./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-10.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 15:50:58,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 15:50:58,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 15:50:58,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 15:50:58,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 15:50:58,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 15:50:58,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 15:50:58,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 15:50:58,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 15:50:58,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 15:50:58,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 15:50:58,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 15:50:58,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 15:50:58,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 15:50:58,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 15:50:58,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 15:50:58,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 15:50:58,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 15:50:58,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 15:50:58,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 15:50:58,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 15:50:58,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 15:50:58,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 15:50:58,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 15:50:58,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 15:50:58,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 15:50:58,510 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 15:50:58,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 15:50:58,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 15:50:58,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 15:50:58,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 15:50:58,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 15:50:58,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 15:50:58,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 15:50:58,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 15:50:58,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 15:50:58,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 15:50:58,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 15:50:58,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 15:50:58,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 15:50:58,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 15:50:58,525 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 15:50:58,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 15:50:58,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 15:50:58,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 15:50:58,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 15:50:58,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 15:50:58,567 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 15:50:58,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 15:50:58,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 15:50:58,568 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 15:50:58,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 15:50:58,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 15:50:58,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 15:50:58,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 15:50:58,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 15:50:58,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 15:50:58,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 15:50:58,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 15:50:58,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 15:50:58,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 15:50:58,573 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 15:50:58,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 15:50:58,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 15:50:58,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 15:50:58,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 15:50:58,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:50:58,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 15:50:58,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 15:50:58,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 15:50:58,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 15:50:58,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 15:50:58,576 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 15:50:58,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 15:50:58,577 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 15:50:58,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 15:50:58,577 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 [2022-11-25 15:50:58,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 15:50:58,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 15:50:58,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 15:50:58,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 15:50:58,966 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 15:50:58,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/fib_safe-10.i [2022-11-25 15:51:01,947 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 15:51:02,230 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 15:51:02,231 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/sv-benchmarks/c/pthread/fib_safe-10.i [2022-11-25 15:51:02,246 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/data/8f87ec5b2/2ed4d942e2224be89ba2f39c3c9b6c3d/FLAGe2238fdce [2022-11-25 15:51:02,261 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/data/8f87ec5b2/2ed4d942e2224be89ba2f39c3c9b6c3d [2022-11-25 15:51:02,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 15:51:02,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 15:51:02,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 15:51:02,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 15:51:02,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 15:51:02,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:02,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@124626e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02, skipping insertion in model container [2022-11-25 15:51:02,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:02,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 15:51:02,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 15:51:02,793 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2022-11-25 15:51:02,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,803 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,817 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,818 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,819 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:51:02,830 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 15:51:02,864 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2022-11-25 15:51:02,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,892 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 15:51:02,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 15:51:02,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 15:51:02,934 INFO L208 MainTranslator]: Completed translation [2022-11-25 15:51:02,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02 WrapperNode [2022-11-25 15:51:02,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 15:51:02,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 15:51:02,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 15:51:02,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 15:51:02,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:02,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:02,995 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-25 15:51:02,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 15:51:02,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 15:51:02,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 15:51:02,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 15:51:03,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 15:51:03,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 15:51:03,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 15:51:03,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 15:51:03,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (1/1) ... [2022-11-25 15:51:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 15:51:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:03,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 15:51:03,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 15:51:03,120 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 15:51:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 15:51:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 15:51:03,121 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 15:51:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 15:51:03,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 15:51:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 15:51:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 15:51:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 15:51:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 15:51:03,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 15:51:03,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 15:51:03,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 15:51:03,124 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 15:51:03,274 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 15:51:03,276 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 15:51:03,497 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 15:51:03,504 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 15:51:03,505 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 15:51:03,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:51:03 BoogieIcfgContainer [2022-11-25 15:51:03,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 15:51:03,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 15:51:03,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 15:51:03,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 15:51:03,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 03:51:02" (1/3) ... [2022-11-25 15:51:03,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:51:03, skipping insertion in model container [2022-11-25 15:51:03,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 03:51:02" (2/3) ... [2022-11-25 15:51:03,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348b0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 03:51:03, skipping insertion in model container [2022-11-25 15:51:03,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 03:51:03" (3/3) ... [2022-11-25 15:51:03,518 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2022-11-25 15:51:03,528 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 15:51:03,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 15:51:03,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 15:51:03,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 15:51:03,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 15:51:03,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-11-25 15:51:03,786 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-25 15:51:03,787 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:51:03,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-25 15:51:03,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-11-25 15:51:03,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-11-25 15:51:03,804 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 15:51:03,819 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-25 15:51:03,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-11-25 15:51:03,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-11-25 15:51:03,856 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-11-25 15:51:03,856 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:51:03,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 99 events. 7/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2022-11-25 15:51:03,859 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-11-25 15:51:07,941 INFO L134 LiptonReduction]: Checked pairs total: 1553 [2022-11-25 15:51:07,944 INFO L136 LiptonReduction]: Total number of compositions: 98 [2022-11-25 15:51:07,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 15:51:07,971 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;@75faf58c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 15:51:07,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 15:51:07,976 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-11-25 15:51:07,976 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 15:51:07,976 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:07,977 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 15:51:07,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:51:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1613159743, now seen corresponding path program 1 times [2022-11-25 15:51:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:07,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126140115] [2022-11-25 15:51:07,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:07,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:08,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:08,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126140115] [2022-11-25 15:51:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126140115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 15:51:08,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 15:51:08,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 15:51:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389323468] [2022-11-25 15:51:08,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 15:51:08,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 15:51:08,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:08,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 15:51:08,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 15:51:08,377 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 199 [2022-11-25 15:51:08,379 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 14 transitions, 34 flow. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 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) [2022-11-25 15:51:08,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:08,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 199 [2022-11-25 15:51:08,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:51:08,477 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-11-25 15:51:08,477 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 15:51:08,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 149 events. 97/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 336 event pairs, 20 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 300. Up to 91 conditions per place. [2022-11-25 15:51:08,482 INFO L137 encePairwiseOnDemand]: 195/199 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-11-25 15:51:08,483 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-11-25 15:51:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 15:51:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 15:51:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-11-25 15:51:08,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.490787269681742 [2022-11-25 15:51:08,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-11-25 15:51:08,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-11-25 15:51:08,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:51:08,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-11-25 15:51:08,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:08,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:08,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:08,534 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-11-25 15:51:08,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-11-25 15:51:08,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 15:51:08,540 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-11-25 15:51:08,542 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2022-11-25 15:51:08,549 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-11-25 15:51:08,550 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-11-25 15:51:08,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 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) [2022-11-25 15:51:08,550 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:08,550 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:08,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 15:51:08,551 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:51:08,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:08,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1531655777, now seen corresponding path program 1 times [2022-11-25 15:51:08,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:08,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977350110] [2022-11-25 15:51:08,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:08,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:08,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:08,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:08,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977350110] [2022-11-25 15:51:08,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977350110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:51:08,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441289430] [2022-11-25 15:51:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:08,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:08,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:08,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 15:51:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 15:51:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:08,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:51:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:08,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441289430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:51:08,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:51:08,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 15:51:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099534432] [2022-11-25 15:51:08,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:51:08,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 15:51:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:08,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 15:51:08,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 15:51:08,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-25 15:51:08,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:08,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:08,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-25 15:51:08,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:51:09,067 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-11-25 15:51:09,074 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 15:51:09,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 203 events. 133/203 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 452 event pairs, 20 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 471. Up to 64 conditions per place. [2022-11-25 15:51:09,076 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-11-25 15:51:09,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-11-25 15:51:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 15:51:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 15:51:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-11-25 15:51:09,083 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48408710217755446 [2022-11-25 15:51:09,083 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-11-25 15:51:09,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-11-25 15:51:09,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:51:09,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-11-25 15:51:09,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.33333333333333) internal successors, (578), 6 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,093 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,093 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-11-25 15:51:09,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-11-25 15:51:09,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 15:51:09,095 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-11-25 15:51:09,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=76, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2022-11-25 15:51:09,096 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-11-25 15:51:09,096 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-11-25 15:51:09,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.71428571428571) internal successors, (635), 7 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:09,097 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:09,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 15:51:09,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 15:51:09,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:51:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash -175043903, now seen corresponding path program 2 times [2022-11-25 15:51:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777752535] [2022-11-25 15:51:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:09,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777752535] [2022-11-25 15:51:09,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777752535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:51:09,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631536151] [2022-11-25 15:51:09,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 15:51:09,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:09,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:09,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:09,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 15:51:09,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 15:51:09,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:51:09,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 15:51:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:09,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:51:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:09,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631536151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:51:09,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:51:09,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 15:51:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376573177] [2022-11-25 15:51:09,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:51:09,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 15:51:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 15:51:09,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 15:51:09,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-25 15:51:09,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 76 flow. Second operand has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:09,764 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-25 15:51:09,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:51:09,934 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-11-25 15:51:09,934 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-11-25 15:51:09,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 365 events. 241/365 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 847 event pairs, 20 based on Foata normal form. 54/339 useless extension candidates. Maximal degree in co-relation 993. Up to 109 conditions per place. [2022-11-25 15:51:09,939 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-11-25 15:51:09,939 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-11-25 15:51:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 15:51:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 15:51:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-11-25 15:51:09,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48450586264656614 [2022-11-25 15:51:09,943 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-11-25 15:51:09,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-11-25 15:51:09,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:51:09,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-11-25 15:51:09,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.41666666666667) internal successors, (1157), 12 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,955 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 199.0) internal successors, (2587), 13 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,957 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-11-25 15:51:09,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-11-25 15:51:09,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 15:51:09,965 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-11-25 15:51:09,966 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=146, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2022-11-25 15:51:09,967 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-11-25 15:51:09,967 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-11-25 15:51:09,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 90.38461538461539) internal successors, (1175), 13 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:09,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:09,968 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:09,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:10,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:10,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:51:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:10,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1805870785, now seen corresponding path program 3 times [2022-11-25 15:51:10,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935871599] [2022-11-25 15:51:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:10,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:10,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935871599] [2022-11-25 15:51:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935871599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:51:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251980382] [2022-11-25 15:51:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 15:51:10,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:10,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:10,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:10,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 15:51:10,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 15:51:10,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:51:10,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 15:51:10,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:10,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:51:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:10,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251980382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:51:10,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:51:10,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-25 15:51:10,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171572192] [2022-11-25 15:51:10,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:51:10,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 15:51:10,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 15:51:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-25 15:51:11,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 199 [2022-11-25 15:51:11,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:11,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:11,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 199 [2022-11-25 15:51:11,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:51:11,363 INFO L130 PetriNetUnfolder]: 457/689 cut-off events. [2022-11-25 15:51:11,363 INFO L131 PetriNetUnfolder]: For 4212/4212 co-relation queries the response was YES. [2022-11-25 15:51:11,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2140 conditions, 689 events. 457/689 cut-off events. For 4212/4212 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1645 event pairs, 20 based on Foata normal form. 108/645 useless extension candidates. Maximal degree in co-relation 2118. Up to 190 conditions per place. [2022-11-25 15:51:11,370 INFO L137 encePairwiseOnDemand]: 196/199 looper letters, 144 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2022-11-25 15:51:11,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 167 transitions, 840 flow [2022-11-25 15:51:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 15:51:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 15:51:11,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2315 transitions. [2022-11-25 15:51:11,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48471524288107204 [2022-11-25 15:51:11,378 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2315 transitions. [2022-11-25 15:51:11,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2315 transitions. [2022-11-25 15:51:11,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:51:11,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2315 transitions. [2022-11-25 15:51:11,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.45833333333333) internal successors, (2315), 24 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:11,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:11,395 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 199.0) internal successors, (4975), 25 states have internal predecessors, (4975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:11,395 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 24 states and 2315 transitions. [2022-11-25 15:51:11,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 167 transitions, 840 flow [2022-11-25 15:51:11,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 167 transitions, 768 flow, removed 31 selfloop flow, removed 5 redundant places. [2022-11-25 15:51:11,403 INFO L231 Difference]: Finished difference. Result has 71 places, 35 transitions, 266 flow [2022-11-25 15:51:11,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=266, PETRI_PLACES=71, PETRI_TRANSITIONS=35} [2022-11-25 15:51:11,404 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 53 predicate places. [2022-11-25 15:51:11,405 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 35 transitions, 266 flow [2022-11-25 15:51:11,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.2) internal successors, (2255), 25 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:11,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:51:11,406 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-25 15:51:11,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 15:51:11,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:11,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:51:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:51:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1256791745, now seen corresponding path program 4 times [2022-11-25 15:51:11,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:51:11,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302852443] [2022-11-25 15:51:11,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:51:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:51:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:51:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:13,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:51:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302852443] [2022-11-25 15:51:13,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302852443] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:51:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882472738] [2022-11-25 15:51:13,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 15:51:13,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:51:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:51:13,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:51:13,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 15:51:14,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 15:51:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 15:51:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-25 15:51:14,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:51:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:15,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:51:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:51:17,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882472738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:51:17,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:51:17,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2022-11-25 15:51:17,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703086700] [2022-11-25 15:51:17,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:51:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 15:51:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:51:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 15:51:17,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=904, Invalid=4066, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 15:51:20,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-25 15:51:20,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 35 transitions, 266 flow. Second operand has 71 states, 71 states have (on average 85.1830985915493) internal successors, (6048), 71 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:51:20,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:51:20,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-25 15:51:20,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 15:52:25,358 INFO L130 PetriNetUnfolder]: 68931/103414 cut-off events. [2022-11-25 15:52:25,359 INFO L131 PetriNetUnfolder]: For 594087/594087 co-relation queries the response was YES. [2022-11-25 15:52:25,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362188 conditions, 103414 events. 68931/103414 cut-off events. For 594087/594087 co-relation queries the response was YES. Maximal size of possible extension queue 2146. Compared 756046 event pairs, 98 based on Foata normal form. 193/77777 useless extension candidates. Maximal degree in co-relation 362154. Up to 26911 conditions per place. [2022-11-25 15:52:26,228 INFO L137 encePairwiseOnDemand]: 194/199 looper letters, 1504 selfloop transitions, 4625 changer transitions 0/6129 dead transitions. [2022-11-25 15:52:26,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 6129 transitions, 63083 flow [2022-11-25 15:52:26,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 301 states. [2022-11-25 15:52:26,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2022-11-25 15:52:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 27689 transitions. [2022-11-25 15:52:26,302 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4622614734803586 [2022-11-25 15:52:26,302 INFO L72 ComplementDD]: Start complementDD. Operand 301 states and 27689 transitions. [2022-11-25 15:52:26,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 301 states and 27689 transitions. [2022-11-25 15:52:26,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 15:52:26,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 301 states and 27689 transitions. [2022-11-25 15:52:26,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 302 states, 301 states have (on average 91.99003322259136) internal successors, (27689), 301 states have internal predecessors, (27689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:52:26,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 302 states, 302 states have (on average 199.0) internal successors, (60098), 302 states have internal predecessors, (60098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:52:26,498 INFO L81 ComplementDD]: Finished complementDD. Result has 302 states, 302 states have (on average 199.0) internal successors, (60098), 302 states have internal predecessors, (60098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:52:26,499 INFO L175 Difference]: Start difference. First operand has 71 places, 35 transitions, 266 flow. Second operand 301 states and 27689 transitions. [2022-11-25 15:52:26,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 6129 transitions, 63083 flow [2022-11-25 15:52:32,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 6129 transitions, 43625 flow, removed 8787 selfloop flow, removed 11 redundant places. [2022-11-25 15:52:33,040 INFO L231 Difference]: Finished difference. Result has 386 places, 4660 transitions, 28100 flow [2022-11-25 15:52:33,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=301, PETRI_FLOW=28100, PETRI_PLACES=386, PETRI_TRANSITIONS=4660} [2022-11-25 15:52:33,041 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 368 predicate places. [2022-11-25 15:52:33,041 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 4660 transitions, 28100 flow [2022-11-25 15:52:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 85.1830985915493) internal successors, (6048), 71 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:52:33,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 15:52:33,044 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 15:52:33,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 15:52:33,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:33,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 15:52:33,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 15:52:33,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2051874478, now seen corresponding path program 1 times [2022-11-25 15:52:33,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 15:52:33,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708575213] [2022-11-25 15:52:33,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:33,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 15:52:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:52:35,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 15:52:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708575213] [2022-11-25 15:52:35,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708575213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 15:52:35,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876349128] [2022-11-25 15:52:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 15:52:35,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 15:52:35,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 15:52:35,408 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 15:52:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1926da44-9866-4906-995d-330601b994ba/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 15:52:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 15:52:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-25 15:52:35,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 15:52:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 172 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:52:37,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 15:52:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 15:52:39,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876349128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 15:52:39,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 15:52:39,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 75 [2022-11-25 15:52:39,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559609931] [2022-11-25 15:52:39,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 15:52:39,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-25 15:52:39,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 15:52:39,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-25 15:52:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=4900, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 15:52:41,731 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 199 [2022-11-25 15:52:41,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 4660 transitions, 28100 flow. Second operand has 77 states, 77 states have (on average 85.20779220779221) internal successors, (6561), 77 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 15:52:41,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 15:52:41,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 199 [2022-11-25 15:52:41,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand