./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/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_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/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_c477fb49-69e4-4798-9424-39915cf68c22/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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- 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 15:50:25,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:50:25,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:50:25,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:50:25,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:50:25,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:50:25,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:50:25,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:50:25,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:50:25,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:50:25,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:50:25,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:50:25,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:50:25,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:50:25,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:50:25,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:50:25,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:50:25,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:50:25,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:50:25,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:50:25,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:50:25,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:50:25,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:50:25,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:50:25,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:50:25,987 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:50:25,987 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:50:25,988 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:50:25,988 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:50:25,989 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:50:25,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:50:25,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:50:25,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:50:25,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:50:25,991 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:50:25,991 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:50:25,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:50:25,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:50:25,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:50:25,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:50:25,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:50:25,993 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:50:26,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:50:26,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:50:26,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:50:26,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:50:26,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:50:26,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:50:26,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:50:26,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:50:26,008 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:50:26,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:50:26,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:50:26,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:50:26,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:50:26,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:50:26,011 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:50:26,012 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_c477fb49-69e4-4798-9424-39915cf68c22/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2022-12-13 15:50:26,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:50:26,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:50:26,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:50:26,243 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:50:26,243 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:50:26,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-lit/sssc12.i [2022-12-13 15:50:28,729 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:50:28,978 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:50:28,978 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/sv-benchmarks/c/pthread-lit/sssc12.i [2022-12-13 15:50:28,990 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/data/dda12addc/e2494bba4049482e990ac402471fad67/FLAGbe2ec2fc4 [2022-12-13 15:50:29,292 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/data/dda12addc/e2494bba4049482e990ac402471fad67 [2022-12-13 15:50:29,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:50:29,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:50:29,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:50:29,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:50:29,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:50:29,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0faf2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29, skipping insertion in model container [2022-12-13 15:50:29,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:50:29,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:50:29,614 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_c477fb49-69e4-4798-9424-39915cf68c22/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-12-13 15:50:29,619 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:50:29,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:50:29,620 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:50:29,621 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:50:29,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:50:29,636 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:50:29,661 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_c477fb49-69e4-4798-9424-39915cf68c22/sv-benchmarks/c/pthread-lit/sssc12.i[46865,46878] [2022-12-13 15:50:29,661 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:50:29,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:50:29,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 15:50:29,662 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 15:50:29,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:50:29,694 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:50:29,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29 WrapperNode [2022-12-13 15:50:29,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:50:29,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:50:29,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:50:29,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:50:29,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,723 INFO L138 Inliner]: procedures = 275, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-12-13 15:50:29,724 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:50:29,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:50:29,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:50:29,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:50:29,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:50:29,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:50:29,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:50:29,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:50:29,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (1/1) ... [2022-12-13 15:50:29,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:50:29,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:50:29,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:50:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:50:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 15:50:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2022-12-13 15:50:29,798 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2022-12-13 15:50:29,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:50:29,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:50:29,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:50:29,801 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 15:50:29,891 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:50:29,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:50:30,020 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:50:30,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:50:30,046 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 15:50:30,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:50:30 BoogieIcfgContainer [2022-12-13 15:50:30,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:50:30,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:50:30,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:50:30,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:50:30,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:50:29" (1/3) ... [2022-12-13 15:50:30,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4770854c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:50:30, skipping insertion in model container [2022-12-13 15:50:30,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:50:29" (2/3) ... [2022-12-13 15:50:30,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4770854c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:50:30, skipping insertion in model container [2022-12-13 15:50:30,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:50:30" (3/3) ... [2022-12-13 15:50:30,057 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2022-12-13 15:50:30,065 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 15:50:30,076 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:50:30,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:50:30,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 15:50:30,120 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:50:30,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,184 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-12-13 15:50:30,184 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:50:30,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-12-13 15:50:30,188 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,191 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,194 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:50:30,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,203 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 82 transitions, 169 flow [2022-12-13 15:50:30,226 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-12-13 15:50:30,226 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:50:30,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2022-12-13 15:50:30,228 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2022-12-13 15:50:32,424 INFO L134 LiptonReduction]: Checked pairs total: 895 [2022-12-13 15:50:32,424 INFO L136 LiptonReduction]: Total number of compositions: 91 [2022-12-13 15:50:32,435 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:50:32,439 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;@69c1a565, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:50:32,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 15:50:32,441 INFO L130 PetriNetUnfolder]: 1/10 cut-off events. [2022-12-13 15:50:32,442 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:50:32,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:32,442 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:50:32,442 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:50:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 373852104, now seen corresponding path program 1 times [2022-12-13 15:50:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:32,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100205266] [2022-12-13 15:50:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:32,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:50:32,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100205266] [2022-12-13 15:50:32,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100205266] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:32,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:32,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:50:32,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457649943] [2022-12-13 15:50:32,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:50:32,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:32,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:50:32,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:50:32,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 173 [2022-12-13 15:50:32,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 15:50:32,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:32,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 173 [2022-12-13 15:50:32,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:32,873 INFO L130 PetriNetUnfolder]: 13/34 cut-off events. [2022-12-13 15:50:32,873 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 15:50:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 34 events. 13/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 66 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 60. Up to 19 conditions per place. [2022-12-13 15:50:32,874 INFO L137 encePairwiseOnDemand]: 168/173 looper letters, 11 selfloop transitions, 3 changer transitions 0/15 dead transitions. [2022-12-13 15:50:32,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 15 transitions, 63 flow [2022-12-13 15:50:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:50:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 15:50:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2022-12-13 15:50:32,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3901734104046243 [2022-12-13 15:50:32,886 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 270 transitions. [2022-12-13 15:50:32,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 270 transitions. [2022-12-13 15:50:32,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:32,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 270 transitions. [2022-12-13 15:50:32,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.5) internal successors, (270), 4 states have internal predecessors, (270), 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 15:50:32,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 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 15:50:32,898 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 173.0) internal successors, (865), 5 states have internal predecessors, (865), 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 15:50:32,900 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 25 flow. Second operand 4 states and 270 transitions. [2022-12-13 15:50:32,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 15 transitions, 63 flow [2022-12-13 15:50:32,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 15:50:32,902 INFO L231 Difference]: Finished difference. Result has 15 places, 10 transitions, 37 flow [2022-12-13 15:50:32,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=173, PETRI_DIFFERENCE_MINUEND_FLOW=23, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=37, PETRI_PLACES=15, PETRI_TRANSITIONS=10} [2022-12-13 15:50:32,906 INFO L288 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2022-12-13 15:50:32,906 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 10 transitions, 37 flow [2022-12-13 15:50:32,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 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 15:50:32,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:32,907 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 15:50:32,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:50:32,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:50:32,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:32,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1295548641, now seen corresponding path program 1 times [2022-12-13 15:50:32,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:32,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744326650] [2022-12-13 15:50:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:50:32,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:50:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:50:32,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:50:32,955 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:50:32,957 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 15:50:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 15:50:32,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 15:50:32,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:50:32,960 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 15:50:32,963 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:50:32,963 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 15:50:32,978 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:50:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,006 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-12-13 15:50:33,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:50:33,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 256 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-12-13 15:50:33,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,010 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,010 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:50:33,010 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,010 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 116 transitions, 244 flow [2022-12-13 15:50:33,032 INFO L130 PetriNetUnfolder]: 12/142 cut-off events. [2022-12-13 15:50:33,032 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 15:50:33,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 142 events. 12/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 256 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2022-12-13 15:50:33,036 INFO L119 LiptonReduction]: Number of co-enabled transitions 4224 [2022-12-13 15:50:34,871 INFO L134 LiptonReduction]: Checked pairs total: 6990 [2022-12-13 15:50:34,872 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-12-13 15:50:34,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:50:34,875 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;@69c1a565, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:50:34,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 15:50:34,877 INFO L130 PetriNetUnfolder]: 2/18 cut-off events. [2022-12-13 15:50:34,878 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:50:34,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:34,878 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:34,878 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:50:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:34,878 INFO L85 PathProgramCache]: Analyzing trace with hash -21127721, now seen corresponding path program 1 times [2022-12-13 15:50:34,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:34,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947506396] [2022-12-13 15:50:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:34,934 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 15:50:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947506396] [2022-12-13 15:50:34,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947506396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:34,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:34,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:50:34,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638176875] [2022-12-13 15:50:34,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:34,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:50:34,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:50:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:50:34,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 230 [2022-12-13 15:50:34,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 15:50:34,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:34,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 230 [2022-12-13 15:50:34,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:35,042 INFO L130 PetriNetUnfolder]: 301/519 cut-off events. [2022-12-13 15:50:35,042 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 15:50:35,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 519 events. 301/519 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2583 event pairs, 132 based on Foata normal form. 0/386 useless extension candidates. Maximal degree in co-relation 458. Up to 291 conditions per place. [2022-12-13 15:50:35,045 INFO L137 encePairwiseOnDemand]: 225/230 looper letters, 32 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-12-13 15:50:35,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 163 flow [2022-12-13 15:50:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:50:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:50:35,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2022-12-13 15:50:35,047 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4681159420289855 [2022-12-13 15:50:35,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2022-12-13 15:50:35,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2022-12-13 15:50:35,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:35,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2022-12-13 15:50:35,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:50:35,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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 15:50:35,049 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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 15:50:35,050 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 323 transitions. [2022-12-13 15:50:35,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 163 flow [2022-12-13 15:50:35,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 161 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 15:50:35,051 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 74 flow [2022-12-13 15:50:35,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2022-12-13 15:50:35,051 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2022-12-13 15:50:35,051 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 74 flow [2022-12-13 15:50:35,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 15:50:35,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:35,052 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:35,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:50:35,052 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:50:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash 668612143, now seen corresponding path program 1 times [2022-12-13 15:50:35,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:35,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976386759] [2022-12-13 15:50:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:35,141 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 15:50:35,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:35,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976386759] [2022-12-13 15:50:35,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976386759] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:35,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:35,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:50:35,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010668643] [2022-12-13 15:50:35,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:35,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:50:35,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:50:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:50:35,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 230 [2022-12-13 15:50:35,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 74 flow. Second operand has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 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 15:50:35,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:35,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 230 [2022-12-13 15:50:35,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:35,352 INFO L130 PetriNetUnfolder]: 494/882 cut-off events. [2022-12-13 15:50:35,352 INFO L131 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2022-12-13 15:50:35,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 882 events. 494/882 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4955 event pairs, 107 based on Foata normal form. 0/700 useless extension candidates. Maximal degree in co-relation 1018. Up to 320 conditions per place. [2022-12-13 15:50:35,356 INFO L137 encePairwiseOnDemand]: 219/230 looper letters, 68 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2022-12-13 15:50:35,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 84 transitions, 381 flow [2022-12-13 15:50:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:50:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:50:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 605 transitions. [2022-12-13 15:50:35,358 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4384057971014493 [2022-12-13 15:50:35,358 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 605 transitions. [2022-12-13 15:50:35,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 605 transitions. [2022-12-13 15:50:35,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:35,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 605 transitions. [2022-12-13 15:50:35,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.83333333333333) internal successors, (605), 6 states have internal predecessors, (605), 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 15:50:35,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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 15:50:35,362 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 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 15:50:35,362 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 74 flow. Second operand 6 states and 605 transitions. [2022-12-13 15:50:35,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 84 transitions, 381 flow [2022-12-13 15:50:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 84 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:50:35,364 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 157 flow [2022-12-13 15:50:35,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=157, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2022-12-13 15:50:35,365 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2022-12-13 15:50:35,365 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 157 flow [2022-12-13 15:50:35,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 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 15:50:35,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:35,365 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 15:50:35,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:50:35,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 15:50:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash -83812675, now seen corresponding path program 1 times [2022-12-13 15:50:35,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:35,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718714875] [2022-12-13 15:50:35,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:35,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:50:35,378 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:50:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:50:35,386 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:50:35,386 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:50:35,387 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 15:50:35,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 15:50:35,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 15:50:35,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 15:50:35,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:50:35,387 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 15:50:35,388 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:50:35,388 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 15:50:35,404 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:50:35,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,430 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-12-13 15:50:35,430 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:50:35,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 444 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-12-13 15:50:35,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,432 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:50:35,432 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,432 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 150 transitions, 321 flow [2022-12-13 15:50:35,445 INFO L130 PetriNetUnfolder]: 17/190 cut-off events. [2022-12-13 15:50:35,445 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 15:50:35,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 190 events. 17/190 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 444 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 146. Up to 8 conditions per place. [2022-12-13 15:50:35,449 INFO L119 LiptonReduction]: Number of co-enabled transitions 9702 [2022-12-13 15:50:37,613 INFO L134 LiptonReduction]: Checked pairs total: 19131 [2022-12-13 15:50:37,613 INFO L136 LiptonReduction]: Total number of compositions: 148 [2022-12-13 15:50:37,614 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:50:37,614 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;@69c1a565, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:50:37,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 15:50:37,616 INFO L130 PetriNetUnfolder]: 1/17 cut-off events. [2022-12-13 15:50:37,616 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:50:37,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:37,616 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:37,617 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:50:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:37,617 INFO L85 PathProgramCache]: Analyzing trace with hash -838420762, now seen corresponding path program 1 times [2022-12-13 15:50:37,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871825705] [2022-12-13 15:50:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:37,648 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 15:50:37,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:37,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871825705] [2022-12-13 15:50:37,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871825705] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:37,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:37,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:50:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996359007] [2022-12-13 15:50:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:37,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:50:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:50:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:50:37,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 298 [2022-12-13 15:50:37,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 15:50:37,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:37,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 298 [2022-12-13 15:50:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:38,034 INFO L130 PetriNetUnfolder]: 3661/5354 cut-off events. [2022-12-13 15:50:38,034 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-12-13 15:50:38,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10869 conditions, 5354 events. 3661/5354 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 30567 event pairs, 1602 based on Foata normal form. 0/3836 useless extension candidates. Maximal degree in co-relation 1850. Up to 2937 conditions per place. [2022-12-13 15:50:38,055 INFO L137 encePairwiseOnDemand]: 293/298 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2022-12-13 15:50:38,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 59 transitions, 255 flow [2022-12-13 15:50:38,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:50:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:50:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2022-12-13 15:50:38,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4753914988814318 [2022-12-13 15:50:38,057 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2022-12-13 15:50:38,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2022-12-13 15:50:38,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:38,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2022-12-13 15:50:38,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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 15:50:38,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 15:50:38,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 15:50:38,059 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 101 flow. Second operand 3 states and 425 transitions. [2022-12-13 15:50:38,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 59 transitions, 255 flow [2022-12-13 15:50:38,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 247 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 15:50:38,061 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 103 flow [2022-12-13 15:50:38,061 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2022-12-13 15:50:38,062 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2022-12-13 15:50:38,062 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 103 flow [2022-12-13 15:50:38,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 15:50:38,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:38,062 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:38,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:50:38,063 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:50:38,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:38,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1933700164, now seen corresponding path program 1 times [2022-12-13 15:50:38,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:38,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315094942] [2022-12-13 15:50:38,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:38,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:38,136 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 15:50:38,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:38,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315094942] [2022-12-13 15:50:38,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315094942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:38,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:38,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:50:38,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644134732] [2022-12-13 15:50:38,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:38,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:50:38,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:38,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:50:38,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:50:38,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 298 [2022-12-13 15:50:38,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 103 flow. Second operand has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 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 15:50:38,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:38,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 298 [2022-12-13 15:50:38,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:39,024 INFO L130 PetriNetUnfolder]: 7244/10582 cut-off events. [2022-12-13 15:50:39,024 INFO L131 PetriNetUnfolder]: For 1284/1284 co-relation queries the response was YES. [2022-12-13 15:50:39,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22293 conditions, 10582 events. 7244/10582 cut-off events. For 1284/1284 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 67780 event pairs, 1147 based on Foata normal form. 0/7954 useless extension candidates. Maximal degree in co-relation 12159. Up to 4200 conditions per place. [2022-12-13 15:50:39,083 INFO L137 encePairwiseOnDemand]: 284/298 looper letters, 109 selfloop transitions, 13 changer transitions 0/130 dead transitions. [2022-12-13 15:50:39,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 130 transitions, 586 flow [2022-12-13 15:50:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:50:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:50:39,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2022-12-13 15:50:39,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44798657718120805 [2022-12-13 15:50:39,086 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2022-12-13 15:50:39,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2022-12-13 15:50:39,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:39,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2022-12-13 15:50:39,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 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 15:50:39,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 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 15:50:39,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 298.0) internal successors, (2086), 7 states have internal predecessors, (2086), 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 15:50:39,091 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 103 flow. Second operand 6 states and 801 transitions. [2022-12-13 15:50:39,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 130 transitions, 586 flow [2022-12-13 15:50:39,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 130 transitions, 572 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:50:39,099 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 213 flow [2022-12-13 15:50:39,099 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=213, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2022-12-13 15:50:39,099 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2022-12-13 15:50:39,100 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 213 flow [2022-12-13 15:50:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 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 15:50:39,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:39,100 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:39,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:50:39,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:50:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1238029264, now seen corresponding path program 1 times [2022-12-13 15:50:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:39,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423485944] [2022-12-13 15:50:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:50:39,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423485944] [2022-12-13 15:50:39,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423485944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:39,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:39,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:50:39,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482719195] [2022-12-13 15:50:39,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:39,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:50:39,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:39,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:50:39,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:50:39,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 298 [2022-12-13 15:50:39,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:50:39,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:39,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 298 [2022-12-13 15:50:39,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:40,105 INFO L130 PetriNetUnfolder]: 9377/13869 cut-off events. [2022-12-13 15:50:40,106 INFO L131 PetriNetUnfolder]: For 7940/8337 co-relation queries the response was YES. [2022-12-13 15:50:40,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34868 conditions, 13869 events. 9377/13869 cut-off events. For 7940/8337 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 94407 event pairs, 4017 based on Foata normal form. 163/11881 useless extension candidates. Maximal degree in co-relation 13955. Up to 7790 conditions per place. [2022-12-13 15:50:40,162 INFO L137 encePairwiseOnDemand]: 294/298 looper letters, 68 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2022-12-13 15:50:40,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 472 flow [2022-12-13 15:50:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:50:40,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:50:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2022-12-13 15:50:40,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4742729306487696 [2022-12-13 15:50:40,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2022-12-13 15:50:40,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2022-12-13 15:50:40,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:40,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2022-12-13 15:50:40,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:50:40,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 15:50:40,166 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 298.0) internal successors, (1192), 4 states have internal predecessors, (1192), 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 15:50:40,166 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 213 flow. Second operand 3 states and 424 transitions. [2022-12-13 15:50:40,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 472 flow [2022-12-13 15:50:40,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 465 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:50:40,171 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 218 flow [2022-12-13 15:50:40,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2022-12-13 15:50:40,172 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2022-12-13 15:50:40,172 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 218 flow [2022-12-13 15:50:40,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:50:40,173 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:40,173 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:40,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:50:40,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:50:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash -184835690, now seen corresponding path program 1 times [2022-12-13 15:50:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:40,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103442658] [2022-12-13 15:50:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:40,265 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 15:50:40,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103442658] [2022-12-13 15:50:40,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103442658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:50:40,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061629370] [2022-12-13 15:50:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:40,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:50:40,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:50:40,267 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:50:40,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:50:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:40,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:50:40,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:50:40,394 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 15:50:40,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:50:40,496 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 15:50:40,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061629370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:50:40,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:50:40,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-12-13 15:50:40,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457269522] [2022-12-13 15:50:40,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:50:40,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:50:40,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:40,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:50:40,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:50:40,722 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 298 [2022-12-13 15:50:40,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 218 flow. Second operand has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 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 15:50:40,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:40,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 298 [2022-12-13 15:50:40,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:44,832 INFO L130 PetriNetUnfolder]: 27773/42212 cut-off events. [2022-12-13 15:50:44,832 INFO L131 PetriNetUnfolder]: For 28254/28686 co-relation queries the response was YES. [2022-12-13 15:50:44,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111595 conditions, 42212 events. 27773/42212 cut-off events. For 28254/28686 co-relation queries the response was YES. Maximal size of possible extension queue 2789. Compared 341424 event pairs, 1684 based on Foata normal form. 1450/38475 useless extension candidates. Maximal degree in co-relation 106659. Up to 6761 conditions per place. [2022-12-13 15:50:45,059 INFO L137 encePairwiseOnDemand]: 278/298 looper letters, 561 selfloop transitions, 309 changer transitions 0/878 dead transitions. [2022-12-13 15:50:45,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 878 transitions, 5143 flow [2022-12-13 15:50:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 15:50:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-12-13 15:50:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 6751 transitions. [2022-12-13 15:50:45,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4274408003039129 [2022-12-13 15:50:45,076 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 6751 transitions. [2022-12-13 15:50:45,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 6751 transitions. [2022-12-13 15:50:45,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 6751 transitions. [2022-12-13 15:50:45,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 127.37735849056604) internal successors, (6751), 53 states have internal predecessors, (6751), 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 15:50:45,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 298.0) internal successors, (16092), 54 states have internal predecessors, (16092), 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 15:50:45,113 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 298.0) internal successors, (16092), 54 states have internal predecessors, (16092), 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 15:50:45,113 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 218 flow. Second operand 53 states and 6751 transitions. [2022-12-13 15:50:45,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 878 transitions, 5143 flow [2022-12-13 15:50:45,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 878 transitions, 5093 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:50:45,146 INFO L231 Difference]: Finished difference. Result has 147 places, 409 transitions, 3265 flow [2022-12-13 15:50:45,146 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3265, PETRI_PLACES=147, PETRI_TRANSITIONS=409} [2022-12-13 15:50:45,147 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2022-12-13 15:50:45,147 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 409 transitions, 3265 flow [2022-12-13 15:50:45,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 112.0) internal successors, (1344), 12 states have internal predecessors, (1344), 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 15:50:45,148 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:50:45,148 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:50:45,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:50:45,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 15:50:45,350 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:50:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:50:45,352 INFO L85 PathProgramCache]: Analyzing trace with hash 163084815, now seen corresponding path program 1 times [2022-12-13 15:50:45,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:50:45,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725586750] [2022-12-13 15:50:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:50:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:50:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:50:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:50:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:50:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725586750] [2022-12-13 15:50:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725586750] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:50:45,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:50:45,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:50:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174559330] [2022-12-13 15:50:45,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:50:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:50:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:50:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:50:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:50:45,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 298 [2022-12-13 15:50:45,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 409 transitions, 3265 flow. Second operand has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 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 15:50:45,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:50:45,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 298 [2022-12-13 15:50:45,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:50:56,751 INFO L130 PetriNetUnfolder]: 54698/81874 cut-off events. [2022-12-13 15:50:56,751 INFO L131 PetriNetUnfolder]: For 1276580/1277648 co-relation queries the response was YES. [2022-12-13 15:50:57,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371460 conditions, 81874 events. 54698/81874 cut-off events. For 1276580/1277648 co-relation queries the response was YES. Maximal size of possible extension queue 5611. Compared 703055 event pairs, 10953 based on Foata normal form. 230/72624 useless extension candidates. Maximal degree in co-relation 309384. Up to 39438 conditions per place. [2022-12-13 15:50:57,618 INFO L137 encePairwiseOnDemand]: 284/298 looper letters, 700 selfloop transitions, 200 changer transitions 0/917 dead transitions. [2022-12-13 15:50:57,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 917 transitions, 9227 flow [2022-12-13 15:50:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:50:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 15:50:57,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 943 transitions. [2022-12-13 15:50:57,621 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4520613614573346 [2022-12-13 15:50:57,621 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 943 transitions. [2022-12-13 15:50:57,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 943 transitions. [2022-12-13 15:50:57,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:50:57,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 943 transitions. [2022-12-13 15:50:57,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.71428571428572) internal successors, (943), 7 states have internal predecessors, (943), 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 15:50:57,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 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 15:50:57,625 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 298.0) internal successors, (2384), 8 states have internal predecessors, (2384), 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 15:50:57,626 INFO L175 Difference]: Start difference. First operand has 147 places, 409 transitions, 3265 flow. Second operand 7 states and 943 transitions. [2022-12-13 15:50:57,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 917 transitions, 9227 flow [2022-12-13 15:51:10,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 917 transitions, 8433 flow, removed 397 selfloop flow, removed 0 redundant places. [2022-12-13 15:51:10,826 INFO L231 Difference]: Finished difference. Result has 157 places, 601 transitions, 5375 flow [2022-12-13 15:51:10,826 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5375, PETRI_PLACES=157, PETRI_TRANSITIONS=601} [2022-12-13 15:51:10,827 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2022-12-13 15:51:10,827 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 601 transitions, 5375 flow [2022-12-13 15:51:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.0) internal successors, (570), 5 states have internal predecessors, (570), 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 15:51:10,827 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:51:10,827 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:51:10,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:51:10,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:51:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:51:10,828 INFO L85 PathProgramCache]: Analyzing trace with hash -290606908, now seen corresponding path program 2 times [2022-12-13 15:51:10,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:51:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694223075] [2022-12-13 15:51:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:51:10,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:51:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:51:10,956 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 15:51:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:51:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694223075] [2022-12-13 15:51:10,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694223075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:51:10,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545822335] [2022-12-13 15:51:10,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:51:10,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:51:10,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:51:10,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:51:10,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:51:11,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:51:11,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:51:11,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:51:11,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:51:11,074 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 15:51:11,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:51:11,183 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 15:51:11,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545822335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:51:11,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:51:11,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-12-13 15:51:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790794942] [2022-12-13 15:51:11,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:51:11,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 15:51:11,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:51:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 15:51:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-13 15:51:11,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 298 [2022-12-13 15:51:11,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 601 transitions, 5375 flow. Second operand has 18 states, 18 states have (on average 111.66666666666667) internal successors, (2010), 18 states have internal predecessors, (2010), 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 15:51:11,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:51:11,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 298 [2022-12-13 15:51:11,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:51:41,937 INFO L130 PetriNetUnfolder]: 109492/166138 cut-off events. [2022-12-13 15:51:41,937 INFO L131 PetriNetUnfolder]: For 7496820/7500980 co-relation queries the response was YES. [2022-12-13 15:51:43,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782435 conditions, 166138 events. 109492/166138 cut-off events. For 7496820/7500980 co-relation queries the response was YES. Maximal size of possible extension queue 7553. Compared 1525091 event pairs, 6542 based on Foata normal form. 12952/162104 useless extension candidates. Maximal degree in co-relation 769805. Up to 27229 conditions per place. [2022-12-13 15:51:43,923 INFO L137 encePairwiseOnDemand]: 278/298 looper letters, 1398 selfloop transitions, 1750 changer transitions 0/3160 dead transitions. [2022-12-13 15:51:43,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 3160 transitions, 38502 flow [2022-12-13 15:51:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-12-13 15:51:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-12-13 15:51:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 14223 transitions. [2022-12-13 15:51:43,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42237334442002733 [2022-12-13 15:51:43,940 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 14223 transitions. [2022-12-13 15:51:43,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 14223 transitions. [2022-12-13 15:51:43,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:51:43,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 14223 transitions. [2022-12-13 15:51:43,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 125.86725663716814) internal successors, (14223), 113 states have internal predecessors, (14223), 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 15:51:43,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 298.0) internal successors, (33972), 114 states have internal predecessors, (33972), 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 15:51:43,994 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 298.0) internal successors, (33972), 114 states have internal predecessors, (33972), 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 15:51:43,994 INFO L175 Difference]: Start difference. First operand has 157 places, 601 transitions, 5375 flow. Second operand 113 states and 14223 transitions. [2022-12-13 15:51:43,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 3160 transitions, 38502 flow [2022-12-13 15:52:28,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 3160 transitions, 38226 flow, removed 138 selfloop flow, removed 0 redundant places. [2022-12-13 15:52:28,924 INFO L231 Difference]: Finished difference. Result has 347 places, 2021 transitions, 28612 flow [2022-12-13 15:52:28,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=298, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=28612, PETRI_PLACES=347, PETRI_TRANSITIONS=2021} [2022-12-13 15:52:28,925 INFO L288 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2022-12-13 15:52:28,925 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 2021 transitions, 28612 flow [2022-12-13 15:52:28,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 111.66666666666667) internal successors, (2010), 18 states have internal predecessors, (2010), 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 15:52:28,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:52:28,926 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 15:52:28,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:52:29,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:52:29,128 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 15:52:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1795120246, now seen corresponding path program 1 times [2022-12-13 15:52:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:29,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984206381] [2022-12-13 15:52:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:52:29,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 15:52:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 15:52:29,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 15:52:29,187 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 15:52:29,187 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 15:52:29,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 15:52:29,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 15:52:29,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 15:52:29,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 15:52:29,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:52:29,188 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2022-12-13 15:52:29,188 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 15:52:29,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 15:52:29,209 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 15:52:29,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,237 INFO L130 PetriNetUnfolder]: 22/238 cut-off events. [2022-12-13 15:52:29,237 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:52:29,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-12-13 15:52:29,238 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,240 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 15:52:29,240 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,240 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 184 transitions, 400 flow [2022-12-13 15:52:29,262 INFO L130 PetriNetUnfolder]: 22/238 cut-off events. [2022-12-13 15:52:29,262 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 15:52:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 238 events. 22/238 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 639 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 198. Up to 10 conditions per place. [2022-12-13 15:52:29,268 INFO L119 LiptonReduction]: Number of co-enabled transitions 17424 [2022-12-13 15:52:31,802 INFO L134 LiptonReduction]: Checked pairs total: 32697 [2022-12-13 15:52:31,803 INFO L136 LiptonReduction]: Total number of compositions: 178 [2022-12-13 15:52:31,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:52:31,804 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;@69c1a565, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:52:31,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 15:52:31,806 INFO L130 PetriNetUnfolder]: 2/18 cut-off events. [2022-12-13 15:52:31,806 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 15:52:31,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:52:31,807 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:52:31,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:52:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1178792573, now seen corresponding path program 1 times [2022-12-13 15:52:31,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:31,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933863565] [2022-12-13 15:52:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:31,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:31,840 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 15:52:31,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:31,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933863565] [2022-12-13 15:52:31,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933863565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:52:31,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:52:31,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:52:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115462727] [2022-12-13 15:52:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:52:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:52:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:31,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:52:31,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:52:31,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 362 [2022-12-13 15:52:31,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 15:52:31,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:52:31,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 362 [2022-12-13 15:52:31,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:52:34,845 INFO L130 PetriNetUnfolder]: 41617/55325 cut-off events. [2022-12-13 15:52:34,845 INFO L131 PetriNetUnfolder]: For 8836/8836 co-relation queries the response was YES. [2022-12-13 15:52:34,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112820 conditions, 55325 events. 41617/55325 cut-off events. For 8836/8836 co-relation queries the response was YES. Maximal size of possible extension queue 2422. Compared 341811 event pairs, 18179 based on Foata normal form. 0/39085 useless extension candidates. Maximal degree in co-relation 12182. Up to 30678 conditions per place. [2022-12-13 15:52:35,119 INFO L137 encePairwiseOnDemand]: 357/362 looper letters, 70 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2022-12-13 15:52:35,119 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 81 transitions, 359 flow [2022-12-13 15:52:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:52:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:52:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-12-13 15:52:35,121 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4871086556169429 [2022-12-13 15:52:35,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-12-13 15:52:35,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-12-13 15:52:35,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:52:35,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-12-13 15:52:35,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 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 15:52:35,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 15:52:35,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 15:52:35,125 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 134 flow. Second operand 3 states and 529 transitions. [2022-12-13 15:52:35,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 81 transitions, 359 flow [2022-12-13 15:52:35,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 81 transitions, 341 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 15:52:35,132 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 130 flow [2022-12-13 15:52:35,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2022-12-13 15:52:35,133 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2022-12-13 15:52:35,133 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 130 flow [2022-12-13 15:52:35,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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 15:52:35,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:52:35,133 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:52:35,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:52:35,133 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:52:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:35,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1185065831, now seen corresponding path program 1 times [2022-12-13 15:52:35,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:35,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558312027] [2022-12-13 15:52:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:35,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:35,210 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 15:52:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558312027] [2022-12-13 15:52:35,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558312027] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:52:35,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:52:35,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:52:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180561066] [2022-12-13 15:52:35,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:52:35,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:52:35,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:35,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:52:35,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:52:35,290 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 362 [2022-12-13 15:52:35,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 138.66666666666666) internal successors, (832), 6 states have internal predecessors, (832), 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 15:52:35,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:52:35,291 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 362 [2022-12-13 15:52:35,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:52:41,766 INFO L130 PetriNetUnfolder]: 85370/113272 cut-off events. [2022-12-13 15:52:41,766 INFO L131 PetriNetUnfolder]: For 11251/11251 co-relation queries the response was YES. [2022-12-13 15:52:41,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235947 conditions, 113272 events. 85370/113272 cut-off events. For 11251/11251 co-relation queries the response was YES. Maximal size of possible extension queue 5306. Compared 761690 event pairs, 10023 based on Foata normal form. 0/83337 useless extension candidates. Maximal degree in co-relation 126016. Up to 47629 conditions per place. [2022-12-13 15:52:42,398 INFO L137 encePairwiseOnDemand]: 345/362 looper letters, 148 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2022-12-13 15:52:42,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 174 transitions, 783 flow [2022-12-13 15:52:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:52:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 15:52:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 995 transitions. [2022-12-13 15:52:42,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4581031307550645 [2022-12-13 15:52:42,400 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 995 transitions. [2022-12-13 15:52:42,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 995 transitions. [2022-12-13 15:52:42,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:52:42,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 995 transitions. [2022-12-13 15:52:42,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 165.83333333333334) internal successors, (995), 6 states have internal predecessors, (995), 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 15:52:42,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 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 15:52:42,403 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 362.0) internal successors, (2534), 7 states have internal predecessors, (2534), 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 15:52:42,403 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 130 flow. Second operand 6 states and 995 transitions. [2022-12-13 15:52:42,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 174 transitions, 783 flow [2022-12-13 15:52:42,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 174 transitions, 769 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:52:42,553 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 267 flow [2022-12-13 15:52:42,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2022-12-13 15:52:42,553 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2022-12-13 15:52:42,553 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 267 flow [2022-12-13 15:52:42,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 138.66666666666666) internal successors, (832), 6 states have internal predecessors, (832), 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 15:52:42,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:52:42,553 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:52:42,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:52:42,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:52:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:42,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1710995893, now seen corresponding path program 1 times [2022-12-13 15:52:42,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:42,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975614856] [2022-12-13 15:52:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:52:42,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975614856] [2022-12-13 15:52:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975614856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:52:42,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:52:42,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:52:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248765659] [2022-12-13 15:52:42,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:52:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:52:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:52:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:52:42,597 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 362 [2022-12-13 15:52:42,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 15:52:42,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:52:42,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 362 [2022-12-13 15:52:42,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:52:51,364 INFO L130 PetriNetUnfolder]: 109169/148204 cut-off events. [2022-12-13 15:52:51,365 INFO L131 PetriNetUnfolder]: For 87466/91601 co-relation queries the response was YES. [2022-12-13 15:52:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372993 conditions, 148204 events. 109169/148204 cut-off events. For 87466/91601 co-relation queries the response was YES. Maximal size of possible extension queue 6965. Compared 1080239 event pairs, 44813 based on Foata normal form. 1432/123541 useless extension candidates. Maximal degree in co-relation 150891. Up to 79040 conditions per place. [2022-12-13 15:52:52,231 INFO L137 encePairwiseOnDemand]: 358/362 looper letters, 90 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2022-12-13 15:52:52,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 103 transitions, 616 flow [2022-12-13 15:52:52,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:52:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 15:52:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 524 transitions. [2022-12-13 15:52:52,232 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48250460405156537 [2022-12-13 15:52:52,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 524 transitions. [2022-12-13 15:52:52,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 524 transitions. [2022-12-13 15:52:52,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:52:52,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 524 transitions. [2022-12-13 15:52:52,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 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 15:52:52,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 15:52:52,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 362.0) internal successors, (1448), 4 states have internal predecessors, (1448), 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 15:52:52,235 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 267 flow. Second operand 3 states and 524 transitions. [2022-12-13 15:52:52,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 103 transitions, 616 flow [2022-12-13 15:52:52,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 103 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 15:52:52,301 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 271 flow [2022-12-13 15:52:52,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2022-12-13 15:52:52,301 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 11 predicate places. [2022-12-13 15:52:52,301 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 271 flow [2022-12-13 15:52:52,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 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 15:52:52,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:52:52,302 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:52:52,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 15:52:52,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:52:52,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:52:52,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1917666947, now seen corresponding path program 1 times [2022-12-13 15:52:52,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:52:52,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109198892] [2022-12-13 15:52:52,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:52,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:52:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:52,372 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 15:52:52,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:52:52,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109198892] [2022-12-13 15:52:52,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109198892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:52:52,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748273471] [2022-12-13 15:52:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:52:52,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:52:52,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:52:52,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:52:52,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:52:52,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:52:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:52:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:52:52,486 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 15:52:52,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:52:52,545 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 15:52:52,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748273471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:52:52,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:52:52,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-12-13 15:52:52,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114185760] [2022-12-13 15:52:52,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:52:52,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:52:52,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:52:52,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:52:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:52:52,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 362 [2022-12-13 15:52:52,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 271 flow. Second operand has 16 states, 16 states have (on average 136.875) internal successors, (2190), 16 states have internal predecessors, (2190), 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 15:52:52,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:52:52,769 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 362 [2022-12-13 15:52:52,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 15:53:40,309 INFO L130 PetriNetUnfolder]: 471041/654303 cut-off events. [2022-12-13 15:53:40,309 INFO L131 PetriNetUnfolder]: For 475004/483472 co-relation queries the response was YES. [2022-12-13 15:53:41,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715964 conditions, 654303 events. 471041/654303 cut-off events. For 475004/483472 co-relation queries the response was YES. Maximal size of possible extension queue 31820. Compared 5733004 event pairs, 15783 based on Foata normal form. 23202/581247 useless extension candidates. Maximal degree in co-relation 1636693. Up to 121899 conditions per place. [2022-12-13 15:53:44,613 INFO L137 encePairwiseOnDemand]: 337/362 looper letters, 1268 selfloop transitions, 587 changer transitions 0/1865 dead transitions. [2022-12-13 15:53:44,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 1865 transitions, 10581 flow [2022-12-13 15:53:44,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 15:53:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-12-13 15:53:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 10920 transitions. [2022-12-13 15:53:44,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45705675539929685 [2022-12-13 15:53:44,622 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 10920 transitions. [2022-12-13 15:53:44,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 10920 transitions. [2022-12-13 15:53:44,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 15:53:44,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 10920 transitions. [2022-12-13 15:53:44,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 165.45454545454547) internal successors, (10920), 66 states have internal predecessors, (10920), 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 15:53:44,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 362.0) internal successors, (24254), 67 states have internal predecessors, (24254), 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 15:53:44,649 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 362.0) internal successors, (24254), 67 states have internal predecessors, (24254), 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 15:53:44,650 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 271 flow. Second operand 66 states and 10920 transitions. [2022-12-13 15:53:44,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 1865 transitions, 10581 flow [2022-12-13 15:53:45,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 1865 transitions, 10457 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 15:53:45,155 INFO L231 Difference]: Finished difference. Result has 186 places, 823 transitions, 6249 flow [2022-12-13 15:53:45,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=362, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=6249, PETRI_PLACES=186, PETRI_TRANSITIONS=823} [2022-12-13 15:53:45,156 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 134 predicate places. [2022-12-13 15:53:45,156 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 823 transitions, 6249 flow [2022-12-13 15:53:45,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 136.875) internal successors, (2190), 16 states have internal predecessors, (2190), 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 15:53:45,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 15:53:45,157 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:53:45,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 15:53:45,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c477fb49-69e4-4798-9424-39915cf68c22/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 15:53:45,358 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 15:53:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:53:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -628998887, now seen corresponding path program 1 times [2022-12-13 15:53:45,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:53:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458527091] [2022-12-13 15:53:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:53:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:53:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:53:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:53:45,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:53:45,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458527091] [2022-12-13 15:53:45,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458527091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:53:45,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:53:45,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:53:45,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734155950] [2022-12-13 15:53:45,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:53:45,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:53:45,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:53:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:53:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:53:45,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 362 [2022-12-13 15:53:45,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 823 transitions, 6249 flow. Second operand has 6 states, 6 states have (on average 138.83333333333334) internal successors, (833), 6 states have internal predecessors, (833), 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 15:53:45,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 15:53:45,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 362 [2022-12-13 15:53:45,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand