./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:51:42,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:51:42,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:51:42,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:51:42,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:51:42,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:51:42,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:51:42,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:51:42,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:51:42,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:51:42,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:51:42,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:51:42,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:51:42,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:51:42,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:51:42,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:51:42,312 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:51:42,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:51:42,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:51:42,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:51:42,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:51:42,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:51:42,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:51:42,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:51:42,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:51:42,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:51:42,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:51:42,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:51:42,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:51:42,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:51:42,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:51:42,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:51:42,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:51:42,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:51:42,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:51:42,329 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:51:42,330 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:51:42,330 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:51:42,330 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:51:42,331 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:51:42,332 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:51:42,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:51:42,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:51:42,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:51:42,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:51:42,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:51:42,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:51:42,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:51:42,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:51:42,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:51:42,353 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:51:42,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:51:42,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:51:42,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:51:42,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:51:42,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:51:42,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:51:42,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:51:42,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:51:42,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:51:42,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:51:42,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:51:42,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:51:42,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:51:42,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:51:42,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:51:42,358 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:51:42,358 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3f647420f42d7fdb333957b618cdd528a4c5a4cecdb35105a1a2630df70b3d6 [2022-12-13 18:51:42,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:51:42,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:51:42,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:51:42,556 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:51:42,556 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:51:42,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2022-12-13 18:51:45,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:51:45,407 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:51:45,407 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i [2022-12-13 18:51:45,418 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/data/a5e0eaffa/5999febf3a48402a90e938f23bc02d86/FLAGdb333a2fb [2022-12-13 18:51:45,430 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/data/a5e0eaffa/5999febf3a48402a90e938f23bc02d86 [2022-12-13 18:51:45,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:51:45,434 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:51:45,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:51:45,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:51:45,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:51:45,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dbc6db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45, skipping insertion in model container [2022-12-13 18:51:45,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:51:45,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:51:45,687 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_628fd728-d9f0-472b-9a61-c2715ea28018/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2022-12-13 18:51:45,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:51:45,701 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:51:45,753 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_628fd728-d9f0-472b-9a61-c2715ea28018/sv-benchmarks/c/pthread-ext/29_conditionals_vs.i[30422,30435] [2022-12-13 18:51:45,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:51:45,805 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:51:45,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45 WrapperNode [2022-12-13 18:51:45,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:51:45,806 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:51:45,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:51:45,807 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:51:45,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,844 INFO L138 Inliner]: procedures = 170, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 59 [2022-12-13 18:51:45,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:51:45,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:51:45,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:51:45,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:51:45,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,865 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:51:45,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:51:45,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:51:45,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:51:45,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (1/1) ... [2022-12-13 18:51:45,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:51:45,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:51:45,895 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:51:45,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_628fd728-d9f0-472b-9a61-c2715ea28018/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:51:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 18:51:45,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 18:51:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:51:45,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:51:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:51:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:51:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:51:45,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:51:45,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:51:45,931 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 18:51:46,026 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:51:46,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:51:46,146 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:51:46,179 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:51:46,179 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 18:51:46,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:51:46 BoogieIcfgContainer [2022-12-13 18:51:46,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:51:46,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:51:46,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:51:46,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:51:46,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:51:45" (1/3) ... [2022-12-13 18:51:46,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6a6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:51:46, skipping insertion in model container [2022-12-13 18:51:46,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:51:45" (2/3) ... [2022-12-13 18:51:46,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6a6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:51:46, skipping insertion in model container [2022-12-13 18:51:46,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:51:46" (3/3) ... [2022-12-13 18:51:46,187 INFO L112 eAbstractionObserver]: Analyzing ICFG 29_conditionals_vs.i [2022-12-13 18:51:46,194 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 18:51:46,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:51:46,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:51:46,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 18:51:46,233 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:46,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,283 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2022-12-13 18:51:46,283 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:46,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 6/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 40. Up to 4 conditions per place. [2022-12-13 18:51:46,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,292 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:46,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 117 flow [2022-12-13 18:51:46,314 INFO L130 PetriNetUnfolder]: 6/67 cut-off events. [2022-12-13 18:51:46,314 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:46,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 67 events. 6/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 40. Up to 4 conditions per place. [2022-12-13 18:51:46,315 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2022-12-13 18:51:47,767 INFO L134 LiptonReduction]: Checked pairs total: 602 [2022-12-13 18:51:47,767 INFO L136 LiptonReduction]: Total number of compositions: 58 [2022-12-13 18:51:47,781 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:51:47,786 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:51:47,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 18:51:47,789 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 18:51:47,789 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:47,789 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:47,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:51:47,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:51:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:47,796 INFO L85 PathProgramCache]: Analyzing trace with hash 9245958, now seen corresponding path program 1 times [2022-12-13 18:51:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:47,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366070620] [2022-12-13 18:51:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:47,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:47,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:47,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366070620] [2022-12-13 18:51:47,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366070620] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:47,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:47,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:51:47,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706425402] [2022-12-13 18:51:47,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:47,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:51:47,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:51:47,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:51:47,954 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 114 [2022-12-13 18:51:47,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:47,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:47,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 114 [2022-12-13 18:51:47,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:47,972 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-13 18:51:47,972 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2022-12-13 18:51:47,973 INFO L137 encePairwiseOnDemand]: 112/114 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2022-12-13 18:51:47,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2022-12-13 18:51:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:51:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:51:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 105 transitions. [2022-12-13 18:51:47,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4605263157894737 [2022-12-13 18:51:47,983 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 105 transitions. [2022-12-13 18:51:47,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 105 transitions. [2022-12-13 18:51:47,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:47,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 105 transitions. [2022-12-13 18:51:47,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 52.5) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:47,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:47,991 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:47,993 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 105 transitions. [2022-12-13 18:51:47,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2022-12-13 18:51:47,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 18:51:47,997 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2022-12-13 18:51:47,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2022-12-13 18:51:48,002 INFO L288 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2022-12-13 18:51:48,002 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2022-12-13 18:51:48,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:48,003 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:48,003 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 18:51:48,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:51:48,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:51:48,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 295397748, now seen corresponding path program 1 times [2022-12-13 18:51:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:48,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21936542] [2022-12-13 18:51:48,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:48,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:48,025 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:51:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:48,062 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:51:48,063 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:51:48,064 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 18:51:48,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 18:51:48,066 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 18:51:48,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:51:48,067 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:51:48,070 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:51:48,070 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 18:51:48,085 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:48,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,108 INFO L130 PetriNetUnfolder]: 11/108 cut-off events. [2022-12-13 18:51:48,108 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:51:48,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 68. Up to 6 conditions per place. [2022-12-13 18:51:48,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,111 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:48,111 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,112 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 84 transitions, 180 flow [2022-12-13 18:51:48,129 INFO L130 PetriNetUnfolder]: 11/108 cut-off events. [2022-12-13 18:51:48,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 18:51:48,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 108 events. 11/108 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 183 event pairs, 0 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 68. Up to 6 conditions per place. [2022-12-13 18:51:48,132 INFO L119 LiptonReduction]: Number of co-enabled transitions 3024 [2022-12-13 18:51:49,740 INFO L134 LiptonReduction]: Checked pairs total: 2840 [2022-12-13 18:51:49,740 INFO L136 LiptonReduction]: Total number of compositions: 87 [2022-12-13 18:51:49,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:51:49,744 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:51:49,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 18:51:49,746 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 18:51:49,746 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:49,746 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:49,746 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:51:49,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 18:51:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:49,747 INFO L85 PathProgramCache]: Analyzing trace with hash 15359510, now seen corresponding path program 1 times [2022-12-13 18:51:49,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:49,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944278860] [2022-12-13 18:51:49,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:49,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:49,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944278860] [2022-12-13 18:51:49,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944278860] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:49,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:49,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:51:49,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971252422] [2022-12-13 18:51:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:51:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:51:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:51:49,769 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 171 [2022-12-13 18:51:49,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:49,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:49,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 171 [2022-12-13 18:51:49,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:49,790 INFO L130 PetriNetUnfolder]: 20/57 cut-off events. [2022-12-13 18:51:49,790 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-12-13 18:51:49,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 57 events. 20/57 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 161 event pairs, 20 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 28. Up to 47 conditions per place. [2022-12-13 18:51:49,790 INFO L137 encePairwiseOnDemand]: 167/171 looper letters, 8 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2022-12-13 18:51:49,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 11 transitions, 50 flow [2022-12-13 18:51:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:51:49,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:51:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2022-12-13 18:51:49,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2022-12-13 18:51:49,792 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2022-12-13 18:51:49,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2022-12-13 18:51:49,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:49,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2022-12-13 18:51:49,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:49,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:49,794 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:49,794 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 2 states and 156 transitions. [2022-12-13 18:51:49,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 11 transitions, 50 flow [2022-12-13 18:51:49,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 11 transitions, 48 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 18:51:49,795 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 32 flow [2022-12-13 18:51:49,795 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2022-12-13 18:51:49,795 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -3 predicate places. [2022-12-13 18:51:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 32 flow [2022-12-13 18:51:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:49,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:49,796 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 18:51:49,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:51:49,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 18:51:49,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1356344765, now seen corresponding path program 1 times [2022-12-13 18:51:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:49,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859077187] [2022-12-13 18:51:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:49,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:49,808 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:51:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:49,819 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:51:49,819 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:51:49,819 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 18:51:49,819 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 18:51:49,819 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 18:51:49,819 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 18:51:49,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:51:49,820 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:51:49,820 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:51:49,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 18:51:49,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:49,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,852 INFO L130 PetriNetUnfolder]: 16/149 cut-off events. [2022-12-13 18:51:49,852 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 18:51:49,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 149 events. 16/149 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 333 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2022-12-13 18:51:49,853 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:49,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,855 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 112 transitions, 245 flow [2022-12-13 18:51:49,866 INFO L130 PetriNetUnfolder]: 16/149 cut-off events. [2022-12-13 18:51:49,866 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 18:51:49,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 149 events. 16/149 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 333 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 112. Up to 8 conditions per place. [2022-12-13 18:51:49,870 INFO L119 LiptonReduction]: Number of co-enabled transitions 6804 [2022-12-13 18:51:52,356 INFO L134 LiptonReduction]: Checked pairs total: 7174 [2022-12-13 18:51:52,356 INFO L136 LiptonReduction]: Total number of compositions: 121 [2022-12-13 18:51:52,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:51:52,359 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:51:52,359 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 18:51:52,361 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 18:51:52,361 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:52,361 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:52,361 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:51:52,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 18:51:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 23235449, now seen corresponding path program 1 times [2022-12-13 18:51:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564998617] [2022-12-13 18:51:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:52,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564998617] [2022-12-13 18:51:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564998617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:52,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:52,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:51:52,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349032432] [2022-12-13 18:51:52,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:52,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:51:52,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:51:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:51:52,380 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 233 [2022-12-13 18:51:52,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 65 flow. Second operand has 2 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:52,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:52,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 233 [2022-12-13 18:51:52,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:52,426 INFO L130 PetriNetUnfolder]: 110/225 cut-off events. [2022-12-13 18:51:52,427 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-12-13 18:51:52,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 225 events. 110/225 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 913 event pairs, 110 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 127. Up to 191 conditions per place. [2022-12-13 18:51:52,428 INFO L137 encePairwiseOnDemand]: 227/233 looper letters, 11 selfloop transitions, 0 changer transitions 0/14 dead transitions. [2022-12-13 18:51:52,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 14 transitions, 71 flow [2022-12-13 18:51:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:51:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:51:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 207 transitions. [2022-12-13 18:51:52,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44420600858369097 [2022-12-13 18:51:52,429 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 207 transitions. [2022-12-13 18:51:52,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 207 transitions. [2022-12-13 18:51:52,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:52,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 207 transitions. [2022-12-13 18:51:52,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 103.5) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:52,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:52,432 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:52,432 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 65 flow. Second operand 2 states and 207 transitions. [2022-12-13 18:51:52,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 14 transitions, 71 flow [2022-12-13 18:51:52,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 65 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-12-13 18:51:52,432 INFO L231 Difference]: Finished difference. Result has 22 places, 14 transitions, 43 flow [2022-12-13 18:51:52,432 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=43, PETRI_PLACES=22, PETRI_TRANSITIONS=14} [2022-12-13 18:51:52,433 INFO L288 CegarLoopForPetriNet]: 27 programPoint places, -5 predicate places. [2022-12-13 18:51:52,433 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 14 transitions, 43 flow [2022-12-13 18:51:52,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 97.0) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:52,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:52,433 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 18:51:52,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:51:52,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 18:51:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:52,434 INFO L85 PathProgramCache]: Analyzing trace with hash -937016464, now seen corresponding path program 1 times [2022-12-13 18:51:52,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:52,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013225541] [2022-12-13 18:51:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:52,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:52,444 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:51:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:52,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:51:52,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:51:52,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 18:51:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 18:51:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 18:51:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 18:51:52,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 18:51:52,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 18:51:52,455 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:51:52,455 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:51:52,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 18:51:52,474 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:52,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,498 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2022-12-13 18:51:52,498 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 18:51:52,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 485 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2022-12-13 18:51:52,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:52,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 140 transitions, 312 flow [2022-12-13 18:51:52,515 INFO L130 PetriNetUnfolder]: 21/190 cut-off events. [2022-12-13 18:51:52,515 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 18:51:52,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 190 events. 21/190 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 485 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2022-12-13 18:51:52,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 12096 [2022-12-13 18:51:55,634 INFO L134 LiptonReduction]: Checked pairs total: 11761 [2022-12-13 18:51:55,634 INFO L136 LiptonReduction]: Total number of compositions: 153 [2022-12-13 18:51:55,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:51:55,637 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:51:55,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 18:51:55,638 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 18:51:55,638 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:55,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:55,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:51:55,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 18:51:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash 33044973, now seen corresponding path program 1 times [2022-12-13 18:51:55,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:55,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441078009] [2022-12-13 18:51:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:55,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441078009] [2022-12-13 18:51:55,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441078009] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:55,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:55,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:51:55,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655116730] [2022-12-13 18:51:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:51:55,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:55,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:51:55,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:51:55,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 293 [2022-12-13 18:51:55,653 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 120.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:55,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:55,654 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 293 [2022-12-13 18:51:55,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:55,745 INFO L130 PetriNetUnfolder]: 488/837 cut-off events. [2022-12-13 18:51:55,745 INFO L131 PetriNetUnfolder]: For 448/448 co-relation queries the response was YES. [2022-12-13 18:51:55,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 837 events. 488/837 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3926 event pairs, 488 based on Foata normal form. 0/796 useless extension candidates. Maximal degree in co-relation 511. Up to 731 conditions per place. [2022-12-13 18:51:55,749 INFO L137 encePairwiseOnDemand]: 287/293 looper letters, 14 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2022-12-13 18:51:55,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 17 transitions, 94 flow [2022-12-13 18:51:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:51:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:51:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-12-13 18:51:55,751 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43686006825938567 [2022-12-13 18:51:55,751 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-12-13 18:51:55,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-12-13 18:51:55,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:55,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-12-13 18:51:55,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:55,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:55,754 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 293.0) internal successors, (879), 3 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:55,755 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 80 flow. Second operand 2 states and 256 transitions. [2022-12-13 18:51:55,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 17 transitions, 94 flow [2022-12-13 18:51:55,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 17 transitions, 82 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-13 18:51:55,757 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 54 flow [2022-12-13 18:51:55,757 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 18:51:55,757 INFO L288 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2022-12-13 18:51:55,757 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 54 flow [2022-12-13 18:51:55,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.0) internal successors, (240), 2 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:55,758 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:55,758 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 18:51:55,758 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 18:51:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:55,759 INFO L85 PathProgramCache]: Analyzing trace with hash 393468514, now seen corresponding path program 1 times [2022-12-13 18:51:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:55,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802721762] [2022-12-13 18:51:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:55,770 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:51:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:55,779 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:51:55,779 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:51:55,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 18:51:55,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 18:51:55,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 18:51:55,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 18:51:55,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 18:51:55,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 18:51:55,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 18:51:55,780 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:51:55,781 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:51:55,781 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 18:51:55,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:55,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,815 INFO L130 PetriNetUnfolder]: 26/231 cut-off events. [2022-12-13 18:51:55,816 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 18:51:55,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 231 events. 26/231 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 630 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2022-12-13 18:51:55,817 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,818 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,818 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:55,818 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 168 transitions, 381 flow [2022-12-13 18:51:55,846 INFO L130 PetriNetUnfolder]: 26/231 cut-off events. [2022-12-13 18:51:55,846 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 18:51:55,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 231 events. 26/231 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 630 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 203. Up to 12 conditions per place. [2022-12-13 18:51:55,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 18900 [2022-12-13 18:51:59,364 INFO L134 LiptonReduction]: Checked pairs total: 18377 [2022-12-13 18:51:59,364 INFO L136 LiptonReduction]: Total number of compositions: 187 [2022-12-13 18:51:59,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:51:59,365 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:51:59,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 18:51:59,366 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 18:51:59,367 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:51:59,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:59,367 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:51:59,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 18:51:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:59,367 INFO L85 PathProgramCache]: Analyzing trace with hash 45019628, now seen corresponding path program 1 times [2022-12-13 18:51:59,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535656895] [2022-12-13 18:51:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:59,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:51:59,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:59,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535656895] [2022-12-13 18:51:59,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535656895] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:51:59,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:51:59,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:51:59,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105711152] [2022-12-13 18:51:59,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:51:59,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:51:59,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:59,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:51:59,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:51:59,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 355 [2022-12-13 18:51:59,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 105 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:59,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:51:59,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 355 [2022-12-13 18:51:59,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:51:59,740 INFO L130 PetriNetUnfolder]: 2459/3672 cut-off events. [2022-12-13 18:51:59,740 INFO L131 PetriNetUnfolder]: For 2176/2176 co-relation queries the response was YES. [2022-12-13 18:51:59,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8101 conditions, 3672 events. 2459/3672 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 18790 event pairs, 2459 based on Foata normal form. 162/3470 useless extension candidates. Maximal degree in co-relation 2302. Up to 3350 conditions per place. [2022-12-13 18:51:59,762 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 18 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-12-13 18:51:59,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 21 transitions, 123 flow [2022-12-13 18:51:59,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:51:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:51:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 308 transitions. [2022-12-13 18:51:59,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43380281690140843 [2022-12-13 18:51:59,764 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 308 transitions. [2022-12-13 18:51:59,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 308 transitions. [2022-12-13 18:51:59,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:51:59,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 308 transitions. [2022-12-13 18:51:59,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 154.0) internal successors, (308), 2 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:59,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:59,766 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:59,766 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 105 flow. Second operand 2 states and 308 transitions. [2022-12-13 18:51:59,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 21 transitions, 123 flow [2022-12-13 18:51:59,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 103 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-12-13 18:51:59,769 INFO L231 Difference]: Finished difference. Result has 33 places, 21 transitions, 67 flow [2022-12-13 18:51:59,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=67, PETRI_PLACES=33, PETRI_TRANSITIONS=21} [2022-12-13 18:51:59,769 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -6 predicate places. [2022-12-13 18:51:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 21 transitions, 67 flow [2022-12-13 18:51:59,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:59,770 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:51:59,770 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 18:51:59,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 18:51:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1590492050, now seen corresponding path program 1 times [2022-12-13 18:51:59,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:59,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408230519] [2022-12-13 18:51:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:59,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:59,780 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:51:59,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:51:59,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:51:59,790 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 18:51:59,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 18:51:59,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 18:51:59,791 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:51:59,792 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:51:59,792 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-13 18:51:59,806 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:51:59,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,831 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2022-12-13 18:51:59,831 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 18:51:59,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 272 events. 31/272 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 747 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 250. Up to 14 conditions per place. [2022-12-13 18:51:59,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,835 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:51:59,835 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 196 transitions, 452 flow [2022-12-13 18:51:59,858 INFO L130 PetriNetUnfolder]: 31/272 cut-off events. [2022-12-13 18:51:59,859 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 18:51:59,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 272 events. 31/272 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 747 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 250. Up to 14 conditions per place. [2022-12-13 18:51:59,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 27216 [2022-12-13 18:52:03,555 INFO L134 LiptonReduction]: Checked pairs total: 24792 [2022-12-13 18:52:03,555 INFO L136 LiptonReduction]: Total number of compositions: 215 [2022-12-13 18:52:03,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:52:03,556 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:52:03,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 18:52:03,557 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 18:52:03,558 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:52:03,558 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:03,558 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:52:03,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 18:52:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:03,558 INFO L85 PathProgramCache]: Analyzing trace with hash 58414707, now seen corresponding path program 1 times [2022-12-13 18:52:03,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:03,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667159232] [2022-12-13 18:52:03,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:03,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:03,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:52:03,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667159232] [2022-12-13 18:52:03,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667159232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:52:03,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:52:03,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:52:03,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274909865] [2022-12-13 18:52:03,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:52:03,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:52:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:52:03,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:52:03,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:52:03,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 411 [2022-12-13 18:52:03,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 124 flow. Second operand has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:03,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:03,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 411 [2022-12-13 18:52:03,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:04,555 INFO L130 PetriNetUnfolder]: 7292/10449 cut-off events. [2022-12-13 18:52:04,555 INFO L131 PetriNetUnfolder]: For 9628/9628 co-relation queries the response was YES. [2022-12-13 18:52:04,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23762 conditions, 10449 events. 7292/10449 cut-off events. For 9628/9628 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 57324 event pairs, 7292 based on Foata normal form. 0/10085 useless extension candidates. Maximal degree in co-relation 6946. Up to 9479 conditions per place. [2022-12-13 18:52:04,593 INFO L137 encePairwiseOnDemand]: 403/411 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2022-12-13 18:52:04,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 23 transitions, 146 flow [2022-12-13 18:52:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:52:04,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:52:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 356 transitions. [2022-12-13 18:52:04,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43309002433090027 [2022-12-13 18:52:04,594 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 356 transitions. [2022-12-13 18:52:04,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 356 transitions. [2022-12-13 18:52:04,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:04,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 356 transitions. [2022-12-13 18:52:04,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 178.0) internal successors, (356), 2 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:04,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:04,597 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:04,597 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 124 flow. Second operand 2 states and 356 transitions. [2022-12-13 18:52:04,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 23 transitions, 146 flow [2022-12-13 18:52:04,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 23 transitions, 116 flow, removed 15 selfloop flow, removed 0 redundant places. [2022-12-13 18:52:04,605 INFO L231 Difference]: Finished difference. Result has 37 places, 23 transitions, 76 flow [2022-12-13 18:52:04,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=23} [2022-12-13 18:52:04,605 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -7 predicate places. [2022-12-13 18:52:04,605 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 23 transitions, 76 flow [2022-12-13 18:52:04,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 166.0) internal successors, (332), 2 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:04,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:04,605 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:04,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:52:04,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 18:52:04,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1375157805, now seen corresponding path program 1 times [2022-12-13 18:52:04,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:04,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182611332] [2022-12-13 18:52:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:04,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:04,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:52:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:04,626 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:52:04,626 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-12-13 18:52:04,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-12-13 18:52:04,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:52:04,627 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:52:04,628 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:52:04,628 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-12-13 18:52:04,649 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:52:04,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,699 INFO L130 PetriNetUnfolder]: 36/313 cut-off events. [2022-12-13 18:52:04,700 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 18:52:04,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 313 events. 36/313 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 894 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2022-12-13 18:52:04,701 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,703 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,703 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:52:04,704 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,704 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 224 transitions, 525 flow [2022-12-13 18:52:04,732 INFO L130 PetriNetUnfolder]: 36/313 cut-off events. [2022-12-13 18:52:04,732 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 18:52:04,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 313 events. 36/313 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 894 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 300. Up to 16 conditions per place. [2022-12-13 18:52:04,742 INFO L119 LiptonReduction]: Number of co-enabled transitions 37044 [2022-12-13 18:52:09,764 INFO L134 LiptonReduction]: Checked pairs total: 36627 [2022-12-13 18:52:09,764 INFO L136 LiptonReduction]: Total number of compositions: 249 [2022-12-13 18:52:09,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:52:09,766 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:52:09,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 18:52:09,766 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 18:52:09,766 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:52:09,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:09,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:52:09,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 18:52:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:09,767 INFO L85 PathProgramCache]: Analyzing trace with hash 73415487, now seen corresponding path program 1 times [2022-12-13 18:52:09,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:09,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405079178] [2022-12-13 18:52:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:09,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:09,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:52:09,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405079178] [2022-12-13 18:52:09,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405079178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:52:09,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:52:09,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:52:09,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974076988] [2022-12-13 18:52:09,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:52:09,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:52:09,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:52:09,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:52:09,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:52:09,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 473 [2022-12-13 18:52:09,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 153 flow. Second operand has 2 states, 2 states have (on average 189.0) internal successors, (378), 2 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:09,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:09,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 473 [2022-12-13 18:52:09,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:13,170 INFO L130 PetriNetUnfolder]: 26246/35721 cut-off events. [2022-12-13 18:52:13,170 INFO L131 PetriNetUnfolder]: For 40003/40003 co-relation queries the response was YES. [2022-12-13 18:52:13,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81840 conditions, 35721 events. 26246/35721 cut-off events. For 40003/40003 co-relation queries the response was YES. Maximal size of possible extension queue 1425. Compared 205737 event pairs, 26246 based on Foata normal form. 0/34627 useless extension candidates. Maximal degree in co-relation 24361. Up to 32807 conditions per place. [2022-12-13 18:52:13,341 INFO L137 encePairwiseOnDemand]: 463/473 looper letters, 23 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2022-12-13 18:52:13,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 26 transitions, 175 flow [2022-12-13 18:52:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:52:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:52:13,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 407 transitions. [2022-12-13 18:52:13,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2022-12-13 18:52:13,343 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 407 transitions. [2022-12-13 18:52:13,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 407 transitions. [2022-12-13 18:52:13,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:13,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 407 transitions. [2022-12-13 18:52:13,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 203.5) internal successors, (407), 2 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:13,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:13,346 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 473.0) internal successors, (1419), 3 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:13,346 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 153 flow. Second operand 2 states and 407 transitions. [2022-12-13 18:52:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 26 transitions, 175 flow [2022-12-13 18:52:13,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 26 transitions, 133 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-12-13 18:52:13,443 INFO L231 Difference]: Finished difference. Result has 42 places, 26 transitions, 87 flow [2022-12-13 18:52:13,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=473, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=26} [2022-12-13 18:52:13,444 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -9 predicate places. [2022-12-13 18:52:13,444 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 26 transitions, 87 flow [2022-12-13 18:52:13,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 189.0) internal successors, (378), 2 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:13,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:13,445 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:13,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:52:13,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 18:52:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:13,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2066794980, now seen corresponding path program 1 times [2022-12-13 18:52:13,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:13,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662377314] [2022-12-13 18:52:13,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:13,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:13,461 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:52:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:13,476 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:52:13,476 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-12-13 18:52:13,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-12-13 18:52:13,478 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-12-13 18:52:13,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 18:52:13,478 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:52:13,478 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:52:13,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-12-13 18:52:13,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:52:13,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,535 INFO L130 PetriNetUnfolder]: 41/354 cut-off events. [2022-12-13 18:52:13,535 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-13 18:52:13,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 354 events. 41/354 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1039 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 351. Up to 18 conditions per place. [2022-12-13 18:52:13,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,540 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:52:13,541 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,541 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 236 places, 252 transitions, 600 flow [2022-12-13 18:52:13,598 INFO L130 PetriNetUnfolder]: 41/354 cut-off events. [2022-12-13 18:52:13,598 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-12-13 18:52:13,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 415 conditions, 354 events. 41/354 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1039 event pairs, 0 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 351. Up to 18 conditions per place. [2022-12-13 18:52:13,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 48384 [2022-12-13 18:52:19,268 INFO L134 LiptonReduction]: Checked pairs total: 48465 [2022-12-13 18:52:19,269 INFO L136 LiptonReduction]: Total number of compositions: 285 [2022-12-13 18:52:19,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:52:19,271 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:52:19,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-12-13 18:52:19,271 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 18:52:19,271 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:52:19,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:19,272 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:52:19,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-12-13 18:52:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash 90624701, now seen corresponding path program 1 times [2022-12-13 18:52:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:19,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537439320] [2022-12-13 18:52:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:19,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:52:19,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537439320] [2022-12-13 18:52:19,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537439320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:52:19,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:52:19,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:52:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159264336] [2022-12-13 18:52:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:52:19,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:52:19,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:52:19,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:52:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:52:19,282 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 537 [2022-12-13 18:52:19,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 176 flow. Second operand has 2 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:19,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:19,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 537 [2022-12-13 18:52:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:52:31,212 INFO L130 PetriNetUnfolder]: 91856/120285 cut-off events. [2022-12-13 18:52:31,212 INFO L131 PetriNetUnfolder]: For 158830/158830 co-relation queries the response was YES. [2022-12-13 18:52:31,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277213 conditions, 120285 events. 91856/120285 cut-off events. For 158830/158830 co-relation queries the response was YES. Maximal size of possible extension queue 4108. Compared 717096 event pairs, 91856 based on Foata normal form. 0/117004 useless extension candidates. Maximal degree in co-relation 83653. Up to 111539 conditions per place. [2022-12-13 18:52:31,748 INFO L137 encePairwiseOnDemand]: 527/537 looper letters, 26 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2022-12-13 18:52:31,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 29 transitions, 206 flow [2022-12-13 18:52:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:52:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:52:31,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 456 transitions. [2022-12-13 18:52:31,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4245810055865922 [2022-12-13 18:52:31,750 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 456 transitions. [2022-12-13 18:52:31,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 456 transitions. [2022-12-13 18:52:31,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:52:31,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 456 transitions. [2022-12-13 18:52:31,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 228.0) internal successors, (456), 2 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 537.0) internal successors, (1611), 3 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,754 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 537.0) internal successors, (1611), 3 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,754 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 176 flow. Second operand 2 states and 456 transitions. [2022-12-13 18:52:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 29 transitions, 206 flow [2022-12-13 18:52:31,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 29 transitions, 150 flow, removed 28 selfloop flow, removed 0 redundant places. [2022-12-13 18:52:31,875 INFO L231 Difference]: Finished difference. Result has 47 places, 29 transitions, 98 flow [2022-12-13 18:52:31,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=29} [2022-12-13 18:52:31,876 INFO L288 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2022-12-13 18:52:31,876 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 29 transitions, 98 flow [2022-12-13 18:52:31,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:31,876 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:31,877 INFO L209 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:52:31,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:52:31,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-12-13 18:52:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:31,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1787766798, now seen corresponding path program 1 times [2022-12-13 18:52:31,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:31,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300784116] [2022-12-13 18:52:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:31,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:31,892 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:52:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:52:31,910 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:52:31,910 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:52:31,910 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-12-13 18:52:31,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2022-12-13 18:52:31,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2022-12-13 18:52:31,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2022-12-13 18:52:31,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2022-12-13 18:52:31,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2022-12-13 18:52:31,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2022-12-13 18:52:31,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2022-12-13 18:52:31,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2022-12-13 18:52:31,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2022-12-13 18:52:31,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 18:52:31,911 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:52:31,912 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:52:31,912 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2022-12-13 18:52:31,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:52:31,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,096 INFO L130 PetriNetUnfolder]: 46/395 cut-off events. [2022-12-13 18:52:32,096 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-12-13 18:52:32,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 395 events. 46/395 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1187 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 403. Up to 20 conditions per place. [2022-12-13 18:52:32,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,102 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:52:32,102 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 280 transitions, 677 flow [2022-12-13 18:52:32,147 INFO L130 PetriNetUnfolder]: 46/395 cut-off events. [2022-12-13 18:52:32,147 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-12-13 18:52:32,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468 conditions, 395 events. 46/395 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1187 event pairs, 0 based on Foata normal form. 0/330 useless extension candidates. Maximal degree in co-relation 403. Up to 20 conditions per place. [2022-12-13 18:52:32,163 INFO L119 LiptonReduction]: Number of co-enabled transitions 61236 [2022-12-13 18:52:37,810 INFO L134 LiptonReduction]: Checked pairs total: 62967 [2022-12-13 18:52:37,810 INFO L136 LiptonReduction]: Total number of compositions: 316 [2022-12-13 18:52:37,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:52:37,812 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:52:37,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-13 18:52:37,813 INFO L130 PetriNetUnfolder]: 1/8 cut-off events. [2022-12-13 18:52:37,813 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:52:37,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:52:37,813 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:52:37,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2022-12-13 18:52:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:52:37,813 INFO L85 PathProgramCache]: Analyzing trace with hash 110328796, now seen corresponding path program 1 times [2022-12-13 18:52:37,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:52:37,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087557404] [2022-12-13 18:52:37,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:52:37,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:52:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:52:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:52:37,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:52:37,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087557404] [2022-12-13 18:52:37,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087557404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:52:37,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:52:37,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:52:37,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303305608] [2022-12-13 18:52:37,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:52:37,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:52:37,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:52:37,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:52:37,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:52:37,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 596 [2022-12-13 18:52:37,824 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 50 transitions, 217 flow. Second operand has 2 states, 2 states have (on average 235.0) internal successors, (470), 2 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:52:37,824 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:52:37,825 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 596 [2022-12-13 18:52:37,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 18:53:32,839 INFO L130 PetriNetUnfolder]: 426467/540187 cut-off events. [2022-12-13 18:53:32,839 INFO L131 PetriNetUnfolder]: For 812470/812470 co-relation queries the response was YES. [2022-12-13 18:53:34,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1248785 conditions, 540187 events. 426467/540187 cut-off events. For 812470/812470 co-relation queries the response was YES. Maximal size of possible extension queue 15974. Compared 3372368 event pairs, 426467 based on Foata normal form. 19682/527065 useless extension candidates. Maximal degree in co-relation 347730. Up to 505198 conditions per place. [2022-12-13 18:53:35,834 INFO L137 encePairwiseOnDemand]: 582/596 looper letters, 30 selfloop transitions, 0 changer transitions 0/33 dead transitions. [2022-12-13 18:53:35,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 33 transitions, 243 flow [2022-12-13 18:53:35,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:53:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 18:53:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 510 transitions. [2022-12-13 18:53:35,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4278523489932886 [2022-12-13 18:53:35,837 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 510 transitions. [2022-12-13 18:53:35,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 510 transitions. [2022-12-13 18:53:35,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 18:53:35,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 510 transitions. [2022-12-13 18:53:35,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:35,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 596.0) internal successors, (1788), 3 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:35,841 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 596.0) internal successors, (1788), 3 states have internal predecessors, (1788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:35,841 INFO L175 Difference]: Start difference. First operand has 65 places, 50 transitions, 217 flow. Second operand 2 states and 510 transitions. [2022-12-13 18:53:35,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 33 transitions, 243 flow [2022-12-13 18:53:37,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 33 transitions, 171 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-12-13 18:53:37,096 INFO L231 Difference]: Finished difference. Result has 53 places, 33 transitions, 111 flow [2022-12-13 18:53:37,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=596, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=111, PETRI_PLACES=53, PETRI_TRANSITIONS=33} [2022-12-13 18:53:37,097 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -12 predicate places. [2022-12-13 18:53:37,097 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 33 transitions, 111 flow [2022-12-13 18:53:37,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 235.0) internal successors, (470), 2 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:37,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:37,097 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:53:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 18:53:37,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2022-12-13 18:53:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash 847781185, now seen corresponding path program 1 times [2022-12-13 18:53:37,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:37,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056115569] [2022-12-13 18:53:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:37,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:53:37,114 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 18:53:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 18:53:37,132 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 18:53:37,132 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 18:53:37,132 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (9 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 11 remaining) [2022-12-13 18:53:37,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 11 remaining) [2022-12-13 18:53:37,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2022-12-13 18:53:37,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 11 remaining) [2022-12-13 18:53:37,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 18:53:37,134 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 18:53:37,135 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 18:53:37,135 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2022-12-13 18:53:37,164 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 18:53:37,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,242 INFO L130 PetriNetUnfolder]: 51/436 cut-off events. [2022-12-13 18:53:37,242 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 18:53:37,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 436 events. 51/436 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1330 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 456. Up to 22 conditions per place. [2022-12-13 18:53:37,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,248 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,248 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 18:53:37,248 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,248 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 288 places, 308 transitions, 756 flow [2022-12-13 18:53:37,310 INFO L130 PetriNetUnfolder]: 51/436 cut-off events. [2022-12-13 18:53:37,310 INFO L131 PetriNetUnfolder]: For 210/210 co-relation queries the response was YES. [2022-12-13 18:53:37,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 436 events. 51/436 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1330 event pairs, 0 based on Foata normal form. 0/364 useless extension candidates. Maximal degree in co-relation 456. Up to 22 conditions per place. [2022-12-13 18:53:37,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 75600 [2022-12-13 18:53:44,716 INFO L134 LiptonReduction]: Checked pairs total: 70590 [2022-12-13 18:53:44,716 INFO L136 LiptonReduction]: Total number of compositions: 345 [2022-12-13 18:53:44,717 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:53:44,718 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;@707f8ccc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:53:44,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-13 18:53:44,719 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 18:53:44,719 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 18:53:44,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 18:53:44,719 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 18:53:44,719 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 9 more)] === [2022-12-13 18:53:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:53:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash 130720950, now seen corresponding path program 1 times [2022-12-13 18:53:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:53:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263712886] [2022-12-13 18:53:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:53:44,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:53:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:53:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:53:44,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:53:44,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263712886] [2022-12-13 18:53:44,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263712886] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:53:44,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:53:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 18:53:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080159362] [2022-12-13 18:53:44,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:53:44,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:53:44,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:53:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:53:44,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 653 [2022-12-13 18:53:44,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 46 transitions, 232 flow. Second operand has 2 states, 2 states have (on average 258.0) internal successors, (516), 2 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:53:44,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 18:53:44,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 653 [2022-12-13 18:53:44,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand