./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:45:02,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:45:02,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:45:02,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:45:02,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:45:02,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:45:02,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:45:02,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:45:02,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:45:02,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:45:02,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:45:02,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:45:02,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:45:02,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:45:02,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:45:02,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:45:02,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:45:02,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:45:02,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:45:02,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:45:02,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:45:02,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:45:02,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:45:02,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:45:02,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:45:02,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:45:02,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:45:02,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:45:02,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:45:02,602 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:45:02,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:45:02,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:45:02,604 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:45:02,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:45:02,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:45:02,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:45:02,605 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:45:02,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:45:02,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:45:02,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:45:02,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:45:02,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:45:02,621 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:45:02,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:45:02,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:45:02,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:45:02,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:45:02,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:45:02,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:45:02,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:45:02,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:45:02,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:45:02,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:45:02,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:45:02,625 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:45:02,626 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:45:02,626 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:45:02,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:45:02,626 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:45:02,626 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_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 [2022-12-13 11:45:02,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:45:02,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:45:02,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:45:02,817 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:45:02,817 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:45:02,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread/fib_safe-5.i [2022-12-13 11:45:05,475 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:45:05,673 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:45:05,673 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/sv-benchmarks/c/pthread/fib_safe-5.i [2022-12-13 11:45:05,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/data/279b4da9c/cdb826d2b0cb47a582b5353a18378bbf/FLAG29fc6ccbc [2022-12-13 11:45:05,697 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/data/279b4da9c/cdb826d2b0cb47a582b5353a18378bbf [2022-12-13 11:45:05,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:45:05,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:45:05,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:45:05,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:45:05,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:45:05,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:45:05" (1/1) ... [2022-12-13 11:45:05,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d2d15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:05, skipping insertion in model container [2022-12-13 11:45:05,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:45:05" (1/1) ... [2022-12-13 11:45:05,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:45:05,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:45:05,960 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_a53e63f3-458d-4d01-986d-2815179e7b53/sv-benchmarks/c/pthread/fib_safe-5.i[30241,30254] [2022-12-13 11:45:05,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:05,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:05,971 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:05,972 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:05,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:05,975 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:05,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:05,976 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:05,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:05,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:05,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:45:05,989 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:45:06,025 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_a53e63f3-458d-4d01-986d-2815179e7b53/sv-benchmarks/c/pthread/fib_safe-5.i[30241,30254] [2022-12-13 11:45:06,026 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:06,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:06,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:06,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:06,031 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:06,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:06,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:06,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:06,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 11:45:06,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 11:45:06,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:45:06,061 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:45:06,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06 WrapperNode [2022-12-13 11:45:06,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:45:06,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:45:06,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:45:06,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:45:06,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,095 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-12-13 11:45:06,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:45:06,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:45:06,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:45:06,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:45:06,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,116 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,117 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:45:06,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:45:06,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:45:06,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:45:06,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (1/1) ... [2022-12-13 11:45:06,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:45:06,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:06,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:45:06,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-12-13 11:45:06,179 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-12-13 11:45:06,179 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:45:06,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:45:06,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 11:45:06,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:45:06,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:45:06,181 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:45:06,283 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:45:06,284 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:45:06,424 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:45:06,430 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:45:06,430 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 11:45:06,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:45:06 BoogieIcfgContainer [2022-12-13 11:45:06,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:45:06,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:45:06,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:45:06,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:45:06,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:45:05" (1/3) ... [2022-12-13 11:45:06,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fd9e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:45:06, skipping insertion in model container [2022-12-13 11:45:06,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:45:06" (2/3) ... [2022-12-13 11:45:06,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fd9e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:45:06, skipping insertion in model container [2022-12-13 11:45:06,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:45:06" (3/3) ... [2022-12-13 11:45:06,439 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2022-12-13 11:45:06,446 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 11:45:06,454 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:45:06,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:45:06,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:45:06,496 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 11:45:06,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 11:45:06,557 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 11:45:06,557 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:06,561 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. [2022-12-13 11:45:06,562 INFO L82 GeneralOperation]: Start removeDead. Operand has 101 places, 101 transitions, 212 flow [2022-12-13 11:45:06,565 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 204 flow [2022-12-13 11:45:06,568 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:45:06,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 11:45:06,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 204 flow [2022-12-13 11:45:06,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 204 flow [2022-12-13 11:45:06,628 INFO L130 PetriNetUnfolder]: 7/99 cut-off events. [2022-12-13 11:45:06,628 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:06,629 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. [2022-12-13 11:45:06,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 2134 [2022-12-13 11:45:08,931 INFO L134 LiptonReduction]: Checked pairs total: 1542 [2022-12-13 11:45:08,931 INFO L136 LiptonReduction]: Total number of compositions: 97 [2022-12-13 11:45:08,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:45:08,948 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;@3d2bce79, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:45:08,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 11:45:08,952 INFO L130 PetriNetUnfolder]: 3/12 cut-off events. [2022-12-13 11:45:08,952 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:45:08,952 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:08,953 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:45:08,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1641818498, now seen corresponding path program 1 times [2022-12-13 11:45:08,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:08,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773897637] [2022-12-13 11:45:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:08,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:09,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:09,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773897637] [2022-12-13 11:45:09,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773897637] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:45:09,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:45:09,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:45:09,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548744914] [2022-12-13 11:45:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:45:09,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:45:09,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:45:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:45:09,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 198 [2022-12-13 11:45:09,216 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) [2022-12-13 11:45:09,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:09,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 198 [2022-12-13 11:45:09,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:09,269 INFO L130 PetriNetUnfolder]: 97/149 cut-off events. [2022-12-13 11:45:09,269 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:45:09,269 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 331 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. [2022-12-13 11:45:09,271 INFO L137 encePairwiseOnDemand]: 194/198 looper letters, 18 selfloop transitions, 2 changer transitions 1/21 dead transitions. [2022-12-13 11:45:09,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 90 flow [2022-12-13 11:45:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:45:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:45:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2022-12-13 11:45:09,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326599326599324 [2022-12-13 11:45:09,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2022-12-13 11:45:09,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2022-12-13 11:45:09,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:09,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2022-12-13 11:45:09,288 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) [2022-12-13 11:45:09,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 198.0) internal successors, (792), 4 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,294 INFO L175 Difference]: Start difference. First operand has 18 places, 14 transitions, 34 flow. Second operand 3 states and 293 transitions. [2022-12-13 11:45:09,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 90 flow [2022-12-13 11:45:09,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:45:09,297 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 42 flow [2022-12-13 11:45:09,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, 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} [2022-12-13 11:45:09,301 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 1 predicate places. [2022-12-13 11:45:09,301 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 42 flow [2022-12-13 11:45:09,301 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) [2022-12-13 11:45:09,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:09,301 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:09,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:45:09,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 643234342, now seen corresponding path program 1 times [2022-12-13 11:45:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:09,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282597357] [2022-12-13 11:45:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:09,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282597357] [2022-12-13 11:45:09,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282597357] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595847396] [2022-12-13 11:45:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:09,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:09,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:09,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:45:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:45:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:09,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595847396] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:09,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:09,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 11:45:09,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114901018] [2022-12-13 11:45:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:09,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:45:09,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:45:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:45:09,516 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:45:09,516 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) [2022-12-13 11:45:09,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:09,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:45:09,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:09,591 INFO L130 PetriNetUnfolder]: 133/203 cut-off events. [2022-12-13 11:45:09,591 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:45:09,591 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. [2022-12-13 11:45:09,592 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 36 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2022-12-13 11:45:09,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 41 transitions, 184 flow [2022-12-13 11:45:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:45:09,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:45:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 578 transitions. [2022-12-13 11:45:09,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2022-12-13 11:45:09,595 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 578 transitions. [2022-12-13 11:45:09,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 578 transitions. [2022-12-13 11:45:09,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:09,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 578 transitions. [2022-12-13 11:45:09,596 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) [2022-12-13 11:45:09,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,599 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 198.0) internal successors, (1386), 7 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:09,599 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 42 flow. Second operand 6 states and 578 transitions. [2022-12-13 11:45:09,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 41 transitions, 184 flow [2022-12-13 11:45:09,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:45:09,600 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 76 flow [2022-12-13 11:45:09,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, 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} [2022-12-13 11:45:09,600 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 7 predicate places. [2022-12-13 11:45:09,600 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 76 flow [2022-12-13 11:45:09,601 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) [2022-12-13 11:45:09,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:09,601 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:09,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:45:09,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:09,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:09,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1549565826, now seen corresponding path program 2 times [2022-12-13 11:45:09,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:09,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828702851] [2022-12-13 11:45:09,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:09,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:09,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828702851] [2022-12-13 11:45:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828702851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:09,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778637417] [2022-12-13 11:45:09,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:45:09,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:09,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:09,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:09,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:45:10,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:45:10,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:45:10,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778637417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:10,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:10,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 11:45:10,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686040776] [2022-12-13 11:45:10,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:10,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 11:45:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 11:45:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:45:10,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:45:10,137 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) [2022-12-13 11:45:10,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:10,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:45:10,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:10,281 INFO L130 PetriNetUnfolder]: 241/365 cut-off events. [2022-12-13 11:45:10,281 INFO L131 PetriNetUnfolder]: For 216/216 co-relation queries the response was YES. [2022-12-13 11:45:10,282 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 846 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. [2022-12-13 11:45:10,284 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 72 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2022-12-13 11:45:10,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 83 transitions, 398 flow [2022-12-13 11:45:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 11:45:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 11:45:10,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1157 transitions. [2022-12-13 11:45:10,289 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48695286195286197 [2022-12-13 11:45:10,289 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1157 transitions. [2022-12-13 11:45:10,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1157 transitions. [2022-12-13 11:45:10,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:10,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1157 transitions. [2022-12-13 11:45:10,294 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) [2022-12-13 11:45:10,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,301 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 198.0) internal successors, (2574), 13 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,301 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 76 flow. Second operand 12 states and 1157 transitions. [2022-12-13 11:45:10,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 83 transitions, 398 flow [2022-12-13 11:45:10,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 83 transitions, 384 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:45:10,305 INFO L231 Difference]: Finished difference. Result has 41 places, 23 transitions, 146 flow [2022-12-13 11:45:10,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, 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} [2022-12-13 11:45:10,306 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 23 predicate places. [2022-12-13 11:45:10,306 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 146 flow [2022-12-13 11:45:10,306 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) [2022-12-13 11:45:10,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:10,307 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:10,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:45:10,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:10,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -698507394, now seen corresponding path program 3 times [2022-12-13 11:45:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:10,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50093464] [2022-12-13 11:45:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50093464] [2022-12-13 11:45:10,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50093464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:10,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405669333] [2022-12-13 11:45:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:45:10,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:10,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:10,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:45:10,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:45:10,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:10,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:45:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:10,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405669333] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:10,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:10,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2022-12-13 11:45:10,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472270006] [2022-12-13 11:45:10,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:10,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:45:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:10,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:45:10,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:45:10,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 198 [2022-12-13 11:45:10,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 146 flow. Second operand has 15 states, 15 states have (on average 90.4) internal successors, (1356), 15 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:10,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:10,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 198 [2022-12-13 11:45:10,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:11,014 INFO L130 PetriNetUnfolder]: 277/419 cut-off events. [2022-12-13 11:45:11,015 INFO L131 PetriNetUnfolder]: For 972/972 co-relation queries the response was YES. [2022-12-13 11:45:11,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1330 conditions, 419 events. 277/419 cut-off events. For 972/972 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 981 event pairs, 20 based on Foata normal form. 18/345 useless extension candidates. Maximal degree in co-relation 1308. Up to 100 conditions per place. [2022-12-13 11:45:11,017 INFO L137 encePairwiseOnDemand]: 195/198 looper letters, 84 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2022-12-13 11:45:11,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 97 transitions, 500 flow [2022-12-13 11:45:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:45:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-13 11:45:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1345 transitions. [2022-12-13 11:45:11,019 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4852092352092352 [2022-12-13 11:45:11,019 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1345 transitions. [2022-12-13 11:45:11,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1345 transitions. [2022-12-13 11:45:11,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:11,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1345 transitions. [2022-12-13 11:45:11,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.07142857142857) internal successors, (1345), 14 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:11,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:11,031 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 198.0) internal successors, (2970), 15 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:11,031 INFO L175 Difference]: Start difference. First operand has 41 places, 23 transitions, 146 flow. Second operand 14 states and 1345 transitions. [2022-12-13 11:45:11,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 97 transitions, 500 flow [2022-12-13 11:45:11,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 448 flow, removed 21 selfloop flow, removed 5 redundant places. [2022-12-13 11:45:11,037 INFO L231 Difference]: Finished difference. Result has 51 places, 25 transitions, 146 flow [2022-12-13 11:45:11,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, 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=14, PETRI_FLOW=146, PETRI_PLACES=51, PETRI_TRANSITIONS=25} [2022-12-13 11:45:11,037 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 33 predicate places. [2022-12-13 11:45:11,038 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 25 transitions, 146 flow [2022-12-13 11:45:11,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.4) internal successors, (1356), 15 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:11,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:11,038 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:11,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 11:45:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:11,239 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:11,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1250700162, now seen corresponding path program 4 times [2022-12-13 11:45:11,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817388838] [2022-12-13 11:45:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:11,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:11,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:11,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817388838] [2022-12-13 11:45:11,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817388838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:11,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975757961] [2022-12-13 11:45:11,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:45:11,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:11,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:11,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:45:11,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:45:11,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:45:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-13 11:45:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:12,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:12,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975757961] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:12,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:12,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-12-13 11:45:12,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639536292] [2022-12-13 11:45:12,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:12,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:45:12,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:45:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:45:13,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 11:45:13,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 25 transitions, 146 flow. Second operand has 41 states, 41 states have (on average 85.3170731707317) internal successors, (3498), 41 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:13,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:13,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 11:45:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:19,449 INFO L130 PetriNetUnfolder]: 12971/19464 cut-off events. [2022-12-13 11:45:19,449 INFO L131 PetriNetUnfolder]: For 55047/55047 co-relation queries the response was YES. [2022-12-13 11:45:19,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61138 conditions, 19464 events. 12971/19464 cut-off events. For 55047/55047 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 120204 event pairs, 64 based on Foata normal form. 113/14727 useless extension candidates. Maximal degree in co-relation 61114. Up to 4060 conditions per place. [2022-12-13 11:45:19,547 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 529 selfloop transitions, 925 changer transitions 0/1454 dead transitions. [2022-12-13 11:45:19,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 1454 transitions, 11283 flow [2022-12-13 11:45:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-12-13 11:45:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-12-13 11:45:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 9749 transitions. [2022-12-13 11:45:19,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46450352582428056 [2022-12-13 11:45:19,569 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 9749 transitions. [2022-12-13 11:45:19,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 9749 transitions. [2022-12-13 11:45:19,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:45:19,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 9749 transitions. [2022-12-13 11:45:19,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 91.97169811320755) internal successors, (9749), 106 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:19,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 198.0) internal successors, (21186), 107 states have internal predecessors, (21186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:19,605 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 198.0) internal successors, (21186), 107 states have internal predecessors, (21186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:19,605 INFO L175 Difference]: Start difference. First operand has 51 places, 25 transitions, 146 flow. Second operand 106 states and 9749 transitions. [2022-12-13 11:45:19,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 1454 transitions, 11283 flow [2022-12-13 11:45:19,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 1454 transitions, 9145 flow, removed 597 selfloop flow, removed 11 redundant places. [2022-12-13 11:45:19,848 INFO L231 Difference]: Finished difference. Result has 161 places, 950 transitions, 5765 flow [2022-12-13 11:45:19,848 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=5765, PETRI_PLACES=161, PETRI_TRANSITIONS=950} [2022-12-13 11:45:19,849 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 143 predicate places. [2022-12-13 11:45:19,849 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 950 transitions, 5765 flow [2022-12-13 11:45:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 85.3170731707317) internal successors, (3498), 41 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:19,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:45:19,850 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:45:19,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:45:20,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:20,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:45:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:45:20,053 INFO L85 PathProgramCache]: Analyzing trace with hash -662189678, now seen corresponding path program 1 times [2022-12-13 11:45:20,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:45:20,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869233629] [2022-12-13 11:45:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:45:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:20,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:45:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869233629] [2022-12-13 11:45:20,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869233629] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:45:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781765641] [2022-12-13 11:45:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:45:20,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:45:20,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:45:20,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:45:20,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:45:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:45:20,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 11:45:20,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:45:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:45:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:45:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781765641] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:45:21,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:45:21,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 11:45:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191016643] [2022-12-13 11:45:21,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:45:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 11:45:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:45:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 11:45:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 11:45:22,337 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 11:45:22,339 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 950 transitions, 5765 flow. Second operand has 47 states, 47 states have (on average 85.34042553191489) internal successors, (4011), 47 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:45:22,339 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:45:22,339 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 11:45:22,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:46:17,063 INFO L130 PetriNetUnfolder]: 180647/270850 cut-off events. [2022-12-13 11:46:17,064 INFO L131 PetriNetUnfolder]: For 6124755/6124755 co-relation queries the response was YES. [2022-12-13 11:46:18,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127796 conditions, 270850 events. 180647/270850 cut-off events. For 6124755/6124755 co-relation queries the response was YES. Maximal size of possible extension queue 12527. Compared 2406168 event pairs, 3576 based on Foata normal form. 4316/275166 useless extension candidates. Maximal degree in co-relation 1127756. Up to 51905 conditions per place. [2022-12-13 11:46:19,774 INFO L137 encePairwiseOnDemand]: 193/198 looper letters, 1865 selfloop transitions, 25312 changer transitions 0/27177 dead transitions. [2022-12-13 11:46:19,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 27177 transitions, 212206 flow [2022-12-13 11:46:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 246 states. [2022-12-13 11:46:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2022-12-13 11:46:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 22379 transitions. [2022-12-13 11:46:19,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45945224603761187 [2022-12-13 11:46:19,793 INFO L72 ComplementDD]: Start complementDD. Operand 246 states and 22379 transitions. [2022-12-13 11:46:19,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 246 states and 22379 transitions. [2022-12-13 11:46:19,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:19,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 246 states and 22379 transitions. [2022-12-13 11:46:19,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 247 states, 246 states have (on average 90.97154471544715) internal successors, (22379), 246 states have internal predecessors, (22379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:19,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 247 states, 247 states have (on average 198.0) internal successors, (48906), 247 states have internal predecessors, (48906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:19,930 INFO L81 ComplementDD]: Finished complementDD. Result has 247 states, 247 states have (on average 198.0) internal successors, (48906), 247 states have internal predecessors, (48906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:46:19,930 INFO L175 Difference]: Start difference. First operand has 161 places, 950 transitions, 5765 flow. Second operand 246 states and 22379 transitions. [2022-12-13 11:46:19,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 27177 transitions, 212206 flow [2022-12-13 11:51:53,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 27177 transitions, 210078 flow, removed 1064 selfloop flow, removed 0 redundant places. [2022-12-13 11:51:53,662 INFO L231 Difference]: Finished difference. Result has 471 places, 26195 transitions, 212347 flow [2022-12-13 11:51:53,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=889, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=246, PETRI_FLOW=212347, PETRI_PLACES=471, PETRI_TRANSITIONS=26195} [2022-12-13 11:51:53,664 INFO L288 CegarLoopForPetriNet]: 18 programPoint places, 453 predicate places. [2022-12-13 11:51:53,664 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 26195 transitions, 212347 flow [2022-12-13 11:51:53,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 85.34042553191489) internal successors, (4011), 47 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:53,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:51:53,665 INFO L209 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:51:53,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 11:51:53,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:53,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:51:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:51:53,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1010112524, now seen corresponding path program 1 times [2022-12-13 11:51:53,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:51:53,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680573970] [2022-12-13 11:51:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:53,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:51:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:51:54,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680573970] [2022-12-13 11:51:54,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680573970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:51:54,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711653563] [2022-12-13 11:51:54,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:51:54,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:51:54,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:51:54,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:51:54,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a53e63f3-458d-4d01-986d-2815179e7b53/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:51:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:51:54,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 11:51:54,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:51:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:54,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:51:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:51:55,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711653563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:51:55,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:51:55,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-12-13 11:51:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144253637] [2022-12-13 11:51:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:51:55,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 11:51:55,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:51:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 11:51:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 11:51:55,885 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 198 [2022-12-13 11:51:55,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 26195 transitions, 212347 flow. Second operand has 47 states, 47 states have (on average 85.34042553191489) internal successors, (4011), 47 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:51:55,887 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:51:55,887 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 198 [2022-12-13 11:51:55,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand