./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8 --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 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 --- 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-e04fb08 [2022-11-16 12:15:05,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:15:05,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:15:05,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:15:05,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:15:05,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:15:05,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:15:05,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:15:05,458 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:15:05,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:15:05,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:15:05,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:15:05,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:15:05,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:15:05,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:15:05,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:15:05,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:15:05,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:15:05,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:15:05,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:15:05,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:15:05,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:15:05,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:15:05,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:15:05,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:15:05,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:15:05,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:15:05,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:15:05,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:15:05,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:15:05,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:15:05,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:15:05,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:15:05,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:15:05,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:15:05,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:15:05,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:15:05,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:15:05,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:15:05,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:15:05,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:15:05,517 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:15:05,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:15:05,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:15:05,558 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:15:05,558 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:15:05,559 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:15:05,559 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:15:05,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:15:05,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:15:05,561 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:15:05,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:15:05,562 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:15:05,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:15:05,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:15:05,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:15:05,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:15:05,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:15:05,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:15:05,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:15:05,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:15:05,565 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:15:05,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:15:05,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:15:05,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:15:05,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:15:05,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:15:05,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:15:05,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:15:05,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:15:05,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:15:05,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:15:05,568 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:15:05,568 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:15:05,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:15:05,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 134e9604c8f91a200c8250c9fbb45867ed525dc78e65c16e0a5fa44f5d71ac67 [2022-11-16 12:15:05,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:15:05,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:15:05,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:15:05,950 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:15:05,951 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:15:05,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-16 12:15:06,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/data/e73a1bf91/545269377a0e40c187c52ccd751c1b6c/FLAG370741fc9 [2022-11-16 12:15:06,554 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:15:06,555 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i [2022-11-16 12:15:06,568 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/data/e73a1bf91/545269377a0e40c187c52ccd751c1b6c/FLAG370741fc9 [2022-11-16 12:15:06,872 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/data/e73a1bf91/545269377a0e40c187c52ccd751c1b6c [2022-11-16 12:15:06,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:15:06,878 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:15:06,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:15:06,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:15:06,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:15:06,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:15:06" (1/1) ... [2022-11-16 12:15:06,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237f229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:06, skipping insertion in model container [2022-11-16 12:15:06,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:15:06" (1/1) ... [2022-11-16 12:15:06,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:15:06,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:15:07,216 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-16 12:15:07,343 WARN L229 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_ce621142-569c-4332-971c-2d2f2bf503c5/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-16 12:15:07,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:15:07,369 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:15:07,398 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-16 12:15:07,429 WARN L229 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_ce621142-569c-4332-971c-2d2f2bf503c5/sv-benchmarks/c/pthread-ext/46_monabsex2_vs.i[30494,30507] [2022-11-16 12:15:07,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:15:07,480 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:15:07,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07 WrapperNode [2022-11-16 12:15:07,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:15:07,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:15:07,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:15:07,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:15:07,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,542 INFO L138 Inliner]: procedures = 170, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-11-16 12:15:07,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:15:07,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:15:07,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:15:07,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:15:07,552 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,578 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:15:07,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:15:07,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:15:07,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:15:07,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (1/1) ... [2022-11-16 12:15:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:15:07,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:07,616 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:15:07,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce621142-569c-4332-971c-2d2f2bf503c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:15:07,656 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-16 12:15:07,657 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-16 12:15:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:15:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:15:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:15:07,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:15:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:15:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:15:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:15:07,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:15:07,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:15:07,660 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:15:07,775 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:15:07,778 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:15:07,887 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:15:07,908 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:15:07,908 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 12:15:07,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:15:07 BoogieIcfgContainer [2022-11-16 12:15:07,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:15:07,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:15:07,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:15:07,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:15:07,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:15:06" (1/3) ... [2022-11-16 12:15:07,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e48770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:15:07, skipping insertion in model container [2022-11-16 12:15:07,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:15:07" (2/3) ... [2022-11-16 12:15:07,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e48770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:15:07, skipping insertion in model container [2022-11-16 12:15:07,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:15:07" (3/3) ... [2022-11-16 12:15:07,920 INFO L112 eAbstractionObserver]: Analyzing ICFG 46_monabsex2_vs.i [2022-11-16 12:15:07,928 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:15:07,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:15:07,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:15:07,941 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:15:08,000 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:08,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 79 flow [2022-11-16 12:15:08,086 INFO L130 PetriNetUnfolder]: 2/48 cut-off events. [2022-11-16 12:15:08,086 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:08,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 48 events. 2/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-11-16 12:15:08,091 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 79 flow [2022-11-16 12:15:08,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 37 transitions, 79 flow [2022-11-16 12:15:08,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:08,112 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:08,112 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:15:08,126 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-16 12:15:08,127 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:08,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:08,128 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:08,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1096869042, now seen corresponding path program 1 times [2022-11-16 12:15:08,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:08,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347497389] [2022-11-16 12:15:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:08,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:08,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347497389] [2022-11-16 12:15:08,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347497389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:08,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:08,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781281577] [2022-11-16 12:15:08,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:08,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:08,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:08,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 37 [2022-11-16 12:15:08,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:08,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:08,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 37 [2022-11-16 12:15:08,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:08,678 INFO L130 PetriNetUnfolder]: 0/33 cut-off events. [2022-11-16 12:15:08,679 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:15:08,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 33 events. 0/33 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 3/36 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2022-11-16 12:15:08,680 INFO L137 encePairwiseOnDemand]: 32/37 looper letters, 2 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2022-11-16 12:15:08,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 71 flow [2022-11-16 12:15:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2022-11-16 12:15:08,710 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8918918918918919 [2022-11-16 12:15:08,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 99 transitions. [2022-11-16 12:15:08,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 99 transitions. [2022-11-16 12:15:08,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:08,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 99 transitions. [2022-11-16 12:15:08,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:08,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2022-11-16 12:15:08,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 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) [2022-11-16 12:15:08,722 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 79 flow. Second operand 3 states and 99 transitions. [2022-11-16 12:15:08,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 71 flow [2022-11-16 12:15:08,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 29 transitions, 71 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:08,727 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 67 flow [2022-11-16 12:15:08,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2022-11-16 12:15:08,733 INFO L288 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2022-11-16 12:15:08,733 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 67 flow [2022-11-16 12:15:08,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:08,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:08,734 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:08,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:15:08,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:15:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash 750747050, now seen corresponding path program 1 times [2022-11-16 12:15:08,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:08,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262144977] [2022-11-16 12:15:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:08,759 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:08,790 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:08,791 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:08,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-16 12:15:08,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-16 12:15:08,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-16 12:15:08,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:15:08,796 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-16 12:15:08,799 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:08,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:15:08,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:08,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 45 transitions, 102 flow [2022-11-16 12:15:08,839 INFO L130 PetriNetUnfolder]: 3/69 cut-off events. [2022-11-16 12:15:08,839 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:15:08,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 69 events. 3/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 49. Up to 6 conditions per place. [2022-11-16 12:15:08,840 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 45 transitions, 102 flow [2022-11-16 12:15:08,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 45 transitions, 102 flow [2022-11-16 12:15:08,849 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:08,850 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:08,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-16 12:15:08,860 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-16 12:15:08,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:08,860 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:08,860 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:08,861 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-16 12:15:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 816539065, now seen corresponding path program 1 times [2022-11-16 12:15:08,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:08,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661561809] [2022-11-16 12:15:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:08,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:08,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:08,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661561809] [2022-11-16 12:15:08,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661561809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:08,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283642944] [2022-11-16 12:15:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:08,985 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 45 [2022-11-16 12:15:08,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2022-11-16 12:15:08,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:08,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 45 [2022-11-16 12:15:08,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:09,033 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-16 12:15:09,034 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-16 12:15:09,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 75 events. 6/75 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 2 based on Foata normal form. 13/85 useless extension candidates. Maximal degree in co-relation 37. Up to 13 conditions per place. [2022-11-16 12:15:09,035 INFO L137 encePairwiseOnDemand]: 38/45 looper letters, 11 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2022-11-16 12:15:09,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 131 flow [2022-11-16 12:15:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2022-11-16 12:15:09,038 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9037037037037037 [2022-11-16 12:15:09,038 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 122 transitions. [2022-11-16 12:15:09,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 122 transitions. [2022-11-16 12:15:09,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:09,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 122 transitions. [2022-11-16 12:15:09,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,042 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 102 flow. Second operand 3 states and 122 transitions. [2022-11-16 12:15:09,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 131 flow [2022-11-16 12:15:09,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 129 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:09,045 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 107 flow [2022-11-16 12:15:09,045 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-16 12:15:09,046 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-16 12:15:09,047 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 107 flow [2022-11-16 12:15:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 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) [2022-11-16 12:15:09,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,047 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:15:09,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-16 12:15:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash -217358121, now seen corresponding path program 1 times [2022-11-16 12:15:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923498616] [2022-11-16 12:15:09,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:09,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923498616] [2022-11-16 12:15:09,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923498616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:09,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969864025] [2022-11-16 12:15:09,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:09,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:09,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:09,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:09,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 45 [2022-11-16 12:15:09,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:09,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 45 [2022-11-16 12:15:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:09,223 INFO L130 PetriNetUnfolder]: 7/74 cut-off events. [2022-11-16 12:15:09,225 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-16 12:15:09,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 74 events. 7/74 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 2 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 72. Up to 10 conditions per place. [2022-11-16 12:15:09,226 INFO L137 encePairwiseOnDemand]: 41/45 looper letters, 10 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2022-11-16 12:15:09,226 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 138 flow [2022-11-16 12:15:09,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:09,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:09,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2022-11-16 12:15:09,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8592592592592593 [2022-11-16 12:15:09,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 116 transitions. [2022-11-16 12:15:09,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 116 transitions. [2022-11-16 12:15:09,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:09,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 116 transitions. [2022-11-16 12:15:09,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 45.0) internal successors, (180), 4 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,231 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 107 flow. Second operand 3 states and 116 transitions. [2022-11-16 12:15:09,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 138 flow [2022-11-16 12:15:09,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:09,235 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 110 flow [2022-11-16 12:15:09,239 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2022-11-16 12:15:09,240 INFO L288 CegarLoopForPetriNet]: 49 programPoint places, -3 predicate places. [2022-11-16 12:15:09,242 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 110 flow [2022-11-16 12:15:09,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,243 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,243 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:15:09,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-16 12:15:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1984575946, now seen corresponding path program 1 times [2022-11-16 12:15:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326961865] [2022-11-16 12:15:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:09,290 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:09,321 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:09,321 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:09,322 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-16 12:15:09,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-16 12:15:09,322 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-16 12:15:09,323 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-16 12:15:09,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:15:09,323 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:09,324 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:09,324 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:15:09,344 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:09,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 53 transitions, 127 flow [2022-11-16 12:15:09,362 INFO L130 PetriNetUnfolder]: 4/90 cut-off events. [2022-11-16 12:15:09,362 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-16 12:15:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 90 events. 4/90 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 122 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 73. Up to 8 conditions per place. [2022-11-16 12:15:09,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 53 transitions, 127 flow [2022-11-16 12:15:09,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 53 transitions, 127 flow [2022-11-16 12:15:09,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:09,367 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:09,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 12:15:09,373 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-16 12:15:09,373 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:09,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,374 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-16 12:15:09,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1995165472, now seen corresponding path program 1 times [2022-11-16 12:15:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271784259] [2022-11-16 12:15:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:09,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:09,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271784259] [2022-11-16 12:15:09,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271784259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:09,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:09,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368595691] [2022-11-16 12:15:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:09,466 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2022-11-16 12:15:09,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:09,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2022-11-16 12:15:09,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:09,579 INFO L130 PetriNetUnfolder]: 59/242 cut-off events. [2022-11-16 12:15:09,590 INFO L131 PetriNetUnfolder]: For 91/91 co-relation queries the response was YES. [2022-11-16 12:15:09,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 242 events. 59/242 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1136 event pairs, 23 based on Foata normal form. 56/270 useless extension candidates. Maximal degree in co-relation 108. Up to 95 conditions per place. [2022-11-16 12:15:09,594 INFO L137 encePairwiseOnDemand]: 44/53 looper letters, 17 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2022-11-16 12:15:09,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 183 flow [2022-11-16 12:15:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2022-11-16 12:15:09,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8930817610062893 [2022-11-16 12:15:09,598 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 142 transitions. [2022-11-16 12:15:09,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 142 transitions. [2022-11-16 12:15:09,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:09,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 142 transitions. [2022-11-16 12:15:09,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,601 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 127 flow. Second operand 3 states and 142 transitions. [2022-11-16 12:15:09,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 183 flow [2022-11-16 12:15:09,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 54 transitions, 175 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:09,604 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 137 flow [2022-11-16 12:15:09,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-11-16 12:15:09,605 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -3 predicate places. [2022-11-16 12:15:09,605 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 137 flow [2022-11-16 12:15:09,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,606 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:15:09,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-16 12:15:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1152270226, now seen corresponding path program 1 times [2022-11-16 12:15:09,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254635988] [2022-11-16 12:15:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:15:09,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:09,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254635988] [2022-11-16 12:15:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254635988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:09,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:09,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:09,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120912567] [2022-11-16 12:15:09,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:09,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:09,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 53 [2022-11-16 12:15:09,726 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:09,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 53 [2022-11-16 12:15:09,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:09,818 INFO L130 PetriNetUnfolder]: 53/239 cut-off events. [2022-11-16 12:15:09,818 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-16 12:15:09,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 239 events. 53/239 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1043 event pairs, 17 based on Foata normal form. 23/254 useless extension candidates. Maximal degree in co-relation 266. Up to 57 conditions per place. [2022-11-16 12:15:09,821 INFO L137 encePairwiseOnDemand]: 47/53 looper letters, 15 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2022-11-16 12:15:09,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 187 flow [2022-11-16 12:15:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:09,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:09,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2022-11-16 12:15:09,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8490566037735849 [2022-11-16 12:15:09,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 135 transitions. [2022-11-16 12:15:09,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 135 transitions. [2022-11-16 12:15:09,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:09,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 135 transitions. [2022-11-16 12:15:09,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,825 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 137 flow. Second operand 3 states and 135 transitions. [2022-11-16 12:15:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 187 flow [2022-11-16 12:15:09,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:09,828 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 142 flow [2022-11-16 12:15:09,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2022-11-16 12:15:09,829 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-11-16 12:15:09,829 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 142 flow [2022-11-16 12:15:09,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,829 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,829 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:15:09,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-16 12:15:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 620408523, now seen corresponding path program 1 times [2022-11-16 12:15:09,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448583037] [2022-11-16 12:15:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:09,847 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:09,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:09,862 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:09,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-16 12:15:09,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-16 12:15:09,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-16 12:15:09,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-16 12:15:09,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-16 12:15:09,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:15:09,864 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:09,865 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:09,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:15:09,885 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:09,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 61 transitions, 154 flow [2022-11-16 12:15:09,900 INFO L130 PetriNetUnfolder]: 5/111 cut-off events. [2022-11-16 12:15:09,900 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:15:09,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 111 events. 5/111 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 154 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 98. Up to 10 conditions per place. [2022-11-16 12:15:09,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 69 places, 61 transitions, 154 flow [2022-11-16 12:15:09,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 61 transitions, 154 flow [2022-11-16 12:15:09,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:09,904 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:09,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-16 12:15:09,907 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-16 12:15:09,907 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:09,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:09,907 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:09,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-16 12:15:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1251690471, now seen corresponding path program 1 times [2022-11-16 12:15:09,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825045646] [2022-11-16 12:15:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:09,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:09,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:09,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825045646] [2022-11-16 12:15:09,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825045646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:09,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:09,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:09,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924633370] [2022-11-16 12:15:09,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:09,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:09,992 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 61 [2022-11-16 12:15:09,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:09,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:09,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 61 [2022-11-16 12:15:09,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:10,281 INFO L130 PetriNetUnfolder]: 421/1000 cut-off events. [2022-11-16 12:15:10,281 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-11-16 12:15:10,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1990 conditions, 1000 events. 421/1000 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6324 event pairs, 231 based on Foata normal form. 251/1048 useless extension candidates. Maximal degree in co-relation 596. Up to 608 conditions per place. [2022-11-16 12:15:10,301 INFO L137 encePairwiseOnDemand]: 50/61 looper letters, 23 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2022-11-16 12:15:10,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 239 flow [2022-11-16 12:15:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2022-11-16 12:15:10,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8852459016393442 [2022-11-16 12:15:10,306 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2022-11-16 12:15:10,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2022-11-16 12:15:10,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:10,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2022-11-16 12:15:10,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,312 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 154 flow. Second operand 3 states and 162 transitions. [2022-11-16 12:15:10,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 239 flow [2022-11-16 12:15:10,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 221 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:10,318 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 167 flow [2022-11-16 12:15:10,319 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2022-11-16 12:15:10,321 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2022-11-16 12:15:10,321 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 167 flow [2022-11-16 12:15:10,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:10,322 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:10,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:15:10,323 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-16 12:15:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:10,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1254058345, now seen corresponding path program 1 times [2022-11-16 12:15:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891037166] [2022-11-16 12:15:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:10,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:10,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:10,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891037166] [2022-11-16 12:15:10,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891037166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:10,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:10,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126829591] [2022-11-16 12:15:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:10,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:10,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:10,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:10,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 61 [2022-11-16 12:15:10,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:10,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 61 [2022-11-16 12:15:10,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:10,672 INFO L130 PetriNetUnfolder]: 283/916 cut-off events. [2022-11-16 12:15:10,672 INFO L131 PetriNetUnfolder]: For 290/290 co-relation queries the response was YES. [2022-11-16 12:15:10,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1694 conditions, 916 events. 283/916 cut-off events. For 290/290 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6404 event pairs, 59 based on Foata normal form. 163/1046 useless extension candidates. Maximal degree in co-relation 1631. Up to 260 conditions per place. [2022-11-16 12:15:10,682 INFO L137 encePairwiseOnDemand]: 53/61 looper letters, 20 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2022-11-16 12:15:10,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 236 flow [2022-11-16 12:15:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2022-11-16 12:15:10,684 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8415300546448088 [2022-11-16 12:15:10,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2022-11-16 12:15:10,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2022-11-16 12:15:10,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:10,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2022-11-16 12:15:10,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 61.0) internal successors, (244), 4 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,695 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 167 flow. Second operand 3 states and 154 transitions. [2022-11-16 12:15:10,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 236 flow [2022-11-16 12:15:10,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 231 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:10,704 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 174 flow [2022-11-16 12:15:10,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2022-11-16 12:15:10,706 INFO L288 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2022-11-16 12:15:10,713 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 174 flow [2022-11-16 12:15:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:10,714 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:15:10,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-16 12:15:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:10,716 INFO L85 PathProgramCache]: Analyzing trace with hash 744623267, now seen corresponding path program 1 times [2022-11-16 12:15:10,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:10,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729952350] [2022-11-16 12:15:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:10,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:10,746 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:10,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:10,776 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:10,777 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-16 12:15:10,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-16 12:15:10,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-16 12:15:10,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-16 12:15:10,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-16 12:15:10,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-16 12:15:10,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:15:10,779 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:10,780 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:10,780 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:15:10,817 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:10,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 69 transitions, 183 flow [2022-11-16 12:15:10,841 INFO L130 PetriNetUnfolder]: 6/132 cut-off events. [2022-11-16 12:15:10,841 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-16 12:15:10,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 132 events. 6/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 192 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 124. Up to 12 conditions per place. [2022-11-16 12:15:10,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 69 transitions, 183 flow [2022-11-16 12:15:10,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 69 transitions, 183 flow [2022-11-16 12:15:10,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:10,848 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:10,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-16 12:15:10,851 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-16 12:15:10,851 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:10,851 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:10,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:10,851 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-16 12:15:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1967171630, now seen corresponding path program 1 times [2022-11-16 12:15:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479094022] [2022-11-16 12:15:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:10,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:10,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:10,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479094022] [2022-11-16 12:15:10,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479094022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:10,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:10,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:10,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494456078] [2022-11-16 12:15:10,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:10,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:10,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:10,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:10,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:10,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 69 [2022-11-16 12:15:10,930 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:10,931 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:10,931 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 69 [2022-11-16 12:15:10,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:11,710 INFO L130 PetriNetUnfolder]: 2584/4717 cut-off events. [2022-11-16 12:15:11,710 INFO L131 PetriNetUnfolder]: For 3401/3401 co-relation queries the response was YES. [2022-11-16 12:15:11,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9803 conditions, 4717 events. 2584/4717 cut-off events. For 3401/3401 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 33298 event pairs, 864 based on Foata normal form. 1064/4709 useless extension candidates. Maximal degree in co-relation 6342. Up to 3488 conditions per place. [2022-11-16 12:15:11,772 INFO L137 encePairwiseOnDemand]: 56/69 looper letters, 29 selfloop transitions, 6 changer transitions 0/76 dead transitions. [2022-11-16 12:15:11,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 299 flow [2022-11-16 12:15:11,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2022-11-16 12:15:11,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8792270531400966 [2022-11-16 12:15:11,776 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2022-11-16 12:15:11,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2022-11-16 12:15:11,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:11,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2022-11-16 12:15:11,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,778 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,778 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 183 flow. Second operand 3 states and 182 transitions. [2022-11-16 12:15:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 299 flow [2022-11-16 12:15:11,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 267 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:11,782 INFO L231 Difference]: Finished difference. Result has 76 places, 67 transitions, 197 flow [2022-11-16 12:15:11,782 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=76, PETRI_TRANSITIONS=67} [2022-11-16 12:15:11,783 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2022-11-16 12:15:11,783 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 67 transitions, 197 flow [2022-11-16 12:15:11,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:11,784 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:11,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:15:11,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-16 12:15:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash 454492430, now seen corresponding path program 1 times [2022-11-16 12:15:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:11,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736797349] [2022-11-16 12:15:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:11,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:15:11,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736797349] [2022-11-16 12:15:11,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736797349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:11,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:11,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742290500] [2022-11-16 12:15:11,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:11,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:11,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:11,833 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 69 [2022-11-16 12:15:11,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:11,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:11,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 69 [2022-11-16 12:15:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:12,472 INFO L130 PetriNetUnfolder]: 1323/3694 cut-off events. [2022-11-16 12:15:12,472 INFO L131 PetriNetUnfolder]: For 1408/1408 co-relation queries the response was YES. [2022-11-16 12:15:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6706 conditions, 3694 events. 1323/3694 cut-off events. For 1408/1408 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 33726 event pairs, 293 based on Foata normal form. 928/4487 useless extension candidates. Maximal degree in co-relation 6642. Up to 1123 conditions per place. [2022-11-16 12:15:12,512 INFO L137 encePairwiseOnDemand]: 59/69 looper letters, 25 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2022-11-16 12:15:12,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 285 flow [2022-11-16 12:15:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2022-11-16 12:15:12,514 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8357487922705314 [2022-11-16 12:15:12,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2022-11-16 12:15:12,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2022-11-16 12:15:12,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:12,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2022-11-16 12:15:12,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,516 INFO L175 Difference]: Start difference. First operand has 76 places, 67 transitions, 197 flow. Second operand 3 states and 173 transitions. [2022-11-16 12:15:12,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 285 flow [2022-11-16 12:15:12,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:12,522 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 206 flow [2022-11-16 12:15:12,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2022-11-16 12:15:12,523 INFO L288 CegarLoopForPetriNet]: 79 programPoint places, -6 predicate places. [2022-11-16 12:15:12,524 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 206 flow [2022-11-16 12:15:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:12,524 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:12,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:15:12,525 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-16 12:15:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash -576744180, now seen corresponding path program 1 times [2022-11-16 12:15:12,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:12,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838939231] [2022-11-16 12:15:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:12,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:12,553 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:12,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:12,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:12,582 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:12,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-16 12:15:12,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-16 12:15:12,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-11-16 12:15:12,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-16 12:15:12,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-16 12:15:12,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-16 12:15:12,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-16 12:15:12,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:15:12,584 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:12,585 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:12,585 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-11-16 12:15:12,628 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:12,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 89 places, 77 transitions, 214 flow [2022-11-16 12:15:12,652 INFO L130 PetriNetUnfolder]: 7/153 cut-off events. [2022-11-16 12:15:12,652 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-16 12:15:12,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 153 events. 7/153 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 222 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 151. Up to 14 conditions per place. [2022-11-16 12:15:12,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 89 places, 77 transitions, 214 flow [2022-11-16 12:15:12,655 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 89 places, 77 transitions, 214 flow [2022-11-16 12:15:12,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:12,656 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:12,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 12:15:12,659 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-16 12:15:12,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:12,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:12,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:12,660 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-16 12:15:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:12,660 INFO L85 PathProgramCache]: Analyzing trace with hash 151278677, now seen corresponding path program 1 times [2022-11-16 12:15:12,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:12,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964028723] [2022-11-16 12:15:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:12,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964028723] [2022-11-16 12:15:12,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964028723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:12,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:12,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:12,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244156729] [2022-11-16 12:15:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:12,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:12,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-11-16 12:15:12,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 77 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:12,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:12,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-11-16 12:15:12,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:16,462 INFO L130 PetriNetUnfolder]: 14408/23143 cut-off events. [2022-11-16 12:15:16,462 INFO L131 PetriNetUnfolder]: For 21004/21004 co-relation queries the response was YES. [2022-11-16 12:15:16,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49387 conditions, 23143 events. 14408/23143 cut-off events. For 21004/21004 co-relation queries the response was YES. Maximal size of possible extension queue 1384. Compared 183784 event pairs, 9424 based on Foata normal form. 4464/21535 useless extension candidates. Maximal degree in co-relation 13922. Up to 18519 conditions per place. [2022-11-16 12:15:16,801 INFO L137 encePairwiseOnDemand]: 62/77 looper letters, 35 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2022-11-16 12:15:16,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 87 transitions, 363 flow [2022-11-16 12:15:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2022-11-16 12:15:16,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8744588744588745 [2022-11-16 12:15:16,803 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2022-11-16 12:15:16,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2022-11-16 12:15:16,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:16,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2022-11-16 12:15:16,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:16,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 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) [2022-11-16 12:15:16,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 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) [2022-11-16 12:15:16,805 INFO L175 Difference]: Start difference. First operand has 89 places, 77 transitions, 214 flow. Second operand 3 states and 202 transitions. [2022-11-16 12:15:16,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 87 transitions, 363 flow [2022-11-16 12:15:16,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 87 transitions, 313 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:16,811 INFO L231 Difference]: Finished difference. Result has 86 places, 76 transitions, 227 flow [2022-11-16 12:15:16,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=86, PETRI_TRANSITIONS=76} [2022-11-16 12:15:16,813 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-11-16 12:15:16,814 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 76 transitions, 227 flow [2022-11-16 12:15:16,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:16,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:16,814 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:16,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:15:16,815 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-16 12:15:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1190406981, now seen corresponding path program 1 times [2022-11-16 12:15:16,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:16,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270687149] [2022-11-16 12:15:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:16,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270687149] [2022-11-16 12:15:17,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270687149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:17,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:17,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778664910] [2022-11-16 12:15:17,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:17,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 77 [2022-11-16 12:15:17,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 76 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 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) [2022-11-16 12:15:17,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:17,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 77 [2022-11-16 12:15:17,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:18,705 INFO L130 PetriNetUnfolder]: 5635/13690 cut-off events. [2022-11-16 12:15:18,705 INFO L131 PetriNetUnfolder]: For 6823/6852 co-relation queries the response was YES. [2022-11-16 12:15:18,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24317 conditions, 13690 events. 5635/13690 cut-off events. For 6823/6852 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 144070 event pairs, 2538 based on Foata normal form. 4368/17135 useless extension candidates. Maximal degree in co-relation 13752. Up to 4511 conditions per place. [2022-11-16 12:15:18,841 INFO L137 encePairwiseOnDemand]: 65/77 looper letters, 30 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2022-11-16 12:15:18,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 334 flow [2022-11-16 12:15:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2022-11-16 12:15:18,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8311688311688312 [2022-11-16 12:15:18,843 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2022-11-16 12:15:18,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2022-11-16 12:15:18,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:18,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2022-11-16 12:15:18,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:18,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 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) [2022-11-16 12:15:18,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 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) [2022-11-16 12:15:18,846 INFO L175 Difference]: Start difference. First operand has 86 places, 76 transitions, 227 flow. Second operand 3 states and 192 transitions. [2022-11-16 12:15:18,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 334 flow [2022-11-16 12:15:18,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:18,848 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 238 flow [2022-11-16 12:15:18,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2022-11-16 12:15:18,849 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2022-11-16 12:15:18,849 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 238 flow [2022-11-16 12:15:18,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 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) [2022-11-16 12:15:18,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:18,850 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:18,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:15:18,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-11-16 12:15:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:18,851 INFO L85 PathProgramCache]: Analyzing trace with hash 907606544, now seen corresponding path program 1 times [2022-11-16 12:15:18,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:18,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130518079] [2022-11-16 12:15:18,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:18,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:18,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:18,912 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:18,915 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:18,915 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-16 12:15:18,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-11-16 12:15:18,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-11-16 12:15:18,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-11-16 12:15:18,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-11-16 12:15:18,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-11-16 12:15:18,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-11-16 12:15:18,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-11-16 12:15:18,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:15:18,917 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:18,920 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:18,920 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-11-16 12:15:18,954 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:18,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 85 transitions, 247 flow [2022-11-16 12:15:18,971 INFO L130 PetriNetUnfolder]: 8/174 cut-off events. [2022-11-16 12:15:18,972 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-16 12:15:18,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 174 events. 8/174 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 270 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 180. Up to 16 conditions per place. [2022-11-16 12:15:18,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 85 transitions, 247 flow [2022-11-16 12:15:18,975 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 85 transitions, 247 flow [2022-11-16 12:15:18,976 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:18,977 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:18,977 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-16 12:15:18,979 INFO L130 PetriNetUnfolder]: 2/31 cut-off events. [2022-11-16 12:15:18,979 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:18,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:18,980 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:18,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-16 12:15:18,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 98979356, now seen corresponding path program 1 times [2022-11-16 12:15:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989463175] [2022-11-16 12:15:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989463175] [2022-11-16 12:15:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989463175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:19,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:19,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:19,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674286793] [2022-11-16 12:15:19,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:19,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:19,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 85 [2022-11-16 12:15:19,043 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 85 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:19,043 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:19,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 85 [2022-11-16 12:15:19,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:31,202 INFO L130 PetriNetUnfolder]: 75117/111330 cut-off events. [2022-11-16 12:15:31,202 INFO L131 PetriNetUnfolder]: For 116553/116553 co-relation queries the response was YES. [2022-11-16 12:15:31,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239848 conditions, 111330 events. 75117/111330 cut-off events. For 116553/116553 co-relation queries the response was YES. Maximal size of possible extension queue 5092. Compared 899625 event pairs, 29991 based on Foata normal form. 18820/100778 useless extension candidates. Maximal degree in co-relation 156380. Up to 93041 conditions per place. [2022-11-16 12:15:33,101 INFO L137 encePairwiseOnDemand]: 68/85 looper letters, 41 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2022-11-16 12:15:33,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 431 flow [2022-11-16 12:15:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:33,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2022-11-16 12:15:33,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8705882352941177 [2022-11-16 12:15:33,104 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2022-11-16 12:15:33,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2022-11-16 12:15:33,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:33,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2022-11-16 12:15:33,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:33,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:33,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:33,106 INFO L175 Difference]: Start difference. First operand has 99 places, 85 transitions, 247 flow. Second operand 3 states and 222 transitions. [2022-11-16 12:15:33,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 431 flow [2022-11-16 12:15:33,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 98 transitions, 359 flow, removed 36 selfloop flow, removed 0 redundant places. [2022-11-16 12:15:33,255 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 257 flow [2022-11-16 12:15:33,255 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2022-11-16 12:15:33,256 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -3 predicate places. [2022-11-16 12:15:33,256 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 257 flow [2022-11-16 12:15:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:33,257 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:33,257 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:15:33,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-16 12:15:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash 314136048, now seen corresponding path program 1 times [2022-11-16 12:15:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:33,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147681202] [2022-11-16 12:15:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:15:33,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:33,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147681202] [2022-11-16 12:15:33,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147681202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:33,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:33,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:33,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31197458] [2022-11-16 12:15:33,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:33,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:33,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:33,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 85 [2022-11-16 12:15:33,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:33,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:33,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 85 [2022-11-16 12:15:33,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:15:39,583 INFO L130 PetriNetUnfolder]: 24837/60570 cut-off events. [2022-11-16 12:15:39,584 INFO L131 PetriNetUnfolder]: For 32579/32579 co-relation queries the response was YES. [2022-11-16 12:15:39,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105798 conditions, 60570 events. 24837/60570 cut-off events. For 32579/32579 co-relation queries the response was YES. Maximal size of possible extension queue 3523. Compared 789899 event pairs, 7506 based on Foata normal form. 22113/79785 useless extension candidates. Maximal degree in co-relation 105732. Up to 23603 conditions per place. [2022-11-16 12:15:40,219 INFO L137 encePairwiseOnDemand]: 71/85 looper letters, 35 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2022-11-16 12:15:40,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 98 transitions, 383 flow [2022-11-16 12:15:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:15:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2022-11-16 12:15:40,221 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8274509803921568 [2022-11-16 12:15:40,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2022-11-16 12:15:40,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2022-11-16 12:15:40,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:15:40,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2022-11-16 12:15:40,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:40,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:40,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:40,223 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 257 flow. Second operand 3 states and 211 transitions. [2022-11-16 12:15:40,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 98 transitions, 383 flow [2022-11-16 12:15:40,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 375 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:15:40,231 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 270 flow [2022-11-16 12:15:40,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2022-11-16 12:15:40,232 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -8 predicate places. [2022-11-16 12:15:40,232 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 270 flow [2022-11-16 12:15:40,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:40,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:40,233 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:40,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:15:40,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-11-16 12:15:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:40,234 INFO L85 PathProgramCache]: Analyzing trace with hash -82625427, now seen corresponding path program 1 times [2022-11-16 12:15:40,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:40,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929147787] [2022-11-16 12:15:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:40,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:40,270 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:15:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:15:40,300 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:15:40,304 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:15:40,305 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-16 12:15:40,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2022-11-16 12:15:40,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2022-11-16 12:15:40,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2022-11-16 12:15:40,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2022-11-16 12:15:40,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2022-11-16 12:15:40,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2022-11-16 12:15:40,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2022-11-16 12:15:40,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2022-11-16 12:15:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:15:40,307 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-16 12:15:40,308 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:15:40,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2022-11-16 12:15:40,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-16 12:15:40,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 93 transitions, 282 flow [2022-11-16 12:15:40,358 INFO L130 PetriNetUnfolder]: 9/195 cut-off events. [2022-11-16 12:15:40,359 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-11-16 12:15:40,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 195 events. 9/195 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 211. Up to 18 conditions per place. [2022-11-16 12:15:40,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 93 transitions, 282 flow [2022-11-16 12:15:40,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 93 transitions, 282 flow [2022-11-16 12:15:40,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:15:40,364 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;@7611baac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:15:40,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-16 12:15:40,367 INFO L130 PetriNetUnfolder]: 1/29 cut-off events. [2022-11-16 12:15:40,367 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:15:40,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:15:40,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:40,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-11-16 12:15:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1810271875, now seen corresponding path program 1 times [2022-11-16 12:15:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:40,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255800225] [2022-11-16 12:15:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:40,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:40,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:40,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255800225] [2022-11-16 12:15:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255800225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:40,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:40,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645942764] [2022-11-16 12:15:40,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:40,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 93 [2022-11-16 12:15:40,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:15:40,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:15:40,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 93 [2022-11-16 12:15:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand