./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 15:31:15,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:31:15,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:31:15,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:31:15,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:31:15,208 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:31:15,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:31:15,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:31:15,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:31:15,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:31:15,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:31:15,228 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:31:15,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:31:15,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:31:15,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:31:15,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:31:15,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:31:15,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:31:15,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:31:15,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:31:15,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:31:15,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:31:15,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:31:15,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:31:15,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:31:15,270 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:31:15,270 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:31:15,272 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:31:15,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:31:15,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:31:15,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:31:15,278 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:31:15,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:31:15,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:31:15,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:31:15,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:31:15,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:31:15,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:31:15,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:31:15,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:31:15,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:31:15,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:31:15,341 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:31:15,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:31:15,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:31:15,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:31:15,347 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:31:15,347 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:31:15,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:31:15,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:31:15,349 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:31:15,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:31:15,350 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:31:15,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:31:15,351 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:31:15,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:31:15,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:31:15,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:31:15,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:31:15,352 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:31:15,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:31:15,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:31:15,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:31:15,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:31:15,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:31:15,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:31:15,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:31:15,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:31:15,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:31:15,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:31:15,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:31:15,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:31:15,356 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:31:15,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:31:15,357 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:31:15,357 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:31:15,358 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_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-11-25 15:31:15,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:31:15,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:31:15,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:31:15,714 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:31:15,715 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:31:15,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-11-25 15:31:18,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:31:19,007 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:31:19,008 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-11-25 15:31:19,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/data/e85c38962/7e41694f3c514835b73913db797cd828/FLAG1d4804ce7 [2022-11-25 15:31:19,037 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/data/e85c38962/7e41694f3c514835b73913db797cd828 [2022-11-25 15:31:19,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:31:19,047 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:31:19,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:31:19,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:31:19,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:31:19,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45e515da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19, skipping insertion in model container [2022-11-25 15:31:19,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:31:19,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:31:19,521 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_73aab923-f5d5-43a1-b341-5c777b19e27b/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-11-25 15:31:19,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:31:19,576 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:31:19,639 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_73aab923-f5d5-43a1-b341-5c777b19e27b/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-11-25 15:31:19,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:31:19,699 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:31:19,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19 WrapperNode [2022-11-25 15:31:19,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:31:19,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:31:19,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:31:19,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:31:19,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,767 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-11-25 15:31:19,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:31:19,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:31:19,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:31:19,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:31:19,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,832 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:31:19,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:31:19,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:31:19,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:31:19,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (1/1) ... [2022-11-25 15:31:19,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:31:19,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:31:19,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:31:19,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73aab923-f5d5-43a1-b341-5c777b19e27b/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:31:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 15:31:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:31:19,905 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 15:31:19,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:31:19,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:31:19,906 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 15:31:19,906 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 15:31:19,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:31:19,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:31:19,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:31:19,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:31:19,908 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:31:20,081 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:31:20,083 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:31:20,433 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:31:20,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:31:20,442 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 15:31:20,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:31:20 BoogieIcfgContainer [2022-11-25 15:31:20,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:31:20,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:31:20,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:31:20,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:31:20,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:31:19" (1/3) ... [2022-11-25 15:31:20,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1194cc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:31:20, skipping insertion in model container [2022-11-25 15:31:20,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:31:19" (2/3) ... [2022-11-25 15:31:20,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1194cc8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:31:20, skipping insertion in model container [2022-11-25 15:31:20,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:31:20" (3/3) ... [2022-11-25 15:31:20,456 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-11-25 15:31:20,466 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:31:20,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:31:20,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:31:20,480 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:31:20,545 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 15:31:20,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 130 transitions, 268 flow [2022-11-25 15:31:20,661 INFO L130 PetriNetUnfolder]: 30/188 cut-off events. [2022-11-25 15:31:20,662 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:31:20,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 562 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-11-25 15:31:20,676 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 130 transitions, 268 flow [2022-11-25 15:31:20,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 125 transitions, 255 flow [2022-11-25 15:31:20,691 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:20,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 125 transitions, 255 flow [2022-11-25 15:31:20,735 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 125 transitions, 255 flow [2022-11-25 15:31:20,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 125 transitions, 255 flow [2022-11-25 15:31:20,819 INFO L130 PetriNetUnfolder]: 29/183 cut-off events. [2022-11-25 15:31:20,820 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:20,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 183 events. 29/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 547 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 94. Up to 6 conditions per place. [2022-11-25 15:31:20,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 3968 [2022-11-25 15:31:24,861 INFO L134 LiptonReduction]: Checked pairs total: 11300 [2022-11-25 15:31:24,861 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-11-25 15:31:24,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:24,892 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;@63509068, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:24,892 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:24,898 INFO L130 PetriNetUnfolder]: 6/22 cut-off events. [2022-11-25 15:31:24,898 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:24,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:24,899 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:31:24,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 479221142, now seen corresponding path program 1 times [2022-11-25 15:31:24,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:24,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874328306] [2022-11-25 15:31:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:24,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:25,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874328306] [2022-11-25 15:31:25,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874328306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:25,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:25,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674131394] [2022-11-25 15:31:25,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:25,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:25,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:25,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:25,305 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 236 [2022-11-25 15:31:25,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 53 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:25,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:25,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 236 [2022-11-25 15:31:25,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:25,465 INFO L130 PetriNetUnfolder]: 131/340 cut-off events. [2022-11-25 15:31:25,465 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:25,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 340 events. 131/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1440 event pairs, 60 based on Foata normal form. 60/362 useless extension candidates. Maximal degree in co-relation 601. Up to 261 conditions per place. [2022-11-25 15:31:25,469 INFO L137 encePairwiseOnDemand]: 217/236 looper letters, 31 selfloop transitions, 2 changer transitions 4/48 dead transitions. [2022-11-25 15:31:25,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 173 flow [2022-11-25 15:31:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:31:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:31:25,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2022-11-25 15:31:25,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5324858757062146 [2022-11-25 15:31:25,488 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2022-11-25 15:31:25,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2022-11-25 15:31:25,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:25,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2022-11-25 15:31:25,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:25,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:25,535 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:25,537 INFO L175 Difference]: Start difference. First operand has 40 places, 53 transitions, 111 flow. Second operand 3 states and 377 transitions. [2022-11-25 15:31:25,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 173 flow [2022-11-25 15:31:25,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:31:25,543 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 79 flow [2022-11-25 15:31:25,545 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2022-11-25 15:31:25,548 INFO L288 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2022-11-25 15:31:25,548 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 79 flow [2022-11-25 15:31:25,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:25,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:25,549 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 15:31:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:31:25,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:25,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1992402191, now seen corresponding path program 1 times [2022-11-25 15:31:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:25,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189299972] [2022-11-25 15:31:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:25,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:25,578 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:31:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:25,618 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:31:25,619 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:31:25,621 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:31:25,623 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:31:25,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 15:31:25,624 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:31:25,627 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:31:25,627 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 15:31:25,646 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 15:31:25,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,693 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-11-25 15:31:25,693 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:31:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-11-25 15:31:25,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,700 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:25,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,701 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 163 transitions, 344 flow [2022-11-25 15:31:25,742 INFO L130 PetriNetUnfolder]: 51/304 cut-off events. [2022-11-25 15:31:25,743 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:31:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 304 events. 51/304 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1036 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2022-11-25 15:31:25,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 10540 [2022-11-25 15:31:29,516 INFO L134 LiptonReduction]: Checked pairs total: 29478 [2022-11-25 15:31:29,516 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-25 15:31:29,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:29,521 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;@63509068, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:29,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:29,524 INFO L130 PetriNetUnfolder]: 6/22 cut-off events. [2022-11-25 15:31:29,525 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:29,525 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:29,525 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:31:29,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash 788081070, now seen corresponding path program 1 times [2022-11-25 15:31:29,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:29,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755032093] [2022-11-25 15:31:29,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:29,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:29,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:29,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755032093] [2022-11-25 15:31:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755032093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:29,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:29,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782743807] [2022-11-25 15:31:29,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:29,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:29,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:29,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:29,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 292 [2022-11-25 15:31:29,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:29,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:29,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 292 [2022-11-25 15:31:29,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:30,242 INFO L130 PetriNetUnfolder]: 2498/4435 cut-off events. [2022-11-25 15:31:30,242 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-25 15:31:30,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8373 conditions, 4435 events. 2498/4435 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 29299 event pairs, 1044 based on Foata normal form. 1036/5019 useless extension candidates. Maximal degree in co-relation 1255. Up to 3862 conditions per place. [2022-11-25 15:31:30,262 INFO L137 encePairwiseOnDemand]: 268/292 looper letters, 39 selfloop transitions, 2 changer transitions 9/69 dead transitions. [2022-11-25 15:31:30,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 252 flow [2022-11-25 15:31:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:31:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:31:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2022-11-25 15:31:30,266 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5353881278538812 [2022-11-25 15:31:30,266 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2022-11-25 15:31:30,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2022-11-25 15:31:30,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:30,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2022-11-25 15:31:30,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:30,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:30,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:30,273 INFO L175 Difference]: Start difference. First operand has 60 places, 80 transitions, 178 flow. Second operand 3 states and 469 transitions. [2022-11-25 15:31:30,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 252 flow [2022-11-25 15:31:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:31:30,276 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 124 flow [2022-11-25 15:31:30,276 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2022-11-25 15:31:30,277 INFO L288 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2022-11-25 15:31:30,277 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 124 flow [2022-11-25 15:31:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:30,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:30,278 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 15:31:30,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 15:31:30,279 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1155345880, now seen corresponding path program 1 times [2022-11-25 15:31:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654782477] [2022-11-25 15:31:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:30,299 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:31:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:30,323 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:31:30,336 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:31:30,337 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:31:30,337 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:31:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 15:31:30,338 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:31:30,338 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:31:30,339 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 15:31:30,360 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 15:31:30,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,436 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-11-25 15:31:30,437 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 15:31:30,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1692 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-11-25 15:31:30,443 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,447 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:30,447 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,448 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 196 transitions, 422 flow [2022-11-25 15:31:30,511 INFO L130 PetriNetUnfolder]: 77/453 cut-off events. [2022-11-25 15:31:30,512 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 15:31:30,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 453 events. 77/453 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1692 event pairs, 1 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 312. Up to 16 conditions per place. [2022-11-25 15:31:30,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 18972 [2022-11-25 15:31:34,867 INFO L134 LiptonReduction]: Checked pairs total: 58191 [2022-11-25 15:31:34,867 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-25 15:31:34,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:34,871 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;@63509068, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:34,872 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:34,874 INFO L130 PetriNetUnfolder]: 6/22 cut-off events. [2022-11-25 15:31:34,875 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:34,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:34,875 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:31:34,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1150403154, now seen corresponding path program 1 times [2022-11-25 15:31:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:34,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491962809] [2022-11-25 15:31:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:34,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:34,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491962809] [2022-11-25 15:31:34,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491962809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:34,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:34,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:34,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529376418] [2022-11-25 15:31:34,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:34,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:34,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:34,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:34,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 347 [2022-11-25 15:31:34,934 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 103 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:34,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:34,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 347 [2022-11-25 15:31:34,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:31:41,601 INFO L130 PetriNetUnfolder]: 35884/53615 cut-off events. [2022-11-25 15:31:41,601 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2022-11-25 15:31:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103237 conditions, 53615 events. 35884/53615 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 1433. Compared 404147 event pairs, 26647 based on Foata normal form. 9639/58243 useless extension candidates. Maximal degree in co-relation 13204. Up to 48834 conditions per place. [2022-11-25 15:31:42,000 INFO L137 encePairwiseOnDemand]: 317/347 looper letters, 51 selfloop transitions, 2 changer transitions 10/88 dead transitions. [2022-11-25 15:31:42,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 328 flow [2022-11-25 15:31:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:31:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:31:42,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 563 transitions. [2022-11-25 15:31:42,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5408261287223823 [2022-11-25 15:31:42,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 563 transitions. [2022-11-25 15:31:42,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 563 transitions. [2022-11-25 15:31:42,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:31:42,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 563 transitions. [2022-11-25 15:31:42,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:42,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:42,014 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 347.0) internal successors, (1388), 4 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:42,014 INFO L175 Difference]: Start difference. First operand has 77 places, 103 transitions, 236 flow. Second operand 3 states and 563 transitions. [2022-11-25 15:31:42,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 328 flow [2022-11-25 15:31:42,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 15:31:42,024 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 165 flow [2022-11-25 15:31:42,025 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=347, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2022-11-25 15:31:42,028 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2022-11-25 15:31:42,028 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 165 flow [2022-11-25 15:31:42,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:42,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:42,029 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-25 15:31:42,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 15:31:42,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -348473304, now seen corresponding path program 1 times [2022-11-25 15:31:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:42,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803082864] [2022-11-25 15:31:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:42,088 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 15:31:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 15:31:42,125 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 15:31:42,133 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 15:31:42,134 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-25 15:31:42,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-25 15:31:42,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 15:31:42,135 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-25 15:31:42,136 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 15:31:42,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-25 15:31:42,168 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 15:31:42,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,324 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-11-25 15:31:42,335 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 15:31:42,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2766 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-11-25 15:31:42,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,377 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:31:42,383 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,383 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 229 transitions, 502 flow [2022-11-25 15:31:42,641 INFO L130 PetriNetUnfolder]: 115/670 cut-off events. [2022-11-25 15:31:42,641 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-25 15:31:42,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 670 events. 115/670 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2766 event pairs, 6 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 473. Up to 32 conditions per place. [2022-11-25 15:31:42,669 INFO L119 LiptonReduction]: Number of co-enabled transitions 29512 [2022-11-25 15:31:47,849 INFO L134 LiptonReduction]: Checked pairs total: 106082 [2022-11-25 15:31:47,850 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-11-25 15:31:47,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:31:47,852 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;@63509068, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:31:47,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 15:31:47,855 INFO L130 PetriNetUnfolder]: 6/22 cut-off events. [2022-11-25 15:31:47,855 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:31:47,856 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:31:47,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 15:31:47,856 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:31:47,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:31:47,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1567132964, now seen corresponding path program 1 times [2022-11-25 15:31:47,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:31:47,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496579323] [2022-11-25 15:31:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:31:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:31:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:31:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:31:47,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:31:47,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496579323] [2022-11-25 15:31:47,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496579323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:31:47,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:31:47,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:31:47,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689330333] [2022-11-25 15:31:47,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:31:47,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:31:47,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:31:47,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:31:47,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:31:47,921 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 403 [2022-11-25 15:31:47,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 126 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:31:47,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:31:47,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 403 [2022-11-25 15:31:47,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand