./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro --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 f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a --- 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-8393723 [2022-11-18 18:31:05,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:31:05,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:31:05,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:31:05,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:31:05,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:31:05,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:31:05,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:31:05,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:31:05,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:31:05,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:31:05,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:31:05,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:31:05,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:31:05,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:31:05,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:31:05,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:31:05,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:31:05,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:31:05,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:31:05,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:31:05,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:31:05,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:31:05,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:31:05,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:31:05,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:31:05,488 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:31:05,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:31:05,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:31:05,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:31:05,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:31:05,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:31:05,492 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:31:05,493 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:31:05,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:31:05,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:31:05,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:31:05,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:31:05,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:31:05,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:31:05,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:31:05,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 18:31:05,527 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:31:05,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:31:05,527 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:31:05,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:31:05,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:31:05,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:31:05,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:31:05,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:31:05,529 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:31:05,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:31:05,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:31:05,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:31:05,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 18:31:05,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:31:05,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:31:05,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:31:05,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:31:05,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:31:05,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:31:05,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:31:05,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:31:05,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:31:05,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:31:05,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f58af1aa15d4bec1241042c84c595fb9585ff7c461dd0b44f9fde0638838779a [2022-11-18 18:31:05,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:31:05,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:31:05,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:31:05,869 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:31:05,870 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:31:05,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-18 18:31:05,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/data/17db6b5c6/5d307f1a16b545ee8e8013f7c05feba8/FLAG5068de669 [2022-11-18 18:31:06,562 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:31:06,563 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/sv-benchmarks/c/pthread/queue_ok_longer.i [2022-11-18 18:31:06,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/data/17db6b5c6/5d307f1a16b545ee8e8013f7c05feba8/FLAG5068de669 [2022-11-18 18:31:06,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/data/17db6b5c6/5d307f1a16b545ee8e8013f7c05feba8 [2022-11-18 18:31:06,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:31:06,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:31:06,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:31:06,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:31:06,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:31:06,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8937416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:06, skipping insertion in model container [2022-11-18 18:31:06,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:31:06" (1/1) ... [2022-11-18 18:31:06,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:31:06,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:31:07,515 WARN L234 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_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-18 18:31:07,532 WARN L234 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_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-18 18:31:07,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:31:07,552 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:31:07,625 WARN L234 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_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/sv-benchmarks/c/pthread/queue_ok_longer.i[43272,43285] [2022-11-18 18:31:07,630 WARN L234 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_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/sv-benchmarks/c/pthread/queue_ok_longer.i[43545,43558] [2022-11-18 18:31:07,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:31:07,700 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:31:07,701 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07 WrapperNode [2022-11-18 18:31:07,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:31:07,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:07,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:31:07,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:31:07,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,799 INFO L138 Inliner]: procedures = 274, calls = 57, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 202 [2022-11-18 18:31:07,800 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:07,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:31:07,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:31:07,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:31:07,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:31:07,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:31:07,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:31:07,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:31:07,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (1/1) ... [2022-11-18 18:31:07,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:31:07,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:07,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:31:07,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:31:07,944 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 18:31:07,944 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 18:31:07,945 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 18:31:07,946 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 18:31:07,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 18:31:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 18:31:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 18:31:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 18:31:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 18:31:07,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 18:31:07,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 18:31:07,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:31:07,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:31:07,950 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 18:31:08,160 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:31:08,162 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:31:08,533 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:31:08,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:31:08,542 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 18:31:08,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:08 BoogieIcfgContainer [2022-11-18 18:31:08,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:31:08,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:31:08,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:31:08,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:31:08,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:31:06" (1/3) ... [2022-11-18 18:31:08,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3f0703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:08, skipping insertion in model container [2022-11-18 18:31:08,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:07" (2/3) ... [2022-11-18 18:31:08,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a3f0703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:08, skipping insertion in model container [2022-11-18 18:31:08,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:08" (3/3) ... [2022-11-18 18:31:08,554 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longer.i [2022-11-18 18:31:08,562 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 18:31:08,573 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:31:08,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 18:31:08,573 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 18:31:08,700 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 18:31:08,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 229 transitions, 474 flow [2022-11-18 18:31:08,908 INFO L130 PetriNetUnfolder]: 13/227 cut-off events. [2022-11-18 18:31:08,908 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:31:08,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 227 events. 13/227 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 367 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 146. Up to 3 conditions per place. [2022-11-18 18:31:08,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 229 transitions, 474 flow [2022-11-18 18:31:08,931 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 211 places, 217 transitions, 443 flow [2022-11-18 18:31:08,954 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:08,963 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;@2e81d85d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:08,964 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-18 18:31:08,986 INFO L130 PetriNetUnfolder]: 1/62 cut-off events. [2022-11-18 18:31:08,986 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 18:31:08,986 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:08,991 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:08,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash 57167261, now seen corresponding path program 1 times [2022-11-18 18:31:09,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:09,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522990246] [2022-11-18 18:31:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:09,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522990246] [2022-11-18 18:31:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522990246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:09,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:09,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 18:31:09,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759716808] [2022-11-18 18:31:09,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:09,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 18:31:09,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 18:31:09,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 18:31:09,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 229 [2022-11-18 18:31:09,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 217 transitions, 443 flow. Second operand has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:09,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:09,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 229 [2022-11-18 18:31:09,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:09,422 INFO L130 PetriNetUnfolder]: 9/208 cut-off events. [2022-11-18 18:31:09,423 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-18 18:31:09,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 208 events. 9/208 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 276 event pairs, 0 based on Foata normal form. 5/203 useless extension candidates. Maximal degree in co-relation 143. Up to 4 conditions per place. [2022-11-18 18:31:09,427 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 3 selfloop transitions, 0 changer transitions 0/208 dead transitions. [2022-11-18 18:31:09,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 208 transitions, 431 flow [2022-11-18 18:31:09,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 18:31:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 18:31:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 443 transitions. [2022-11-18 18:31:09,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9672489082969432 [2022-11-18 18:31:09,444 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 443 transitions. [2022-11-18 18:31:09,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 443 transitions. [2022-11-18 18:31:09,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:09,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 443 transitions. [2022-11-18 18:31:09,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 221.5) internal successors, (443), 2 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:09,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:09,467 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:09,469 INFO L175 Difference]: Start difference. First operand has 211 places, 217 transitions, 443 flow. Second operand 2 states and 443 transitions. [2022-11-18 18:31:09,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 208 transitions, 431 flow [2022-11-18 18:31:09,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 208 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 18:31:09,480 INFO L231 Difference]: Finished difference. Result has 204 places, 208 transitions, 420 flow [2022-11-18 18:31:09,482 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=420, PETRI_PLACES=204, PETRI_TRANSITIONS=208} [2022-11-18 18:31:09,489 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -7 predicate places. [2022-11-18 18:31:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 208 transitions, 420 flow [2022-11-18 18:31:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 218.5) internal successors, (437), 2 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:09,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:09,491 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:09,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:31:09,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1723295190, now seen corresponding path program 1 times [2022-11-18 18:31:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:09,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145150306] [2022-11-18 18:31:09,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:09,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:10,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:10,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145150306] [2022-11-18 18:31:10,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145150306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:10,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:10,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 18:31:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667429553] [2022-11-18 18:31:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 18:31:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:10,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 18:31:10,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 18:31:10,895 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 229 [2022-11-18 18:31:10,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 208 transitions, 420 flow. Second operand has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:10,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:10,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 229 [2022-11-18 18:31:10,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:12,144 INFO L130 PetriNetUnfolder]: 611/2580 cut-off events. [2022-11-18 18:31:12,145 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2022-11-18 18:31:12,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3512 conditions, 2580 events. 611/2580 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 20587 event pairs, 459 based on Foata normal form. 0/2409 useless extension candidates. Maximal degree in co-relation 3509. Up to 882 conditions per place. [2022-11-18 18:31:12,166 INFO L137 encePairwiseOnDemand]: 216/229 looper letters, 42 selfloop transitions, 12 changer transitions 0/204 dead transitions. [2022-11-18 18:31:12,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 204 transitions, 520 flow [2022-11-18 18:31:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 18:31:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 18:31:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2187 transitions. [2022-11-18 18:31:12,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7346321800470272 [2022-11-18 18:31:12,177 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2187 transitions. [2022-11-18 18:31:12,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2187 transitions. [2022-11-18 18:31:12,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:12,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2187 transitions. [2022-11-18 18:31:12,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.23076923076923) internal successors, (2187), 13 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,195 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 229.0) internal successors, (3206), 14 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,195 INFO L175 Difference]: Start difference. First operand has 204 places, 208 transitions, 420 flow. Second operand 13 states and 2187 transitions. [2022-11-18 18:31:12,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 204 transitions, 520 flow [2022-11-18 18:31:12,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 204 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 18:31:12,206 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 436 flow [2022-11-18 18:31:12,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=436, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-18 18:31:12,207 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 2 predicate places. [2022-11-18 18:31:12,208 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 436 flow [2022-11-18 18:31:12,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 167.25) internal successors, (2007), 12 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,209 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:12,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:31:12,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:12,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1553437092, now seen corresponding path program 1 times [2022-11-18 18:31:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:12,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392272661] [2022-11-18 18:31:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:12,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392272661] [2022-11-18 18:31:12,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392272661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:12,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:12,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296304300] [2022-11-18 18:31:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:12,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:12,453 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 229 [2022-11-18 18:31:12,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 436 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:12,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 229 [2022-11-18 18:31:12,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:12,513 INFO L130 PetriNetUnfolder]: 16/305 cut-off events. [2022-11-18 18:31:12,514 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 18:31:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 305 events. 16/305 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 688 event pairs, 2 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 344. Up to 12 conditions per place. [2022-11-18 18:31:12,515 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 7 selfloop transitions, 2 changer transitions 5/207 dead transitions. [2022-11-18 18:31:12,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 207 transitions, 469 flow [2022-11-18 18:31:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-18 18:31:12,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-18 18:31:12,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:12,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,524 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 436 flow. Second operand 3 states and 649 transitions. [2022-11-18 18:31:12,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 207 transitions, 469 flow [2022-11-18 18:31:12,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 207 transitions, 446 flow, removed 0 selfloop flow, removed 11 redundant places. [2022-11-18 18:31:12,528 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 415 flow [2022-11-18 18:31:12,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=415, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-18 18:31:12,531 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-18 18:31:12,532 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 415 flow [2022-11-18 18:31:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:12,533 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:12,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 18:31:12,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:12,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:12,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1135869843, now seen corresponding path program 1 times [2022-11-18 18:31:12,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:12,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343459878] [2022-11-18 18:31:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:12,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343459878] [2022-11-18 18:31:12,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343459878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:12,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:12,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:12,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970674711] [2022-11-18 18:31:12,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:12,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 229 [2022-11-18 18:31:12,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:12,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 229 [2022-11-18 18:31:12,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:12,753 INFO L130 PetriNetUnfolder]: 20/334 cut-off events. [2022-11-18 18:31:12,753 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 18:31:12,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 334 events. 20/334 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 6 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 399. Up to 24 conditions per place. [2022-11-18 18:31:12,755 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 13 selfloop transitions, 2 changer transitions 1/206 dead transitions. [2022-11-18 18:31:12,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 206 transitions, 457 flow [2022-11-18 18:31:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 649 transitions. [2022-11-18 18:31:12,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9446870451237264 [2022-11-18 18:31:12,759 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:12,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 649 transitions. [2022-11-18 18:31:12,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.33333333333334) internal successors, (649), 3 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,769 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,769 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 415 flow. Second operand 3 states and 649 transitions. [2022-11-18 18:31:12,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 206 transitions, 457 flow [2022-11-18 18:31:12,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 206 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 18:31:12,773 INFO L231 Difference]: Finished difference. Result has 205 places, 201 transitions, 421 flow [2022-11-18 18:31:12,774 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=421, PETRI_PLACES=205, PETRI_TRANSITIONS=201} [2022-11-18 18:31:12,778 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, -6 predicate places. [2022-11-18 18:31:12,778 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 201 transitions, 421 flow [2022-11-18 18:31:12,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:12,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:12,779 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:12,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 18:31:12,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:12,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1252901689, now seen corresponding path program 1 times [2022-11-18 18:31:12,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:12,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020214796] [2022-11-18 18:31:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:12,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:12,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:12,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020214796] [2022-11-18 18:31:12,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020214796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:12,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104735534] [2022-11-18 18:31:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:12,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:12,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:12,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:12,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:31:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:13,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 18:31:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:13,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:13,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104735534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:13,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:13,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 18:31:13,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293396222] [2022-11-18 18:31:13,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:13,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:31:13,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:13,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:31:13,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:31:13,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:31:13,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 201 transitions, 421 flow. Second operand has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:13,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:13,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:31:13,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:13,585 INFO L130 PetriNetUnfolder]: 30/421 cut-off events. [2022-11-18 18:31:13,585 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-18 18:31:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 541 conditions, 421 events. 30/421 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 693 event pairs, 4 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 535. Up to 19 conditions per place. [2022-11-18 18:31:13,588 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 20 selfloop transitions, 9 changer transitions 0/218 dead transitions. [2022-11-18 18:31:13,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 218 transitions, 529 flow [2022-11-18 18:31:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:31:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 18:31:13,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1921 transitions. [2022-11-18 18:31:13,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9320718098010674 [2022-11-18 18:31:13,594 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1921 transitions. [2022-11-18 18:31:13,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1921 transitions. [2022-11-18 18:31:13,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:13,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1921 transitions. [2022-11-18 18:31:13,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 213.44444444444446) internal successors, (1921), 9 states have internal predecessors, (1921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:13,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:13,607 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 229.0) internal successors, (2290), 10 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:13,607 INFO L175 Difference]: Start difference. First operand has 205 places, 201 transitions, 421 flow. Second operand 9 states and 1921 transitions. [2022-11-18 18:31:13,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 218 transitions, 529 flow [2022-11-18 18:31:13,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 218 transitions, 527 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:13,613 INFO L231 Difference]: Finished difference. Result has 214 places, 207 transitions, 469 flow [2022-11-18 18:31:13,614 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=214, PETRI_TRANSITIONS=207} [2022-11-18 18:31:13,616 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 3 predicate places. [2022-11-18 18:31:13,617 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 207 transitions, 469 flow [2022-11-18 18:31:13,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 212.2) internal successors, (2122), 10 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:13,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:13,621 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:13,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:13,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:13,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -185463623, now seen corresponding path program 2 times [2022-11-18 18:31:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139076320] [2022-11-18 18:31:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-18 18:31:14,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:14,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139076320] [2022-11-18 18:31:14,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139076320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:14,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:14,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 18:31:14,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208118178] [2022-11-18 18:31:14,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:14,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 18:31:14,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:14,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 18:31:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 18:31:14,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 229 [2022-11-18 18:31:14,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 207 transitions, 469 flow. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:14,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:14,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 229 [2022-11-18 18:31:14,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:14,213 INFO L130 PetriNetUnfolder]: 25/609 cut-off events. [2022-11-18 18:31:14,213 INFO L131 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2022-11-18 18:31:14,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 609 events. 25/609 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 1303 event pairs, 3 based on Foata normal form. 2/594 useless extension candidates. Maximal degree in co-relation 723. Up to 19 conditions per place. [2022-11-18 18:31:14,216 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 12 selfloop transitions, 3 changer transitions 3/209 dead transitions. [2022-11-18 18:31:14,216 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 209 transitions, 508 flow [2022-11-18 18:31:14,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 18:31:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 18:31:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 639 transitions. [2022-11-18 18:31:14,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9301310043668122 [2022-11-18 18:31:14,219 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 639 transitions. [2022-11-18 18:31:14,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 639 transitions. [2022-11-18 18:31:14,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:14,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 639 transitions. [2022-11-18 18:31:14,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.0) internal successors, (639), 3 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:14,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:14,223 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:14,223 INFO L175 Difference]: Start difference. First operand has 214 places, 207 transitions, 469 flow. Second operand 3 states and 639 transitions. [2022-11-18 18:31:14,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 209 transitions, 508 flow [2022-11-18 18:31:14,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 209 transitions, 502 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:14,230 INFO L231 Difference]: Finished difference. Result has 215 places, 204 transitions, 463 flow [2022-11-18 18:31:14,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=463, PETRI_PLACES=215, PETRI_TRANSITIONS=204} [2022-11-18 18:31:14,234 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 4 predicate places. [2022-11-18 18:31:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 204 transitions, 463 flow [2022-11-18 18:31:14,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:14,235 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:14,235 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:14,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 18:31:14,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:14,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1279925599, now seen corresponding path program 1 times [2022-11-18 18:31:14,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:14,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779033083] [2022-11-18 18:31:14,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:14,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779033083] [2022-11-18 18:31:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779033083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729801314] [2022-11-18 18:31:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:14,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:14,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:14,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:31:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:14,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 18:31:14,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:14,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729801314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:15,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:15,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-18 18:31:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510744589] [2022-11-18 18:31:15,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 18:31:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 18:31:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-18 18:31:15,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:31:15,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 204 transitions, 463 flow. Second operand has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:15,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:15,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:31:15,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:15,607 INFO L130 PetriNetUnfolder]: 58/745 cut-off events. [2022-11-18 18:31:15,607 INFO L131 PetriNetUnfolder]: For 37/37 co-relation queries the response was YES. [2022-11-18 18:31:15,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 745 events. 58/745 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 1394 event pairs, 4 based on Foata normal form. 8/734 useless extension candidates. Maximal degree in co-relation 1045. Up to 39 conditions per place. [2022-11-18 18:31:15,613 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 40 selfloop transitions, 21 changer transitions 1/247 dead transitions. [2022-11-18 18:31:15,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 247 transitions, 761 flow [2022-11-18 18:31:15,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 18:31:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 18:31:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4475 transitions. [2022-11-18 18:31:15,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9305468912455812 [2022-11-18 18:31:15,623 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4475 transitions. [2022-11-18 18:31:15,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4475 transitions. [2022-11-18 18:31:15,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:15,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4475 transitions. [2022-11-18 18:31:15,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 213.0952380952381) internal successors, (4475), 21 states have internal predecessors, (4475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:15,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:15,649 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 229.0) internal successors, (5038), 22 states have internal predecessors, (5038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:15,649 INFO L175 Difference]: Start difference. First operand has 215 places, 204 transitions, 463 flow. Second operand 21 states and 4475 transitions. [2022-11-18 18:31:15,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 247 transitions, 761 flow [2022-11-18 18:31:15,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 247 transitions, 758 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 18:31:15,658 INFO L231 Difference]: Finished difference. Result has 236 places, 216 transitions, 588 flow [2022-11-18 18:31:15,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=460, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=588, PETRI_PLACES=236, PETRI_TRANSITIONS=216} [2022-11-18 18:31:15,659 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 25 predicate places. [2022-11-18 18:31:15,660 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 216 transitions, 588 flow [2022-11-18 18:31:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 212.33333333333334) internal successors, (3822), 18 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:15,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:15,662 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:15,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:15,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1142080485, now seen corresponding path program 2 times [2022-11-18 18:31:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:15,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684545895] [2022-11-18 18:31:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:16,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684545895] [2022-11-18 18:31:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684545895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:16,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606092131] [2022-11-18 18:31:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:31:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:16,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:16,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:31:17,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:31:17,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:31:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 0 proven. 658 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606092131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:18,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-18 18:31:18,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83914102] [2022-11-18 18:31:18,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:18,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 18:31:18,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:18,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 18:31:18,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 18:31:18,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:31:18,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 216 transitions, 588 flow. Second operand has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:18,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:18,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:31:18,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:19,289 INFO L130 PetriNetUnfolder]: 114/1391 cut-off events. [2022-11-18 18:31:19,289 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-11-18 18:31:19,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2167 conditions, 1391 events. 114/1391 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 2838 event pairs, 4 based on Foata normal form. 16/1372 useless extension candidates. Maximal degree in co-relation 2153. Up to 79 conditions per place. [2022-11-18 18:31:19,298 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 80 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2022-11-18 18:31:19,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 310 transitions, 1326 flow [2022-11-18 18:31:19,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 18:31:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 18:31:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 9583 transitions. [2022-11-18 18:31:19,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9299369238233867 [2022-11-18 18:31:19,316 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 9583 transitions. [2022-11-18 18:31:19,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 9583 transitions. [2022-11-18 18:31:19,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:19,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 9583 transitions. [2022-11-18 18:31:19,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 212.95555555555555) internal successors, (9583), 45 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:19,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:19,392 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 229.0) internal successors, (10534), 46 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:19,392 INFO L175 Difference]: Start difference. First operand has 236 places, 216 transitions, 588 flow. Second operand 45 states and 9583 transitions. [2022-11-18 18:31:19,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 310 transitions, 1326 flow [2022-11-18 18:31:19,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 310 transitions, 1286 flow, removed 14 selfloop flow, removed 6 redundant places. [2022-11-18 18:31:19,407 INFO L231 Difference]: Finished difference. Result has 282 places, 241 transitions, 866 flow [2022-11-18 18:31:19,407 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=866, PETRI_PLACES=282, PETRI_TRANSITIONS=241} [2022-11-18 18:31:19,410 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 71 predicate places. [2022-11-18 18:31:19,410 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 241 transitions, 866 flow [2022-11-18 18:31:19,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 212.41176470588235) internal successors, (7222), 34 states have internal predecessors, (7222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:19,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:19,413 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:19,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 18:31:19,624 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:19,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1778850809, now seen corresponding path program 3 times [2022-11-18 18:31:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861587014] [2022-11-18 18:31:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:19,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 0 proven. 3270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:22,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861587014] [2022-11-18 18:31:22,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861587014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:22,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745773706] [2022-11-18 18:31:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:31:22,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:22,335 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:22,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:31:22,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 18:31:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:31:22,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 18:31:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:26,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:31:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:31:26,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:31:26,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:31:26,626 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:31:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 27 [2022-11-18 18:31:26,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:31:26,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-18 18:31:26,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 18:31:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 455 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 0 not checked. [2022-11-18 18:31:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:27,135 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_775 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_775) |c_~#queue~0.base|) (+ |c_~#queue~0.offset| 1604)) 400)) is different from false [2022-11-18 18:31:27,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:31:27,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 18:31:27,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:31:27,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-11-18 18:31:27,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-18 18:31:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3270 backedges. 377 proven. 319 refuted. 0 times theorem prover too weak. 2496 trivial. 78 not checked. [2022-11-18 18:31:28,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745773706] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:28,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:28,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14, 12] total 55 [2022-11-18 18:31:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224106184] [2022-11-18 18:31:28,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:28,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 18:31:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 18:31:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2489, Unknown=1, NotChecked=104, Total=2970 [2022-11-18 18:31:28,269 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 229 [2022-11-18 18:31:28,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 241 transitions, 866 flow. Second operand has 55 states, 55 states have (on average 164.74545454545455) internal successors, (9061), 55 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:28,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:28,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 229 [2022-11-18 18:31:28,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:31:47,418 INFO L130 PetriNetUnfolder]: 2125/7556 cut-off events. [2022-11-18 18:31:47,418 INFO L131 PetriNetUnfolder]: For 2828/2828 co-relation queries the response was YES. [2022-11-18 18:31:47,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15817 conditions, 7556 events. 2125/7556 cut-off events. For 2828/2828 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 40106 event pairs, 31 based on Foata normal form. 8/7464 useless extension candidates. Maximal degree in co-relation 15794. Up to 687 conditions per place. [2022-11-18 18:31:47,486 INFO L137 encePairwiseOnDemand]: 206/229 looper letters, 871 selfloop transitions, 374 changer transitions 0/1377 dead transitions. [2022-11-18 18:31:47,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1377 transitions, 6630 flow [2022-11-18 18:31:47,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-11-18 18:31:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2022-11-18 18:31:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 30167 transitions. [2022-11-18 18:31:47,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7159436111638504 [2022-11-18 18:31:47,531 INFO L72 ComplementDD]: Start complementDD. Operand 184 states and 30167 transitions. [2022-11-18 18:31:47,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 184 states and 30167 transitions. [2022-11-18 18:31:47,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:31:47,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 184 states and 30167 transitions. [2022-11-18 18:31:47,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 185 states, 184 states have (on average 163.95108695652175) internal successors, (30167), 184 states have internal predecessors, (30167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 185 states, 185 states have (on average 229.0) internal successors, (42365), 185 states have internal predecessors, (42365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,667 INFO L81 ComplementDD]: Finished complementDD. Result has 185 states, 185 states have (on average 229.0) internal successors, (42365), 185 states have internal predecessors, (42365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,667 INFO L175 Difference]: Start difference. First operand has 282 places, 241 transitions, 866 flow. Second operand 184 states and 30167 transitions. [2022-11-18 18:31:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1377 transitions, 6630 flow [2022-11-18 18:31:47,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1377 transitions, 6515 flow, removed 22 selfloop flow, removed 18 redundant places. [2022-11-18 18:31:47,702 INFO L231 Difference]: Finished difference. Result has 516 places, 646 transitions, 3382 flow [2022-11-18 18:31:47,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=184, PETRI_FLOW=3382, PETRI_PLACES=516, PETRI_TRANSITIONS=646} [2022-11-18 18:31:47,703 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 305 predicate places. [2022-11-18 18:31:47,703 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 646 transitions, 3382 flow [2022-11-18 18:31:47,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 164.74545454545455) internal successors, (9061), 55 states have internal predecessors, (9061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:47,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:31:47,707 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:47,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 18:31:47,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:47,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:31:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash -426103930, now seen corresponding path program 1 times [2022-11-18 18:31:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:47,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873176397] [2022-11-18 18:31:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:47,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:50,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873176397] [2022-11-18 18:31:50,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873176397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:31:50,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075971549] [2022-11-18 18:31:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:50,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:31:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:50,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:31:50,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:31:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 18:31:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:31:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:51,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:31:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 0 proven. 3694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:54,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075971549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:31:54,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:31:54,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 70 [2022-11-18 18:31:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812620438] [2022-11-18 18:31:54,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:31:54,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-18 18:31:54,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-18 18:31:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2022-11-18 18:31:54,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:31:54,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 646 transitions, 3382 flow. Second operand has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:31:54,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:31:54,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:02,328 INFO L130 PetriNetUnfolder]: 927/8253 cut-off events. [2022-11-18 18:32:02,328 INFO L131 PetriNetUnfolder]: For 115970/115970 co-relation queries the response was YES. [2022-11-18 18:32:02,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26430 conditions, 8253 events. 927/8253 cut-off events. For 115970/115970 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 37336 event pairs, 7 based on Foata normal form. 102/8347 useless extension candidates. Maximal degree in co-relation 26337. Up to 590 conditions per place. [2022-11-18 18:32:02,437 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 170 selfloop transitions, 162 changer transitions 0/871 dead transitions. [2022-11-18 18:32:02,437 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 871 transitions, 5718 flow [2022-11-18 18:32:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-18 18:32:02,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-18 18:32:02,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 21076 transitions. [2022-11-18 18:32:02,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9296458030082484 [2022-11-18 18:32:02,465 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 21076 transitions. [2022-11-18 18:32:02,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 21076 transitions. [2022-11-18 18:32:02,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:02,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 21076 transitions. [2022-11-18 18:32:02,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 212.88888888888889) internal successors, (21076), 99 states have internal predecessors, (21076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:02,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:02,568 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 229.0) internal successors, (22900), 100 states have internal predecessors, (22900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:02,569 INFO L175 Difference]: Start difference. First operand has 516 places, 646 transitions, 3382 flow. Second operand 99 states and 21076 transitions. [2022-11-18 18:32:02,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 871 transitions, 5718 flow [2022-11-18 18:32:02,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 871 transitions, 5532 flow, removed 4 selfloop flow, removed 48 redundant places. [2022-11-18 18:32:02,968 INFO L231 Difference]: Finished difference. Result has 584 places, 713 transitions, 4466 flow [2022-11-18 18:32:02,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=4466, PETRI_PLACES=584, PETRI_TRANSITIONS=713} [2022-11-18 18:32:02,970 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 373 predicate places. [2022-11-18 18:32:02,971 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 713 transitions, 4466 flow [2022-11-18 18:32:02,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 212.4857142857143) internal successors, (14874), 70 states have internal predecessors, (14874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:02,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:02,974 INFO L209 CegarLoopForPetriNet]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:02,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:03,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:03,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:32:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1076181397, now seen corresponding path program 2 times [2022-11-18 18:32:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443795050] [2022-11-18 18:32:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:03,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:12,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443795050] [2022-11-18 18:32:12,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443795050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:32:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335768537] [2022-11-18 18:32:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 18:32:12,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:12,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:12,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:32:12,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 18:32:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:32:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 2505 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 18:32:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:14,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:32:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16337 backedges. 0 proven. 16337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:20,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335768537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:32:20,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:32:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 138 [2022-11-18 18:32:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624392653] [2022-11-18 18:32:20,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:32:20,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-11-18 18:32:20,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:20,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-11-18 18:32:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14076, Unknown=0, NotChecked=0, Total=18906 [2022-11-18 18:32:20,108 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 229 [2022-11-18 18:32:20,129 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 713 transitions, 4466 flow. Second operand has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:20,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:32:20,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 229 [2022-11-18 18:32:20,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 18:32:48,298 INFO L130 PetriNetUnfolder]: 1811/16515 cut-off events. [2022-11-18 18:32:48,298 INFO L131 PetriNetUnfolder]: For 328975/328975 co-relation queries the response was YES. [2022-11-18 18:32:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55495 conditions, 16515 events. 1811/16515 cut-off events. For 328975/328975 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 75549 event pairs, 7 based on Foata normal form. 204/16711 useless extension candidates. Maximal degree in co-relation 55385. Up to 1474 conditions per place. [2022-11-18 18:32:48,486 INFO L137 encePairwiseOnDemand]: 223/229 looper letters, 340 selfloop transitions, 298 changer transitions 0/1177 dead transitions. [2022-11-18 18:32:48,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 784 places, 1177 transitions, 9846 flow [2022-11-18 18:32:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-11-18 18:32:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2022-11-18 18:32:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 42785 transitions. [2022-11-18 18:32:48,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.929522692215777 [2022-11-18 18:32:48,523 INFO L72 ComplementDD]: Start complementDD. Operand 201 states and 42785 transitions. [2022-11-18 18:32:48,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 201 states and 42785 transitions. [2022-11-18 18:32:48,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 18:32:48,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 201 states and 42785 transitions. [2022-11-18 18:32:48,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 202 states, 201 states have (on average 212.86069651741295) internal successors, (42785), 201 states have internal predecessors, (42785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:48,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:48,651 INFO L81 ComplementDD]: Finished complementDD. Result has 202 states, 202 states have (on average 229.0) internal successors, (46258), 202 states have internal predecessors, (46258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:48,652 INFO L175 Difference]: Start difference. First operand has 584 places, 713 transitions, 4466 flow. Second operand 201 states and 42785 transitions. [2022-11-18 18:32:48,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 784 places, 1177 transitions, 9846 flow [2022-11-18 18:32:49,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 1177 transitions, 9236 flow, removed 208 selfloop flow, removed 48 redundant places. [2022-11-18 18:32:49,633 INFO L231 Difference]: Finished difference. Result has 771 places, 850 transitions, 6794 flow [2022-11-18 18:32:49,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=201, PETRI_FLOW=6794, PETRI_PLACES=771, PETRI_TRANSITIONS=850} [2022-11-18 18:32:49,634 INFO L288 CegarLoopForPetriNet]: 211 programPoint places, 560 predicate places. [2022-11-18 18:32:49,635 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 850 transitions, 6794 flow [2022-11-18 18:32:49,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 212.47826086956522) internal successors, (29322), 138 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:49,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 18:32:49,638 INFO L209 CegarLoopForPetriNet]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:49,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:49,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:32:49,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-18 18:32:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1623998944, now seen corresponding path program 3 times [2022-11-18 18:32:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983708423] [2022-11-18 18:32:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:49,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983708423] [2022-11-18 18:33:30,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983708423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 18:33:30,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158064557] [2022-11-18 18:33:30,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 18:33:30,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:30,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:30,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afbc40dd-581c-4eb1-a09d-7cf200db2b5f/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:33:30,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 18:33:30,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 18:33:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 18:33:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:50,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 18:33:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:50,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:33:51,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:33:51,387 INFO L321 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-11-18 18:33:51,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 27 [2022-11-18 18:33:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:51,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 18:33:52,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2022-11-18 18:33:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:52,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 18:33:52,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 18:33:52,883 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-18 18:33:52,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 27 [2022-11-18 18:33:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 18:33:52,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-18 18:33:53,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-18 18:33:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 4139 proven. 1521 refuted. 0 times theorem prover too weak. 62816 trivial. 0 not checked. [2022-11-18 18:33:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 18:33:53,975 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int)) (not (= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse1))))) is different from false [2022-11-18 18:33:54,038 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2811 Int)) (or (not (<= v_ArrVal_2811 (+ 1 |c_t1Thread1of1ForFork0_enqueue_#t~post41#1|))) (not (= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse1)))))) is different from false [2022-11-18 18:33:54,056 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2811 Int)) (or (not (= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604) v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse1)))) (< (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1) v_ArrVal_2811))) is different from false [2022-11-18 18:33:55,343 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2809 Int) (v_ArrVal_2811 Int)) (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (not (= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse1)))) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2811)))) is different from false [2022-11-18 18:33:55,410 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (v_ArrVal_2811 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807)) (.cse3 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (not (= 400 (let ((.cse1 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse0 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse2 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse3 v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse0 (+ (* (select .cse0 .cse1) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse1)))) (< (+ (select .cse2 .cse3) 1) v_ArrVal_2811)))) is different from false [2022-11-18 18:33:55,452 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int)) (let ((.cse4 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse1 (+ |c_t1Thread1of1ForFork0_enqueue_~q#1.offset| 1604))) (or (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (v_ArrVal_2809 Int) (v_ArrVal_2811 Int)) (let ((.cse0 (store .cse4 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2807))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2811) (not (= 400 (let ((.cse3 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) v_ArrVal_2809) .cse1 v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse2 (+ (* (select .cse2 .cse3) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse3))))))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse4 .cse1)))))) is different from false [2022-11-18 18:33:55,508 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2813 (Array Int Int)) (v_ArrVal_2815 Int) (v_ArrVal_2807 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| Int) (v_ArrVal_2809 Int) (v_ArrVal_2811 Int)) (let ((.cse4 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base|))) (let ((.cse0 (store .cse4 (+ (* |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| 4) |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2807)) (.cse1 (+ |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset| 1604))) (or (< (+ (select .cse0 .cse1) 1) v_ArrVal_2811) (not (= 400 (let ((.cse3 (+ |c_~#queue~0.offset| 1604))) (select (let ((.cse2 (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_#in~q#1.base| (store (store .cse0 (+ 1608 |c_t1Thread1of1ForFork0_enqueue_#in~q#1.offset|) v_ArrVal_2809) .cse1 v_ArrVal_2811)) |c_~#stored_elements~0.base| v_ArrVal_2813) |c_~#queue~0.base|))) (store .cse2 (+ (* (select .cse2 .cse3) 4) |c_~#queue~0.offset|) v_ArrVal_2815)) .cse3)))) (not (<= |v_t1Thread1of1ForFork0_enqueue_#t~mem36#1_241| (select .cse4 .cse1))))))) is different from false [2022-11-18 18:34:00,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:00,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 130 [2022-11-18 18:34:00,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:00,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 216 [2022-11-18 18:34:00,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 173 [2022-11-18 18:34:00,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2022-11-18 18:34:00,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-18 18:34:01,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 18:34:01,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-11-18 18:34:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 68476 backedges. 2071 proven. 1509 refuted. 902 times theorem prover too weak. 62816 trivial. 1178 not checked. [2022-11-18 18:34:12,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158064557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 18:34:12,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 18:34:12,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 20, 22] total 175 [2022-11-18 18:34:12,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378306309] [2022-11-18 18:34:12,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 18:34:12,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-11-18 18:34:12,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-11-18 18:34:12,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4991, Invalid=23074, Unknown=19, NotChecked=2366, Total=30450 [2022-11-18 18:34:12,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 229 [2022-11-18 18:34:12,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 850 transitions, 6794 flow. Second operand has 175 states, 175 states have (on average 162.56) internal successors, (28448), 175 states have internal predecessors, (28448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:12,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 18:34:12,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 229 [2022-11-18 18:34:12,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand