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:25,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829746431] [2022-11-20 10:38:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:25,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:25,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829746431] [2022-11-20 10:38:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829746431] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931097733] [2022-11-20 10:38:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:25,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:26,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:38:26,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:26,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931097733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:26,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:26,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:38:26,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334059483] [2022-11-20 10:38:26,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:26,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:26,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 139 [2022-11-20 10:38:26,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:26,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 139 [2022-11-20 10:38:26,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:26,317 INFO L130 PetriNetUnfolder]: 0/98 cut-off events. [2022-11-20 10:38:26,318 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 10:38:26,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 98 events. 0/98 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-11-20 10:38:26,318 INFO L137 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2022-11-20 10:38:26,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 92 transitions, 234 flow [2022-11-20 10:38:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:38:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 990 transitions. [2022-11-20 10:38:26,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913669064748201 [2022-11-20 10:38:26,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 990 transitions. [2022-11-20 10:38:26,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 990 transitions. [2022-11-20 10:38:26,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:26,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 990 transitions. [2022-11-20 10:38:26,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 110.0) internal successors, (990), 9 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,329 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,330 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 220 flow. Second operand 9 states and 990 transitions. [2022-11-20 10:38:26,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 92 transitions, 234 flow [2022-11-20 10:38:26,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 92 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:38:26,333 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 206 flow [2022-11-20 10:38:26,333 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2022-11-20 10:38:26,334 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -22 predicate places. [2022-11-20 10:38:26,334 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 206 flow [2022-11-20 10:38:26,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 110.3) internal successors, (1103), 10 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:26,335 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:26,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:26,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:38:26,542 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,542 INFO L85 PathProgramCache]: Analyzing trace with hash -392863105, now seen corresponding path program 1 times [2022-11-20 10:38:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292005153] [2022-11-20 10:38:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:26,575 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:26,607 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:26,611 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:26,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 10:38:26,612 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 10:38:26,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 10:38:26,612 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 10:38:26,613 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:26,614 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 10:38:26,644 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 10:38:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 169 transitions, 368 flow [2022-11-20 10:38:26,712 INFO L130 PetriNetUnfolder]: 58/372 cut-off events. [2022-11-20 10:38:26,713 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 10:38:26,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 372 events. 58/372 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1229 event pairs, 1 based on Foata normal form. 0/306 useless extension candidates. Maximal degree in co-relation 252. Up to 16 conditions per place. [2022-11-20 10:38:26,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 169 transitions, 368 flow [2022-11-20 10:38:26,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 169 transitions, 368 flow [2022-11-20 10:38:26,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:26,721 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;@b1393ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:26,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:38:26,728 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-20 10:38:26,728 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:26,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:26,728 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:26,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,729 INFO L85 PathProgramCache]: Analyzing trace with hash -844642061, now seen corresponding path program 1 times [2022-11-20 10:38:26,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345294006] [2022-11-20 10:38:26,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345294006] [2022-11-20 10:38:26,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345294006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:26,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:26,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106645529] [2022-11-20 10:38:26,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:26,763 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 169 [2022-11-20 10:38:26,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 368 flow. Second operand has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:26,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 169 [2022-11-20 10:38:26,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:26,841 INFO L130 PetriNetUnfolder]: 12/322 cut-off events. [2022-11-20 10:38:26,842 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-20 10:38:26,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 322 events. 12/322 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1023 event pairs, 1 based on Foata normal form. 110/412 useless extension candidates. Maximal degree in co-relation 224. Up to 16 conditions per place. [2022-11-20 10:38:26,844 INFO L137 encePairwiseOnDemand]: 145/169 looper letters, 3 selfloop transitions, 0 changer transitions 22/144 dead transitions. [2022-11-20 10:38:26,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 144 transitions, 330 flow [2022-11-20 10:38:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:26,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 306 transitions. [2022-11-20 10:38:26,846 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9053254437869822 [2022-11-20 10:38:26,846 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 306 transitions. [2022-11-20 10:38:26,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 306 transitions. [2022-11-20 10:38:26,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:26,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 306 transitions. [2022-11-20 10:38:26,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.0) internal successors, (306), 2 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,849 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,849 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 368 flow. Second operand 2 states and 306 transitions. [2022-11-20 10:38:26,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 144 transitions, 330 flow [2022-11-20 10:38:26,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 144 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:26,856 INFO L231 Difference]: Finished difference. Result has 148 places, 122 transitions, 265 flow [2022-11-20 10:38:26,856 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=265, PETRI_PLACES=148, PETRI_TRANSITIONS=122} [2022-11-20 10:38:26,858 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, 0 predicate places. [2022-11-20 10:38:26,858 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 122 transitions, 265 flow [2022-11-20 10:38:26,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.0) internal successors, (278), 2 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:26,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:26,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:38:26,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2085235745, now seen corresponding path program 1 times [2022-11-20 10:38:26,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626589401] [2022-11-20 10:38:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:26,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626589401] [2022-11-20 10:38:26,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626589401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:26,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:26,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419199836] [2022-11-20 10:38:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:26,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:26,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:26,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:26,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:26,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 169 [2022-11-20 10:38:26,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 122 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,942 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:26,942 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 169 [2022-11-20 10:38:26,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:26,993 INFO L130 PetriNetUnfolder]: 3/172 cut-off events. [2022-11-20 10:38:26,993 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:38:26,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 172 events. 3/172 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 367 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 206. Up to 18 conditions per place. [2022-11-20 10:38:26,995 INFO L137 encePairwiseOnDemand]: 166/169 looper letters, 12 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-11-20 10:38:26,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 301 flow [2022-11-20 10:38:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:38:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2022-11-20 10:38:26,997 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8047337278106509 [2022-11-20 10:38:26,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2022-11-20 10:38:26,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2022-11-20 10:38:26,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:26,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2022-11-20 10:38:26,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 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) [2022-11-20 10:38:27,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 169.0) internal successors, (676), 4 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) [2022-11-20 10:38:27,002 INFO L175 Difference]: Start difference. First operand has 148 places, 122 transitions, 265 flow. Second operand 3 states and 408 transitions. [2022-11-20 10:38:27,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 301 flow [2022-11-20 10:38:27,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 126 transitions, 295 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:27,005 INFO L231 Difference]: Finished difference. Result has 132 places, 123 transitions, 271 flow [2022-11-20 10:38:27,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=132, PETRI_TRANSITIONS=123} [2022-11-20 10:38:27,007 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -16 predicate places. [2022-11-20 10:38:27,007 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 123 transitions, 271 flow [2022-11-20 10:38:27,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,007 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:27,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:27,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:38:27,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -185774998, now seen corresponding path program 1 times [2022-11-20 10:38:27,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:27,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879997009] [2022-11-20 10:38:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879997009] [2022-11-20 10:38:27,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879997009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:27,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938720514] [2022-11-20 10:38:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:27,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:27,126 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:27,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:38:27,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938720514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:27,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:27,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:38:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345618793] [2022-11-20 10:38:27,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:27,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:27,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:27,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 169 [2022-11-20 10:38:27,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 123 transitions, 271 flow. Second operand has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:27,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 169 [2022-11-20 10:38:27,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:27,416 INFO L130 PetriNetUnfolder]: 1/144 cut-off events. [2022-11-20 10:38:27,416 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 10:38:27,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 144 events. 1/144 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 212 event pairs, 0 based on Foata normal form. 2/145 useless extension candidates. Maximal degree in co-relation 182. Up to 7 conditions per place. [2022-11-20 10:38:27,417 INFO L137 encePairwiseOnDemand]: 163/169 looper letters, 13 selfloop transitions, 9 changer transitions 0/133 dead transitions. [2022-11-20 10:38:27,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 337 flow [2022-11-20 10:38:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:38:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1194 transitions. [2022-11-20 10:38:27,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7850098619329389 [2022-11-20 10:38:27,421 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1194 transitions. [2022-11-20 10:38:27,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1194 transitions. [2022-11-20 10:38:27,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:27,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1194 transitions. [2022-11-20 10:38:27,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 132.66666666666666) internal successors, (1194), 9 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,429 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 169.0) internal successors, (1690), 10 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,429 INFO L175 Difference]: Start difference. First operand has 132 places, 123 transitions, 271 flow. Second operand 9 states and 1194 transitions. [2022-11-20 10:38:27,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 337 flow [2022-11-20 10:38:27,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 133 transitions, 335 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:38:27,432 INFO L231 Difference]: Finished difference. Result has 142 places, 129 transitions, 319 flow [2022-11-20 10:38:27,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=319, PETRI_PLACES=142, PETRI_TRANSITIONS=129} [2022-11-20 10:38:27,433 INFO L288 CegarLoopForPetriNet]: 148 programPoint places, -6 predicate places. [2022-11-20 10:38:27,433 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 129 transitions, 319 flow [2022-11-20 10:38:27,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.3) internal successors, (1323), 10 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:27,435 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:27,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:38:27,641 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash 499831500, now seen corresponding path program 1 times [2022-11-20 10:38:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:27,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457991340] [2022-11-20 10:38:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:27,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:27,700 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:27,700 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:27,700 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 10:38:27,700 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 10:38:27,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:38:27,701 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 10:38:27,701 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:27,702 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 10:38:27,746 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 10:38:27,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 173 places, 199 transitions, 442 flow [2022-11-20 10:38:27,879 INFO L130 PetriNetUnfolder]: 91/568 cut-off events. [2022-11-20 10:38:27,880 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 10:38:27,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 568 events. 91/568 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2162 event pairs, 6 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 392. Up to 32 conditions per place. [2022-11-20 10:38:27,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 173 places, 199 transitions, 442 flow [2022-11-20 10:38:27,890 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 173 places, 199 transitions, 442 flow [2022-11-20 10:38:27,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:27,893 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;@b1393ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:27,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:38:27,903 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-20 10:38:27,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:27,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:27,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:27,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -25760486, now seen corresponding path program 1 times [2022-11-20 10:38:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036160213] [2022-11-20 10:38:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:27,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:27,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036160213] [2022-11-20 10:38:27,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036160213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:27,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:27,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:27,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107844186] [2022-11-20 10:38:27,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:27,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:27,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:27,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 199 [2022-11-20 10:38:27,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 199 transitions, 442 flow. Second operand has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:27,960 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 199 [2022-11-20 10:38:27,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:28,087 INFO L130 PetriNetUnfolder]: 26/498 cut-off events. [2022-11-20 10:38:28,087 INFO L131 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2022-11-20 10:38:28,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 498 events. 26/498 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1959 event pairs, 6 based on Foata normal form. 257/724 useless extension candidates. Maximal degree in co-relation 357. Up to 37 conditions per place. [2022-11-20 10:38:28,090 INFO L137 encePairwiseOnDemand]: 169/199 looper letters, 4 selfloop transitions, 0 changer transitions 23/168 dead transitions. [2022-11-20 10:38:28,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 168 transitions, 396 flow [2022-11-20 10:38:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2022-11-20 10:38:28,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8994974874371859 [2022-11-20 10:38:28,092 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2022-11-20 10:38:28,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2022-11-20 10:38:28,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:28,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2022-11-20 10:38:28,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,095 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,095 INFO L175 Difference]: Start difference. First operand has 173 places, 199 transitions, 442 flow. Second operand 2 states and 358 transitions. [2022-11-20 10:38:28,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 168 transitions, 396 flow [2022-11-20 10:38:28,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 168 transitions, 396 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:28,101 INFO L231 Difference]: Finished difference. Result has 173 places, 145 transitions, 322 flow [2022-11-20 10:38:28,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=322, PETRI_PLACES=173, PETRI_TRANSITIONS=145} [2022-11-20 10:38:28,102 INFO L288 CegarLoopForPetriNet]: 173 programPoint places, 0 predicate places. [2022-11-20 10:38:28,102 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 145 transitions, 322 flow [2022-11-20 10:38:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 161.0) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:28,103 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:38:28,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1243546776, now seen corresponding path program 1 times [2022-11-20 10:38:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319983354] [2022-11-20 10:38:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:28,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:28,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319983354] [2022-11-20 10:38:28,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319983354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:28,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:28,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:28,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133895660] [2022-11-20 10:38:28,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:28,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:28,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:28,144 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 199 [2022-11-20 10:38:28,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 145 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:28,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 199 [2022-11-20 10:38:28,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:28,202 INFO L130 PetriNetUnfolder]: 4/218 cut-off events. [2022-11-20 10:38:28,203 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 10:38:28,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 218 events. 4/218 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 523 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 264. Up to 24 conditions per place. [2022-11-20 10:38:28,204 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 13 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2022-11-20 10:38:28,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 360 flow [2022-11-20 10:38:28,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:38:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2022-11-20 10:38:28,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956448911222781 [2022-11-20 10:38:28,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2022-11-20 10:38:28,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2022-11-20 10:38:28,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:28,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2022-11-20 10:38:28,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,211 INFO L175 Difference]: Start difference. First operand has 173 places, 145 transitions, 322 flow. Second operand 3 states and 475 transitions. [2022-11-20 10:38:28,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 360 flow [2022-11-20 10:38:28,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 149 transitions, 348 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:28,215 INFO L231 Difference]: Finished difference. Result has 157 places, 146 transitions, 322 flow [2022-11-20 10:38:28,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=322, PETRI_PLACES=157, PETRI_TRANSITIONS=146} [2022-11-20 10:38:28,216 INFO L288 CegarLoopForPetriNet]: 173 programPoint places, -16 predicate places. [2022-11-20 10:38:28,216 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 146 transitions, 322 flow [2022-11-20 10:38:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:28,217 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:38:28,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -954141003, now seen corresponding path program 1 times [2022-11-20 10:38:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:28,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044357856] [2022-11-20 10:38:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:28,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:28,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044357856] [2022-11-20 10:38:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044357856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:28,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797948205] [2022-11-20 10:38:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:28,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:28,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:38:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:28,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:38:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:28,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:28,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797948205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:28,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:28,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:38:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273418983] [2022-11-20 10:38:28,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:28,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 199 [2022-11-20 10:38:28,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 146 transitions, 322 flow. Second operand has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:28,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 199 [2022-11-20 10:38:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:28,668 INFO L130 PetriNetUnfolder]: 2/190 cut-off events. [2022-11-20 10:38:28,668 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 10:38:28,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 190 events. 2/190 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 368 event pairs, 0 based on Foata normal form. 2/190 useless extension candidates. Maximal degree in co-relation 240. Up to 11 conditions per place. [2022-11-20 10:38:28,670 INFO L137 encePairwiseOnDemand]: 193/199 looper letters, 14 selfloop transitions, 9 changer transitions 0/156 dead transitions. [2022-11-20 10:38:28,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 156 transitions, 390 flow [2022-11-20 10:38:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:38:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1393 transitions. [2022-11-20 10:38:28,674 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2022-11-20 10:38:28,674 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1393 transitions. [2022-11-20 10:38:28,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1393 transitions. [2022-11-20 10:38:28,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:28,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1393 transitions. [2022-11-20 10:38:28,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 154.77777777777777) internal successors, (1393), 9 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,707 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 199.0) internal successors, (1990), 10 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,708 INFO L175 Difference]: Start difference. First operand has 157 places, 146 transitions, 322 flow. Second operand 9 states and 1393 transitions. [2022-11-20 10:38:28,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 156 transitions, 390 flow [2022-11-20 10:38:28,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 156 transitions, 388 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:38:28,711 INFO L231 Difference]: Finished difference. Result has 167 places, 152 transitions, 370 flow [2022-11-20 10:38:28,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=167, PETRI_TRANSITIONS=152} [2022-11-20 10:38:28,712 INFO L288 CegarLoopForPetriNet]: 173 programPoint places, -6 predicate places. [2022-11-20 10:38:28,712 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 152 transitions, 370 flow [2022-11-20 10:38:28,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 154.3) internal successors, (1543), 10 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:28,713 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:28,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:38:28,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash -770173908, now seen corresponding path program 1 times [2022-11-20 10:38:28,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:28,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952272447] [2022-11-20 10:38:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 10:38:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:29,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952272447] [2022-11-20 10:38:29,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952272447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:29,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:29,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912502249] [2022-11-20 10:38:29,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:29,049 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 199 [2022-11-20 10:38:29,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 152 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:29,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:29,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 199 [2022-11-20 10:38:29,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:36,050 INFO L130 PetriNetUnfolder]: 16764/41462 cut-off events. [2022-11-20 10:38:36,051 INFO L131 PetriNetUnfolder]: For 555/555 co-relation queries the response was YES. [2022-11-20 10:38:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64879 conditions, 41462 events. 16764/41462 cut-off events. For 555/555 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 494821 event pairs, 10951 based on Foata normal form. 750/41629 useless extension candidates. Maximal degree in co-relation 64868. Up to 14189 conditions per place. [2022-11-20 10:38:36,591 INFO L137 encePairwiseOnDemand]: 191/199 looper letters, 31 selfloop transitions, 5 changer transitions 53/216 dead transitions. [2022-11-20 10:38:36,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 216 transitions, 691 flow [2022-11-20 10:38:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:38:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:38:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1057 transitions. [2022-11-20 10:38:36,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7587939698492462 [2022-11-20 10:38:36,609 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1057 transitions. [2022-11-20 10:38:36,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1057 transitions. [2022-11-20 10:38:36,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:36,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1057 transitions. [2022-11-20 10:38:36,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 151.0) internal successors, (1057), 7 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,619 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 199.0) internal successors, (1592), 8 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,619 INFO L175 Difference]: Start difference. First operand has 167 places, 152 transitions, 370 flow. Second operand 7 states and 1057 transitions. [2022-11-20 10:38:36,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 216 transitions, 691 flow [2022-11-20 10:38:36,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 216 transitions, 685 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-20 10:38:36,630 INFO L231 Difference]: Finished difference. Result has 177 places, 156 transitions, 421 flow [2022-11-20 10:38:36,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=177, PETRI_TRANSITIONS=156} [2022-11-20 10:38:36,632 INFO L288 CegarLoopForPetriNet]: 173 programPoint places, 4 predicate places. [2022-11-20 10:38:36,632 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 156 transitions, 421 flow [2022-11-20 10:38:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:36,633 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:36,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:38:36,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1523698642, now seen corresponding path program 1 times [2022-11-20 10:38:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212453184] [2022-11-20 10:38:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:36,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:36,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:36,703 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:36,704 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:36,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-20 10:38:36,705 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-20 10:38:36,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 10:38:36,706 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-20 10:38:36,706 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:36,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 10:38:36,748 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 10:38:36,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 229 transitions, 518 flow [2022-11-20 10:38:36,903 INFO L130 PetriNetUnfolder]: 152/904 cut-off events. [2022-11-20 10:38:36,904 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 10:38:36,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 904 events. 152/904 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4132 event pairs, 23 based on Foata normal form. 0/762 useless extension candidates. Maximal degree in co-relation 613. Up to 80 conditions per place. [2022-11-20 10:38:36,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 229 transitions, 518 flow [2022-11-20 10:38:36,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 229 transitions, 518 flow [2022-11-20 10:38:36,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:36,922 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;@b1393ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:36,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:38:36,927 INFO L130 PetriNetUnfolder]: 4/69 cut-off events. [2022-11-20 10:38:36,927 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:36,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:36,927 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:36,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:36,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2040266209, now seen corresponding path program 1 times [2022-11-20 10:38:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368464905] [2022-11-20 10:38:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:36,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:36,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:36,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368464905] [2022-11-20 10:38:36,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368464905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:36,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:36,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:36,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923882512] [2022-11-20 10:38:36,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:38:36,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:38:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:38:36,956 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 229 [2022-11-20 10:38:36,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 229 transitions, 518 flow. Second operand has 2 states, 2 states have (on average 183.0) internal successors, (366), 2 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:36,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:36,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 229 [2022-11-20 10:38:36,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:37,121 INFO L130 PetriNetUnfolder]: 60/806 cut-off events. [2022-11-20 10:38:37,121 INFO L131 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2022-11-20 10:38:37,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 806 events. 60/806 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3806 event pairs, 23 based on Foata normal form. 586/1342 useless extension candidates. Maximal degree in co-relation 579. Up to 86 conditions per place. [2022-11-20 10:38:37,127 INFO L137 encePairwiseOnDemand]: 193/229 looper letters, 5 selfloop transitions, 0 changer transitions 24/192 dead transitions. [2022-11-20 10:38:37,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 192 transitions, 464 flow [2022-11-20 10:38:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:38:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:38:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 410 transitions. [2022-11-20 10:38:37,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8951965065502183 [2022-11-20 10:38:37,130 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 410 transitions. [2022-11-20 10:38:37,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 410 transitions. [2022-11-20 10:38:37,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:37,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 410 transitions. [2022-11-20 10:38:37,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 205.0) internal successors, (410), 2 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,133 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,133 INFO L175 Difference]: Start difference. First operand has 198 places, 229 transitions, 518 flow. Second operand 2 states and 410 transitions. [2022-11-20 10:38:37,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 192 transitions, 464 flow [2022-11-20 10:38:37,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 192 transitions, 464 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:37,138 INFO L231 Difference]: Finished difference. Result has 198 places, 168 transitions, 381 flow [2022-11-20 10:38:37,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=381, PETRI_PLACES=198, PETRI_TRANSITIONS=168} [2022-11-20 10:38:37,139 INFO L288 CegarLoopForPetriNet]: 198 programPoint places, 0 predicate places. [2022-11-20 10:38:37,139 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 168 transitions, 381 flow [2022-11-20 10:38:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 183.0) internal successors, (366), 2 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:37,140 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:37,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 10:38:37,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash -153288755, now seen corresponding path program 1 times [2022-11-20 10:38:37,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:37,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244117513] [2022-11-20 10:38:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:37,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:37,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244117513] [2022-11-20 10:38:37,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244117513] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:37,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:37,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:38:37,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696988507] [2022-11-20 10:38:37,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:37,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:37,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:37,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:37,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:37,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 229 [2022-11-20 10:38:37,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 168 transitions, 381 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:37,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 229 [2022-11-20 10:38:37,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:37,236 INFO L130 PetriNetUnfolder]: 5/264 cut-off events. [2022-11-20 10:38:37,236 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-20 10:38:37,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 264 events. 5/264 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 681 event pairs, 0 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 323. Up to 30 conditions per place. [2022-11-20 10:38:37,238 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 14 selfloop transitions, 2 changer transitions 0/172 dead transitions. [2022-11-20 10:38:37,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 172 transitions, 421 flow [2022-11-20 10:38:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 10:38:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-11-20 10:38:37,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7889374090247453 [2022-11-20 10:38:37,240 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-11-20 10:38:37,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-11-20 10:38:37,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:37,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-11-20 10:38:37,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,244 INFO L175 Difference]: Start difference. First operand has 198 places, 168 transitions, 381 flow. Second operand 3 states and 542 transitions. [2022-11-20 10:38:37,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 172 transitions, 421 flow [2022-11-20 10:38:37,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 172 transitions, 401 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-20 10:38:37,248 INFO L231 Difference]: Finished difference. Result has 182 places, 169 transitions, 373 flow [2022-11-20 10:38:37,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=373, PETRI_PLACES=182, PETRI_TRANSITIONS=169} [2022-11-20 10:38:37,249 INFO L288 CegarLoopForPetriNet]: 198 programPoint places, -16 predicate places. [2022-11-20 10:38:37,249 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 169 transitions, 373 flow [2022-11-20 10:38:37,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:37,250 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:37,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 10:38:37,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:37,251 INFO L85 PathProgramCache]: Analyzing trace with hash -953336994, now seen corresponding path program 1 times [2022-11-20 10:38:37,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:37,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138354251] [2022-11-20 10:38:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:37,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:37,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138354251] [2022-11-20 10:38:37,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138354251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:37,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285343355] [2022-11-20 10:38:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:37,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:37,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:37,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:37,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:38:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:37,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:38:37,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:37,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285343355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:37,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 10:38:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068461834] [2022-11-20 10:38:37,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:37,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:38:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:37,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:38:37,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:38:37,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 229 [2022-11-20 10:38:37,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 169 transitions, 373 flow. Second operand has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:37,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 229 [2022-11-20 10:38:37,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:38:37,794 INFO L130 PetriNetUnfolder]: 3/236 cut-off events. [2022-11-20 10:38:37,795 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:38:37,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 236 events. 3/236 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 525 event pairs, 0 based on Foata normal form. 2/235 useless extension candidates. Maximal degree in co-relation 298. Up to 15 conditions per place. [2022-11-20 10:38:37,797 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 15 selfloop transitions, 9 changer transitions 0/179 dead transitions. [2022-11-20 10:38:37,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 179 transitions, 443 flow [2022-11-20 10:38:37,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:38:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 10:38:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1592 transitions. [2022-11-20 10:38:37,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.772440562833576 [2022-11-20 10:38:37,802 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1592 transitions. [2022-11-20 10:38:37,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1592 transitions. [2022-11-20 10:38:37,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:38:37,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1592 transitions. [2022-11-20 10:38:37,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.88888888888889) internal successors, (1592), 9 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,815 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,815 INFO L175 Difference]: Start difference. First operand has 182 places, 169 transitions, 373 flow. Second operand 9 states and 1592 transitions. [2022-11-20 10:38:37,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 179 transitions, 443 flow [2022-11-20 10:38:37,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 179 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 10:38:37,819 INFO L231 Difference]: Finished difference. Result has 192 places, 175 transitions, 421 flow [2022-11-20 10:38:37,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=421, PETRI_PLACES=192, PETRI_TRANSITIONS=175} [2022-11-20 10:38:37,821 INFO L288 CegarLoopForPetriNet]: 198 programPoint places, -6 predicate places. [2022-11-20 10:38:37,821 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 175 transitions, 421 flow [2022-11-20 10:38:37,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:37,822 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:38:37,823 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:37,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:38,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431ef629-3aa0-47e6-be22-ba386750e8ec/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:38,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:38:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:38,034 INFO L85 PathProgramCache]: Analyzing trace with hash -474641827, now seen corresponding path program 1 times [2022-11-20 10:38:38,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:38,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180300049] [2022-11-20 10:38:38,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:38,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 10:38:38,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:38,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180300049] [2022-11-20 10:38:38,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180300049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:38,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:38,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:38:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788974097] [2022-11-20 10:38:38,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:38,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:38:38,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:38:38,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:38,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 229 [2022-11-20 10:38:38,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 175 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 157.6) internal successors, (788), 5 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:38,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:38:38,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 229 [2022-11-20 10:38:38,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand