./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS --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 ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a --- 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-4e7fbc6 [2022-11-23 03:03:32,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:03:32,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:03:32,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:03:32,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:03:32,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:03:32,729 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:03:32,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:03:32,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:03:32,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:03:32,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:03:32,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:03:32,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:03:32,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:03:32,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:03:32,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:03:32,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:03:32,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:03:32,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:03:32,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:03:32,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:03:32,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:03:32,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:03:32,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:03:32,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:03:32,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:03:32,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:03:32,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:03:32,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:03:32,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:03:32,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:03:32,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:03:32,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:03:32,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:03:32,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:03:32,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:03:32,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:03:32,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:03:32,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:03:32,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:03:32,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:03:32,810 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:03:32,848 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:03:32,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:03:32,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:03:32,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:03:32,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:03:32,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:03:32,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:03:32,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:03:32,852 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:03:32,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:03:32,853 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:03:32,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:03:32,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:03:32,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:03:32,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:03:32,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:03:32,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:03:32,855 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:03:32,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:03:32,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:03:32,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:03:32,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:03:32,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:03:32,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:03:32,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:32,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:03:32,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:03:32,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:03:32,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:03:32,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:03:32,859 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:03:32,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:03:32,859 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:03:32,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:03:32,861 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecda181bd3fe1882667151a04232fb9d04292dd6ca3491d98fdc8de5d539856a [2022-11-23 03:03:33,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:03:33,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:03:33,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:03:33,263 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:03:33,264 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:03:33,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 03:03:36,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:03:37,243 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:03:37,244 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2022-11-23 03:03:37,254 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/data/6710ef609/2035c94976a14eb5a2b0170de5b5e78d/FLAG5fdceaef3 [2022-11-23 03:03:37,272 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/data/6710ef609/2035c94976a14eb5a2b0170de5b5e78d [2022-11-23 03:03:37,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:03:37,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:03:37,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:37,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:03:37,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:03:37,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656bc65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37, skipping insertion in model container [2022-11-23 03:03:37,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:03:37,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:03:37,538 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 03:03:37,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:37,572 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:03:37,602 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c[2924,2937] [2022-11-23 03:03:37,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:03:37,622 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:03:37,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37 WrapperNode [2022-11-23 03:03:37,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:03:37,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:37,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:03:37,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:03:37,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,673 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 191 [2022-11-23 03:03:37,674 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:03:37,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:03:37,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:03:37,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:03:37,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:03:37,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:03:37,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:03:37,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:03:37,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (1/1) ... [2022-11-23 03:03:37,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:03:37,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:37,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:03:37,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:03:37,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:03:37,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 03:03:37,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 03:03:37,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 03:03:37,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 03:03:37,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:03:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:03:37,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:03:37,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 03:03:37,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 03:03:37,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:03:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:03:37,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:03:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:03:37,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:03:37,833 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:03:37,962 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:03:37,964 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:03:38,619 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:03:38,723 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:03:38,723 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 03:03:38,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:38 BoogieIcfgContainer [2022-11-23 03:03:38,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:03:38,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:03:38,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:03:38,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:03:38,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:37" (1/3) ... [2022-11-23 03:03:38,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11377974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:38, skipping insertion in model container [2022-11-23 03:03:38,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:37" (2/3) ... [2022-11-23 03:03:38,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11377974 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:38, skipping insertion in model container [2022-11-23 03:03:38,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:38" (3/3) ... [2022-11-23 03:03:38,737 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2022-11-23 03:03:38,748 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 03:03:38,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:03:38,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:03:38,761 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:03:38,834 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 03:03:38,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 189 transitions, 394 flow [2022-11-23 03:03:38,974 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-11-23 03:03:38,974 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:03:38,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-11-23 03:03:38,981 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 189 transitions, 394 flow [2022-11-23 03:03:38,987 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 178 transitions, 368 flow [2022-11-23 03:03:38,992 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:03:39,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 178 transitions, 368 flow [2022-11-23 03:03:39,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 178 transitions, 368 flow [2022-11-23 03:03:39,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 178 transitions, 368 flow [2022-11-23 03:03:39,129 INFO L130 PetriNetUnfolder]: 15/178 cut-off events. [2022-11-23 03:03:39,129 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:03:39,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 15/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 152. Up to 2 conditions per place. [2022-11-23 03:03:39,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2022-11-23 03:03:47,895 INFO L134 LiptonReduction]: Checked pairs total: 1077 [2022-11-23 03:03:47,895 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-23 03:03:47,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:03:47,952 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;@6960442b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:03:47,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-23 03:03:47,974 INFO L130 PetriNetUnfolder]: 5/21 cut-off events. [2022-11-23 03:03:47,975 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 03:03:47,975 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:47,976 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:47,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2002822666, now seen corresponding path program 1 times [2022-11-23 03:03:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:47,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515898716] [2022-11-23 03:03:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:47,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:48,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:48,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515898716] [2022-11-23 03:03:48,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515898716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:48,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:48,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:03:48,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612824379] [2022-11-23 03:03:48,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:48,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:03:48,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:03:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:03:48,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 379 [2022-11-23 03:03:48,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2022-11-23 03:03:48,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:48,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 379 [2022-11-23 03:03:48,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:48,965 INFO L130 PetriNetUnfolder]: 71/123 cut-off events. [2022-11-23 03:03:48,966 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-23 03:03:48,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 123 events. 71/123 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 315 event pairs, 34 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 206. Up to 119 conditions per place. [2022-11-23 03:03:48,969 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-11-23 03:03:48,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 102 flow [2022-11-23 03:03:48,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:03:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:03:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2022-11-23 03:03:48,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45030782761653476 [2022-11-23 03:03:48,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2022-11-23 03:03:48,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2022-11-23 03:03:48,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:48,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2022-11-23 03:03:49,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 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) [2022-11-23 03:03:49,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:49,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:49,015 INFO L175 Difference]: Start difference. First operand has 24 places, 22 transitions, 56 flow. Second operand 3 states and 512 transitions. [2022-11-23 03:03:49,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 102 flow [2022-11-23 03:03:49,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 03:03:49,021 INFO L231 Difference]: Finished difference. Result has 23 places, 23 transitions, 60 flow [2022-11-23 03:03:49,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=23, PETRI_TRANSITIONS=23} [2022-11-23 03:03:49,028 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2022-11-23 03:03:49,029 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 23 transitions, 60 flow [2022-11-23 03:03:49,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 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) [2022-11-23 03:03:49,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:49,030 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:49,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:03:49,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:49,032 INFO L85 PathProgramCache]: Analyzing trace with hash -386016123, now seen corresponding path program 1 times [2022-11-23 03:03:49,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:49,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999449273] [2022-11-23 03:03:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:49,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:49,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:49,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999449273] [2022-11-23 03:03:49,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999449273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:49,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049884060] [2022-11-23 03:03:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:49,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:49,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:49,280 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:03:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:03:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:49,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:03:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:49,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049884060] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:49,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:03:49,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 10 [2022-11-23 03:03:49,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674922717] [2022-11-23 03:03:49,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:03:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:03:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:03:49,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-23 03:03:49,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 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) [2022-11-23 03:03:49,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:49,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-23 03:03:49,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:50,055 INFO L130 PetriNetUnfolder]: 134/218 cut-off events. [2022-11-23 03:03:50,056 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-23 03:03:50,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 218 events. 134/218 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 702 event pairs, 24 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 437. Up to 82 conditions per place. [2022-11-23 03:03:50,059 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 29 selfloop transitions, 8 changer transitions 0/38 dead transitions. [2022-11-23 03:03:50,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 38 transitions, 166 flow [2022-11-23 03:03:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:03:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:03:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 962 transitions. [2022-11-23 03:03:50,067 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4230430958663149 [2022-11-23 03:03:50,068 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 962 transitions. [2022-11-23 03:03:50,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 962 transitions. [2022-11-23 03:03:50,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:50,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 962 transitions. [2022-11-23 03:03:50,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 160.33333333333334) internal successors, (962), 6 states have internal predecessors, (962), 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) [2022-11-23 03:03:50,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:03:50,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:03:50,082 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 60 flow. Second operand 6 states and 962 transitions. [2022-11-23 03:03:50,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 38 transitions, 166 flow [2022-11-23 03:03:50,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 38 transitions, 162 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 03:03:50,085 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 91 flow [2022-11-23 03:03:50,085 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2022-11-23 03:03:50,086 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2022-11-23 03:03:50,086 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 91 flow [2022-11-23 03:03:50,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 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) [2022-11-23 03:03:50,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:50,087 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:50,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:50,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2066908186, now seen corresponding path program 1 times [2022-11-23 03:03:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:50,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409270167] [2022-11-23 03:03:50,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:50,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:03:50,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:50,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409270167] [2022-11-23 03:03:50,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409270167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:50,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:50,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 03:03:50,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014529642] [2022-11-23 03:03:50,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:50,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:03:50,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:50,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:03:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:03:50,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 379 [2022-11-23 03:03:50,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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) [2022-11-23 03:03:50,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:50,589 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 379 [2022-11-23 03:03:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:50,820 INFO L130 PetriNetUnfolder]: 198/324 cut-off events. [2022-11-23 03:03:50,820 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-23 03:03:50,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 324 events. 198/324 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1097 event pairs, 36 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 768. Up to 193 conditions per place. [2022-11-23 03:03:50,828 INFO L137 encePairwiseOnDemand]: 373/379 looper letters, 37 selfloop transitions, 15 changer transitions 0/52 dead transitions. [2022-11-23 03:03:50,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 52 transitions, 282 flow [2022-11-23 03:03:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:03:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:03:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 846 transitions. [2022-11-23 03:03:50,833 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44643799472295514 [2022-11-23 03:03:50,833 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 846 transitions. [2022-11-23 03:03:50,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 846 transitions. [2022-11-23 03:03:50,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:50,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 846 transitions. [2022-11-23 03:03:50,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 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) [2022-11-23 03:03:50,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 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) [2022-11-23 03:03:50,844 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 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) [2022-11-23 03:03:50,844 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 91 flow. Second operand 5 states and 846 transitions. [2022-11-23 03:03:50,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 52 transitions, 282 flow [2022-11-23 03:03:50,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 52 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 03:03:50,850 INFO L231 Difference]: Finished difference. Result has 34 places, 39 transitions, 211 flow [2022-11-23 03:03:50,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=34, PETRI_TRANSITIONS=39} [2022-11-23 03:03:50,853 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2022-11-23 03:03:50,853 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 39 transitions, 211 flow [2022-11-23 03:03:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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) [2022-11-23 03:03:50,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:50,855 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 03:03:50,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:50,857 INFO L85 PathProgramCache]: Analyzing trace with hash 339651268, now seen corresponding path program 2 times [2022-11-23 03:03:50,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:50,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426206963] [2022-11-23 03:03:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:50,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:03:51,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:51,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426206963] [2022-11-23 03:03:51,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426206963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:51,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:51,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:03:51,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553535657] [2022-11-23 03:03:51,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:51,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:03:51,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:51,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:03:51,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:03:51,100 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 379 [2022-11-23 03:03:51,101 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 39 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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) [2022-11-23 03:03:51,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:51,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 379 [2022-11-23 03:03:51,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:51,249 INFO L130 PetriNetUnfolder]: 255/414 cut-off events. [2022-11-23 03:03:51,250 INFO L131 PetriNetUnfolder]: For 640/652 co-relation queries the response was YES. [2022-11-23 03:03:51,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 414 events. 255/414 cut-off events. For 640/652 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1476 event pairs, 81 based on Foata normal form. 9/411 useless extension candidates. Maximal degree in co-relation 1389. Up to 222 conditions per place. [2022-11-23 03:03:51,254 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 46 selfloop transitions, 5 changer transitions 2/55 dead transitions. [2022-11-23 03:03:51,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 55 transitions, 399 flow [2022-11-23 03:03:51,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:03:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:03:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2022-11-23 03:03:51,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4731750219876869 [2022-11-23 03:03:51,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2022-11-23 03:03:51,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2022-11-23 03:03:51,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:51,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2022-11-23 03:03:51,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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) [2022-11-23 03:03:51,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:51,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:51,265 INFO L175 Difference]: Start difference. First operand has 34 places, 39 transitions, 211 flow. Second operand 3 states and 538 transitions. [2022-11-23 03:03:51,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 55 transitions, 399 flow [2022-11-23 03:03:51,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 395 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-23 03:03:51,271 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 237 flow [2022-11-23 03:03:51,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2022-11-23 03:03:51,273 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 13 predicate places. [2022-11-23 03:03:51,273 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 237 flow [2022-11-23 03:03:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 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) [2022-11-23 03:03:51,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:51,274 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:03:51,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:03:51,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:51,276 INFO L85 PathProgramCache]: Analyzing trace with hash 373219585, now seen corresponding path program 1 times [2022-11-23 03:03:51,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:51,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735801952] [2022-11-23 03:03:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:51,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:03:51,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:51,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735801952] [2022-11-23 03:03:51,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735801952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:51,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611415179] [2022-11-23 03:03:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:51,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:51,680 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:51,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:03:51,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 03:03:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:03:51,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:03:51,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611415179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:51,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:03:51,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-23 03:03:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144265645] [2022-11-23 03:03:51,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:51,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:03:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:51,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:03:51,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:03:51,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 379 [2022-11-23 03:03:51,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-11-23 03:03:51,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:51,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 379 [2022-11-23 03:03:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:52,014 INFO L130 PetriNetUnfolder]: 241/414 cut-off events. [2022-11-23 03:03:52,015 INFO L131 PetriNetUnfolder]: For 691/706 co-relation queries the response was YES. [2022-11-23 03:03:52,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1477 conditions, 414 events. 241/414 cut-off events. For 691/706 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1594 event pairs, 61 based on Foata normal form. 38/446 useless extension candidates. Maximal degree in co-relation 1448. Up to 302 conditions per place. [2022-11-23 03:03:52,019 INFO L137 encePairwiseOnDemand]: 376/379 looper letters, 44 selfloop transitions, 2 changer transitions 5/53 dead transitions. [2022-11-23 03:03:52,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 53 transitions, 392 flow [2022-11-23 03:03:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:03:52,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:03:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 534 transitions. [2022-11-23 03:03:52,022 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46965699208443273 [2022-11-23 03:03:52,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 534 transitions. [2022-11-23 03:03:52,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 534 transitions. [2022-11-23 03:03:52,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:52,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 534 transitions. [2022-11-23 03:03:52,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 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) [2022-11-23 03:03:52,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:52,030 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 379.0) internal successors, (1516), 4 states have internal predecessors, (1516), 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) [2022-11-23 03:03:52,030 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 237 flow. Second operand 3 states and 534 transitions. [2022-11-23 03:03:52,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 53 transitions, 392 flow [2022-11-23 03:03:52,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 387 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:03:52,035 INFO L231 Difference]: Finished difference. Result has 39 places, 41 transitions, 242 flow [2022-11-23 03:03:52,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=39, PETRI_TRANSITIONS=41} [2022-11-23 03:03:52,036 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 15 predicate places. [2022-11-23 03:03:52,037 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 41 transitions, 242 flow [2022-11-23 03:03:52,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-11-23 03:03:52,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:52,038 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] [2022-11-23 03:03:52,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:03:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:52,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash 254478298, now seen corresponding path program 1 times [2022-11-23 03:03:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:52,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29305135] [2022-11-23 03:03:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:52,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:03:52,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:52,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29305135] [2022-11-23 03:03:52,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29305135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:03:52,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:03:52,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:03:52,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682537669] [2022-11-23 03:03:52,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:03:52,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:03:52,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:03:52,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:03:52,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:03:52,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 379 [2022-11-23 03:03:52,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 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) [2022-11-23 03:03:52,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:03:52,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 379 [2022-11-23 03:03:52,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:03:52,693 INFO L130 PetriNetUnfolder]: 291/523 cut-off events. [2022-11-23 03:03:52,694 INFO L131 PetriNetUnfolder]: For 1051/1065 co-relation queries the response was YES. [2022-11-23 03:03:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1925 conditions, 523 events. 291/523 cut-off events. For 1051/1065 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2205 event pairs, 169 based on Foata normal form. 25/535 useless extension candidates. Maximal degree in co-relation 1501. Up to 407 conditions per place. [2022-11-23 03:03:52,699 INFO L137 encePairwiseOnDemand]: 374/379 looper letters, 38 selfloop transitions, 2 changer transitions 20/62 dead transitions. [2022-11-23 03:03:52,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 62 transitions, 468 flow [2022-11-23 03:03:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 03:03:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 03:03:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 843 transitions. [2022-11-23 03:03:52,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44485488126649075 [2022-11-23 03:03:52,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 843 transitions. [2022-11-23 03:03:52,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 843 transitions. [2022-11-23 03:03:52,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:03:52,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 843 transitions. [2022-11-23 03:03:52,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.6) internal successors, (843), 5 states have internal predecessors, (843), 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) [2022-11-23 03:03:52,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 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) [2022-11-23 03:03:52,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 379.0) internal successors, (2274), 6 states have internal predecessors, (2274), 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) [2022-11-23 03:03:52,720 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 242 flow. Second operand 5 states and 843 transitions. [2022-11-23 03:03:52,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 62 transitions, 468 flow [2022-11-23 03:03:52,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 62 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 03:03:52,728 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 256 flow [2022-11-23 03:03:52,729 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-11-23 03:03:52,732 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2022-11-23 03:03:52,732 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 256 flow [2022-11-23 03:03:52,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 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) [2022-11-23 03:03:52,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:03:52,733 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] [2022-11-23 03:03:52,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 03:03:52,734 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:03:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:03:52,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1833596770, now seen corresponding path program 1 times [2022-11-23 03:03:52,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:03:52,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797378929] [2022-11-23 03:03:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:03:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:03:55,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:03:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797378929] [2022-11-23 03:03:55,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797378929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:03:55,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146953945] [2022-11-23 03:03:55,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:03:55,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:03:55,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:03:55,429 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:03:55,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:03:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:03:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 03:03:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:03:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:03:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:03:55,674 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:03:55,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 03:03:55,775 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 15 treesize of output 11 [2022-11-23 03:03:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:03:55,889 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-23 03:03:55,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 03:03:55,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:03:56,009 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 6 treesize of output 5 [2022-11-23 03:03:56,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 03:03:56,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 10 [2022-11-23 03:03:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:03:56,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:04:00,082 WARN L837 $PredicateComparison]: unable to prove that (or (not (< c_~end~0 c_~n~0)) (let ((.cse3 (+ (* c_~end~0 4) c_~queue~0.offset))) (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse1 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse4 (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse0 (select .cse4 c_~queue~0.base)) (.cse2 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse0 (+ (* c_~start~0 4) c_~queue~0.offset)) (+ (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2) 1)) (not (= (select .cse0 .cse3) (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse2)))))))) (or (not (= (mod c_~ok~0 256) 0)) (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (not (let ((.cse5 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse5 c_~queue~0.base) .cse3) (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset))))))))) (not (<= 0 c_~end~0))) is different from false [2022-11-23 03:04:00,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:00,386 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 123 treesize of output 87 [2022-11-23 03:04:00,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:00,416 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 2532 treesize of output 2448 [2022-11-23 03:04:00,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:00,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2436 treesize of output 2216 [2022-11-23 03:04:00,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:00,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2172 treesize of output 1736 [2022-11-23 03:04:00,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:00,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1692 treesize of output 1400 [2022-11-23 03:04:07,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:07,644 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 62 treesize of output 51 [2022-11-23 03:04:07,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 03:04:07,655 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 1670 treesize of output 1606 [2022-11-23 03:04:07,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:07,691 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 1606 treesize of output 1335 [2022-11-23 03:04:07,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:04:07,721 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 1318 treesize of output 1095 [2022-11-23 03:04:07,740 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 1078 treesize of output 886 [2022-11-23 03:04:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 03:04:08,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146953945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:04:08,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:04:08,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 29 [2022-11-23 03:04:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760472223] [2022-11-23 03:04:08,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:04:08,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 03:04:08,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:04:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 03:04:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=709, Unknown=6, NotChecked=56, Total=930 [2022-11-23 03:04:08,725 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 379 [2022-11-23 03:04:08,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 256 flow. Second operand has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 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) [2022-11-23 03:04:08,730 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:04:08,730 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 379 [2022-11-23 03:04:08,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:04:09,836 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse16 (* c_~end~0 4)) (.cse17 (* c_~start~0 4))) (let ((.cse3 (+ .cse17 c_~queue~0.offset)) (.cse6 (+ .cse16 c_~queue~0.offset)) (.cse0 (not (< c_~end~0 c_~n~0))) (.cse1 (not (<= 0 c_~end~0))) (.cse8 (not (= (mod c_~ok~0 256) 0)))) (and (or .cse0 .cse1 (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse7 (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse2 (select .cse7 c_~queue~0.base)) (.cse5 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse2 .cse3) (+ (select (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5) 1)) (not (= (select .cse2 .cse6) (select (select .cse7 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse5)))))))) (or .cse8 (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int))) (not (let ((.cse9 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse9 c_~queue~0.base) .cse6) (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset))))))))) (= c_~ok~0 1) (or .cse0 (and (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (let ((.cse11 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179))) (let ((.cse13 (store .cse11 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (let ((.cse10 (select .cse13 c_~queue~0.base)) (.cse12 (+ (* ~i~0 4) ~A~0.offset))) (or (< (select .cse10 .cse3) (+ (select (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse12) 1)) (not (= (select .cse10 .cse6) (select (select .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse12)))))))) (or .cse8 (forall ((~A~0.offset Int) (v_ArrVal_180 (Array Int Int)) (~i~0 Int) (v_ArrVal_179 (Array Int Int)) (v_ArrVal_178 (Array Int Int))) (not (let ((.cse14 (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_178) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_179) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_180))) (= (select (select .cse14 c_~queue~0.base) .cse6) (select (select .cse14 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* ~i~0 4) ~A~0.offset)))))))) .cse1) (or .cse0 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse1 (let ((.cse15 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_109|) 0))))) (and (or .cse8 .cse15) (or (= .cse16 .cse17) .cse15) (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t2~0#1.base|) 0)))))))) is different from false [2022-11-23 03:04:32,546 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 110 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:04:37,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:04:44,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:04:52,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:05:04,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 03:05:19,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:05:19,878 INFO L130 PetriNetUnfolder]: 1958/3296 cut-off events. [2022-11-23 03:05:19,879 INFO L131 PetriNetUnfolder]: For 4859/4859 co-relation queries the response was YES. [2022-11-23 03:05:19,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12006 conditions, 3296 events. 1958/3296 cut-off events. For 4859/4859 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18874 event pairs, 186 based on Foata normal form. 50/3340 useless extension candidates. Maximal degree in co-relation 11981. Up to 901 conditions per place. [2022-11-23 03:05:19,914 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 370 selfloop transitions, 224 changer transitions 114/708 dead transitions. [2022-11-23 03:05:19,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 708 transitions, 5266 flow [2022-11-23 03:05:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-23 03:05:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-11-23 03:05:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 7700 transitions. [2022-11-23 03:05:19,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2638522427440633 [2022-11-23 03:05:19,951 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 7700 transitions. [2022-11-23 03:05:19,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 7700 transitions. [2022-11-23 03:05:19,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:05:19,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 7700 transitions. [2022-11-23 03:05:19,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 100.0) internal successors, (7700), 77 states have internal predecessors, (7700), 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) [2022-11-23 03:05:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 379.0) internal successors, (29562), 78 states have internal predecessors, (29562), 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) [2022-11-23 03:05:20,088 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 379.0) internal successors, (29562), 78 states have internal predecessors, (29562), 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) [2022-11-23 03:05:20,088 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 256 flow. Second operand 77 states and 7700 transitions. [2022-11-23 03:05:20,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 708 transitions, 5266 flow [2022-11-23 03:05:20,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 708 transitions, 5230 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-23 03:05:20,178 INFO L231 Difference]: Finished difference. Result has 165 places, 283 transitions, 2679 flow [2022-11-23 03:05:20,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=2679, PETRI_PLACES=165, PETRI_TRANSITIONS=283} [2022-11-23 03:05:20,179 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 141 predicate places. [2022-11-23 03:05:20,179 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 283 transitions, 2679 flow [2022-11-23 03:05:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 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) [2022-11-23 03:05:20,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:05:20,182 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] [2022-11-23 03:05:20,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:05:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:05:20,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:05:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:05:20,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2094623690, now seen corresponding path program 2 times [2022-11-23 03:05:20,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:05:20,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640909561] [2022-11-23 03:05:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:05:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:05:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:05:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:05:21,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:05:21,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640909561] [2022-11-23 03:05:21,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640909561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:05:21,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357824073] [2022-11-23 03:05:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:05:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:05:21,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:05:21,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:05:21,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:05:22,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:05:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:05:22,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 03:05:22,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:05:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:22,074 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 03:05:22,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 03:05:22,175 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 15 treesize of output 11 [2022-11-23 03:05:22,248 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:05:22,248 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 11 treesize of output 11 [2022-11-23 03:05:22,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:05:22,386 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 6 treesize of output 5 [2022-11-23 03:05:22,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:05:22,769 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 03:05:22,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-11-23 03:05:22,792 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 27 treesize of output 15 [2022-11-23 03:05:22,995 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 23 treesize of output 7 [2022-11-23 03:05:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:05:23,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:05:23,956 WARN L837 $PredicateComparison]: unable to prove that (or (not (< c_~end~0 c_~n~0)) (not (<= 0 c_~end~0)) (and (forall ((~A~0.offset Int) (~i~0 Int) (v_ArrVal_225 (Array Int Int)) (v_ArrVal_224 (Array Int Int)) (~A~0.base Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_ArrVal_224) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_225))) (let ((.cse1 (select (select .cse0 ~A~0.base) (+ (* ~i~0 4) ~A~0.offset)))) (or (not (= (select (select .cse0 c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) .cse1)) (forall ((v_ArrVal_226 (Array Int Int))) (< (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_226) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ .cse1 1))))))) (not (= (mod c_~ok~0 256) 0)))) is different from false [2022-11-23 03:05:24,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:05:24,220 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 117 treesize of output 81 [2022-11-23 03:05:24,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:05:24,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5260 treesize of output 4670 [2022-11-23 03:05:24,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:05:24,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 4620 treesize of output 3704 [2022-11-23 03:05:24,405 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 2582 treesize of output 2198 [2022-11-23 03:05:24,511 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:05:24,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3276 treesize of output 2840 [2022-11-23 03:06:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-23 03:06:59,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357824073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:06:59,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:06:59,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2022-11-23 03:06:59,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060249056] [2022-11-23 03:06:59,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:06:59,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 03:06:59,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:06:59,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 03:06:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=658, Unknown=9, NotChecked=54, Total=870 [2022-11-23 03:07:00,082 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 379 [2022-11-23 03:07:00,085 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 283 transitions, 2679 flow. Second operand has 30 states, 30 states have (on average 96.1) internal successors, (2883), 30 states have internal predecessors, (2883), 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) [2022-11-23 03:07:00,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:07:00,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 379 [2022-11-23 03:07:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:07:02,731 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_226 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_226) c_~queue~0.base) (+ (* c_~start~0 4) c_~queue~0.offset)) (+ c_~v_old~0 1))) (not (= (mod c_~ok~0 256) 0)) (= c_~ok~0 1)) is different from false [2022-11-23 03:07:12,187 INFO L130 PetriNetUnfolder]: 3232/5426 cut-off events. [2022-11-23 03:07:12,187 INFO L131 PetriNetUnfolder]: For 74450/74450 co-relation queries the response was YES. [2022-11-23 03:07:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33760 conditions, 5426 events. 3232/5426 cut-off events. For 74450/74450 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33641 event pairs, 375 based on Foata normal form. 51/5476 useless extension candidates. Maximal degree in co-relation 33621. Up to 1782 conditions per place. [2022-11-23 03:07:12,266 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 407 selfloop transitions, 355 changer transitions 77/839 dead transitions. [2022-11-23 03:07:12,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 839 transitions, 10372 flow [2022-11-23 03:07:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 03:07:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-23 03:07:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4702 transitions. [2022-11-23 03:07:12,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2697028794309969 [2022-11-23 03:07:12,282 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4702 transitions. [2022-11-23 03:07:12,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4702 transitions. [2022-11-23 03:07:12,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:07:12,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4702 transitions. [2022-11-23 03:07:12,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 102.21739130434783) internal successors, (4702), 46 states have internal predecessors, (4702), 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) [2022-11-23 03:07:12,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 379.0) internal successors, (17813), 47 states have internal predecessors, (17813), 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) [2022-11-23 03:07:12,328 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 379.0) internal successors, (17813), 47 states have internal predecessors, (17813), 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) [2022-11-23 03:07:12,328 INFO L175 Difference]: Start difference. First operand has 165 places, 283 transitions, 2679 flow. Second operand 46 states and 4702 transitions. [2022-11-23 03:07:12,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 839 transitions, 10372 flow [2022-11-23 03:07:12,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 839 transitions, 9360 flow, removed 504 selfloop flow, removed 12 redundant places. [2022-11-23 03:07:12,964 INFO L231 Difference]: Finished difference. Result has 212 places, 497 transitions, 5571 flow [2022-11-23 03:07:12,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=2286, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=5571, PETRI_PLACES=212, PETRI_TRANSITIONS=497} [2022-11-23 03:07:12,965 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 188 predicate places. [2022-11-23 03:07:12,966 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 497 transitions, 5571 flow [2022-11-23 03:07:12,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 96.1) internal successors, (2883), 30 states have internal predecessors, (2883), 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) [2022-11-23 03:07:12,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:07:12,968 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:07:12,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:07:13,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:13,175 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:07:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:07:13,175 INFO L85 PathProgramCache]: Analyzing trace with hash -667662670, now seen corresponding path program 3 times [2022-11-23 03:07:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:07:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427922689] [2022-11-23 03:07:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:07:13,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:07:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:07:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:07:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:07:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427922689] [2022-11-23 03:07:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427922689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:07:16,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325077902] [2022-11-23 03:07:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:07:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:07:16,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:07:16,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:07:16,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 03:07:16,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:07:16,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 03:07:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:07:17,215 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-23 03:07:17,215 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 42 treesize of output 10 [2022-11-23 03:07:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:07:17,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:07:20,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:07:20,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 125 [2022-11-23 03:07:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:07:21,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325077902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:07:21,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:07:21,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 24 [2022-11-23 03:07:21,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524478932] [2022-11-23 03:07:21,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:07:21,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 03:07:21,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:07:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 03:07:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-11-23 03:07:23,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:07:27,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 379 [2022-11-23 03:07:27,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 497 transitions, 5571 flow. Second operand has 26 states, 26 states have (on average 125.5) internal successors, (3263), 26 states have internal predecessors, (3263), 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) [2022-11-23 03:07:27,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:07:27,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 379 [2022-11-23 03:07:27,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:07:34,585 INFO L130 PetriNetUnfolder]: 3801/6338 cut-off events. [2022-11-23 03:07:34,585 INFO L131 PetriNetUnfolder]: For 130186/130186 co-relation queries the response was YES. [2022-11-23 03:07:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45797 conditions, 6338 events. 3801/6338 cut-off events. For 130186/130186 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40421 event pairs, 339 based on Foata normal form. 1/6339 useless extension candidates. Maximal degree in co-relation 45628. Up to 2393 conditions per place. [2022-11-23 03:07:34,681 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 388 selfloop transitions, 345 changer transitions 17/750 dead transitions. [2022-11-23 03:07:34,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 750 transitions, 10396 flow [2022-11-23 03:07:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:07:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-23 03:07:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3482 transitions. [2022-11-23 03:07:34,690 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3402716700869735 [2022-11-23 03:07:34,691 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3482 transitions. [2022-11-23 03:07:34,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3482 transitions. [2022-11-23 03:07:34,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:07:34,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3482 transitions. [2022-11-23 03:07:34,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 128.96296296296296) internal successors, (3482), 27 states have internal predecessors, (3482), 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) [2022-11-23 03:07:34,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 379.0) internal successors, (10612), 28 states have internal predecessors, (10612), 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) [2022-11-23 03:07:34,718 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 379.0) internal successors, (10612), 28 states have internal predecessors, (10612), 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) [2022-11-23 03:07:34,718 INFO L175 Difference]: Start difference. First operand has 212 places, 497 transitions, 5571 flow. Second operand 27 states and 3482 transitions. [2022-11-23 03:07:34,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 750 transitions, 10396 flow [2022-11-23 03:07:36,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 750 transitions, 9413 flow, removed 330 selfloop flow, removed 19 redundant places. [2022-11-23 03:07:36,182 INFO L231 Difference]: Finished difference. Result has 222 places, 602 transitions, 7205 flow [2022-11-23 03:07:36,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7205, PETRI_PLACES=222, PETRI_TRANSITIONS=602} [2022-11-23 03:07:36,183 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 198 predicate places. [2022-11-23 03:07:36,184 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 602 transitions, 7205 flow [2022-11-23 03:07:36,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 125.5) internal successors, (3263), 26 states have internal predecessors, (3263), 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) [2022-11-23 03:07:36,185 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:07:36,185 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:07:36,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:07:36,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:36,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:07:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:07:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash 682706387, now seen corresponding path program 4 times [2022-11-23 03:07:36,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:07:36,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974105308] [2022-11-23 03:07:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:07:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:07:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:07:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:07:36,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:07:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974105308] [2022-11-23 03:07:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974105308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:07:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894211537] [2022-11-23 03:07:36,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:07:36,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:07:36,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:07:36,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:07:36,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:07:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:07:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:07:36,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:07:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:07:36,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:07:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:07:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894211537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:07:37,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:07:37,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 8 [2022-11-23 03:07:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715145024] [2022-11-23 03:07:37,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:07:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:07:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:07:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:07:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:07:37,206 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 379 [2022-11-23 03:07:37,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 602 transitions, 7205 flow. Second operand has 9 states, 9 states have (on average 165.88888888888889) internal successors, (1493), 9 states have internal predecessors, (1493), 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) [2022-11-23 03:07:37,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:07:37,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 379 [2022-11-23 03:07:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:07:39,985 INFO L130 PetriNetUnfolder]: 3945/6883 cut-off events. [2022-11-23 03:07:39,985 INFO L131 PetriNetUnfolder]: For 172394/172691 co-relation queries the response was YES. [2022-11-23 03:07:40,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53236 conditions, 6883 events. 3945/6883 cut-off events. For 172394/172691 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47187 event pairs, 375 based on Foata normal form. 463/7266 useless extension candidates. Maximal degree in co-relation 53129. Up to 2937 conditions per place. [2022-11-23 03:07:40,101 INFO L137 encePairwiseOnDemand]: 375/379 looper letters, 401 selfloop transitions, 233 changer transitions 76/739 dead transitions. [2022-11-23 03:07:40,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 739 transitions, 10497 flow [2022-11-23 03:07:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:07:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 03:07:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1195 transitions. [2022-11-23 03:07:40,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450433471541651 [2022-11-23 03:07:40,106 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1195 transitions. [2022-11-23 03:07:40,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1195 transitions. [2022-11-23 03:07:40,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:07:40,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1195 transitions. [2022-11-23 03:07:40,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 170.71428571428572) internal successors, (1195), 7 states have internal predecessors, (1195), 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) [2022-11-23 03:07:40,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 379.0) internal successors, (3032), 8 states have internal predecessors, (3032), 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) [2022-11-23 03:07:40,116 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 379.0) internal successors, (3032), 8 states have internal predecessors, (3032), 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) [2022-11-23 03:07:40,116 INFO L175 Difference]: Start difference. First operand has 222 places, 602 transitions, 7205 flow. Second operand 7 states and 1195 transitions. [2022-11-23 03:07:40,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 739 transitions, 10497 flow [2022-11-23 03:07:41,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 739 transitions, 10153 flow, removed 150 selfloop flow, removed 18 redundant places. [2022-11-23 03:07:41,564 INFO L231 Difference]: Finished difference. Result has 201 places, 611 transitions, 8444 flow [2022-11-23 03:07:41,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8444, PETRI_PLACES=201, PETRI_TRANSITIONS=611} [2022-11-23 03:07:41,566 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 177 predicate places. [2022-11-23 03:07:41,566 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 611 transitions, 8444 flow [2022-11-23 03:07:41,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 165.88888888888889) internal successors, (1493), 9 states have internal predecessors, (1493), 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) [2022-11-23 03:07:41,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:07:41,567 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:07:41,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:07:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 03:07:41,774 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:07:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:07:41,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1090197603, now seen corresponding path program 5 times [2022-11-23 03:07:41,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:07:41,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204385955] [2022-11-23 03:07:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:07:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:07:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:07:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:07:42,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:07:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204385955] [2022-11-23 03:07:42,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204385955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:07:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256531379] [2022-11-23 03:07:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 03:07:42,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:42,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:07:42,007 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:07:42,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:07:42,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-23 03:07:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:07:42,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:07:42,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:07:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:07:42,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:07:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:07:42,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256531379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:07:42,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:07:42,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-23 03:07:42,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172584270] [2022-11-23 03:07:42,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:07:42,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:07:42,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:07:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:07:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:07:42,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-23 03:07:42,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 611 transitions, 8444 flow. Second operand has 16 states, 16 states have (on average 156.9375) internal successors, (2511), 16 states have internal predecessors, (2511), 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) [2022-11-23 03:07:42,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:07:42,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-23 03:07:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:07:47,349 INFO L130 PetriNetUnfolder]: 6116/10917 cut-off events. [2022-11-23 03:07:47,349 INFO L131 PetriNetUnfolder]: For 192709/193258 co-relation queries the response was YES. [2022-11-23 03:07:47,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82870 conditions, 10917 events. 6116/10917 cut-off events. For 192709/193258 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 84203 event pairs, 646 based on Foata normal form. 264/11040 useless extension candidates. Maximal degree in co-relation 82262. Up to 3794 conditions per place. [2022-11-23 03:07:47,492 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 960 selfloop transitions, 213 changer transitions 0/1202 dead transitions. [2022-11-23 03:07:47,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1202 transitions, 19063 flow [2022-11-23 03:07:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 03:07:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 03:07:47,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1621 transitions. [2022-11-23 03:07:47,496 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4277044854881267 [2022-11-23 03:07:47,496 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1621 transitions. [2022-11-23 03:07:47,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1621 transitions. [2022-11-23 03:07:47,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:07:47,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1621 transitions. [2022-11-23 03:07:47,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.1) internal successors, (1621), 10 states have internal predecessors, (1621), 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) [2022-11-23 03:07:47,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 379.0) internal successors, (4169), 11 states have internal predecessors, (4169), 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) [2022-11-23 03:07:47,505 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 379.0) internal successors, (4169), 11 states have internal predecessors, (4169), 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) [2022-11-23 03:07:47,505 INFO L175 Difference]: Start difference. First operand has 201 places, 611 transitions, 8444 flow. Second operand 10 states and 1621 transitions. [2022-11-23 03:07:47,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1202 transitions, 19063 flow [2022-11-23 03:07:49,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1202 transitions, 18789 flow, removed 137 selfloop flow, removed 0 redundant places. [2022-11-23 03:07:49,569 INFO L231 Difference]: Finished difference. Result has 213 places, 724 transitions, 10581 flow [2022-11-23 03:07:49,570 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=8338, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10581, PETRI_PLACES=213, PETRI_TRANSITIONS=724} [2022-11-23 03:07:49,571 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 189 predicate places. [2022-11-23 03:07:49,571 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 724 transitions, 10581 flow [2022-11-23 03:07:49,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 156.9375) internal successors, (2511), 16 states have internal predecessors, (2511), 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) [2022-11-23 03:07:49,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:07:49,572 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:07:49,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:07:49,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:49,780 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:07:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:07:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1695169610, now seen corresponding path program 6 times [2022-11-23 03:07:49,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:07:49,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936660953] [2022-11-23 03:07:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:07:49,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:07:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:07:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:07:52,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:07:52,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936660953] [2022-11-23 03:07:52,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936660953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:07:52,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856307357] [2022-11-23 03:07:52,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 03:07:52,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:07:52,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:07:52,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:07:52,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:07:52,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 03:07:52,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:07:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 03:07:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:07:53,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:07:53,422 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-23 03:07:53,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 44 [2022-11-23 03:07:53,431 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 27 treesize of output 15 [2022-11-23 03:07:53,577 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 23 treesize of output 7 [2022-11-23 03:07:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:07:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:07:54,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:07:54,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 139 [2022-11-23 03:07:54,173 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 42 treesize of output 36 [2022-11-23 03:07:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:07:54,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856307357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:07:54,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:07:54,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2022-11-23 03:07:54,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476242043] [2022-11-23 03:07:54,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:07:54,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 03:07:54,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:07:54,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 03:07:54,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=924, Unknown=3, NotChecked=0, Total=1122 [2022-11-23 03:07:58,109 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 379 [2022-11-23 03:07:58,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 724 transitions, 10581 flow. Second operand has 34 states, 34 states have (on average 94.02941176470588) internal successors, (3197), 34 states have internal predecessors, (3197), 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) [2022-11-23 03:07:58,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:07:58,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 379 [2022-11-23 03:07:58,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:08:06,645 INFO L130 PetriNetUnfolder]: 8887/15414 cut-off events. [2022-11-23 03:08:06,646 INFO L131 PetriNetUnfolder]: For 281217/281217 co-relation queries the response was YES. [2022-11-23 03:08:06,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121038 conditions, 15414 events. 8887/15414 cut-off events. For 281217/281217 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 119623 event pairs, 606 based on Foata normal form. 6/15420 useless extension candidates. Maximal degree in co-relation 120528. Up to 5258 conditions per place. [2022-11-23 03:08:06,877 INFO L137 encePairwiseOnDemand]: 364/379 looper letters, 560 selfloop transitions, 605 changer transitions 45/1210 dead transitions. [2022-11-23 03:08:06,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1210 transitions, 20452 flow [2022-11-23 03:08:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 03:08:06,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 03:08:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2550 transitions. [2022-11-23 03:08:06,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.25877816115283137 [2022-11-23 03:08:06,885 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2550 transitions. [2022-11-23 03:08:06,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2550 transitions. [2022-11-23 03:08:06,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:08:06,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2550 transitions. [2022-11-23 03:08:06,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.07692307692308) internal successors, (2550), 26 states have internal predecessors, (2550), 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) [2022-11-23 03:08:06,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 379.0) internal successors, (10233), 27 states have internal predecessors, (10233), 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) [2022-11-23 03:08:06,903 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 379.0) internal successors, (10233), 27 states have internal predecessors, (10233), 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) [2022-11-23 03:08:06,904 INFO L175 Difference]: Start difference. First operand has 213 places, 724 transitions, 10581 flow. Second operand 26 states and 2550 transitions. [2022-11-23 03:08:06,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1210 transitions, 20452 flow [2022-11-23 03:08:10,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1210 transitions, 20152 flow, removed 91 selfloop flow, removed 3 redundant places. [2022-11-23 03:08:10,403 INFO L231 Difference]: Finished difference. Result has 243 places, 919 transitions, 15504 flow [2022-11-23 03:08:10,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=10454, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=15504, PETRI_PLACES=243, PETRI_TRANSITIONS=919} [2022-11-23 03:08:10,404 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 219 predicate places. [2022-11-23 03:08:10,404 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 919 transitions, 15504 flow [2022-11-23 03:08:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 94.02941176470588) internal successors, (3197), 34 states have internal predecessors, (3197), 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) [2022-11-23 03:08:10,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:08:10,406 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:08:10,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 03:08:10,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:08:10,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:08:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:08:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1825181786, now seen corresponding path program 7 times [2022-11-23 03:08:10,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:08:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456527094] [2022-11-23 03:08:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:08:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:08:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:08:14,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:08:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456527094] [2022-11-23 03:08:14,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456527094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:08:14,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923520043] [2022-11-23 03:08:14,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 03:08:14,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:08:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:08:14,275 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:08:14,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:08:14,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:08:14,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 03:08:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:08:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:08:14,863 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 18 treesize of output 20 [2022-11-23 03:08:15,226 INFO L321 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2022-11-23 03:08:15,226 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 42 treesize of output 10 [2022-11-23 03:08:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:08:15,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:08:22,266 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:08:22,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 277 [2022-11-23 03:08:22,308 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:08:22,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 189 [2022-11-23 03:08:22,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:08:22,335 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 144 treesize of output 137 [2022-11-23 03:08:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 03:08:23,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923520043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:08:23,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:08:23,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 33 [2022-11-23 03:08:23,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314229122] [2022-11-23 03:08:23,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:08:23,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 03:08:23,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:08:23,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 03:08:23,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1006, Unknown=2, NotChecked=0, Total=1190 [2022-11-23 03:08:28,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 379 [2022-11-23 03:08:28,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 919 transitions, 15504 flow. Second operand has 35 states, 35 states have (on average 90.97142857142858) internal successors, (3184), 35 states have internal predecessors, (3184), 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) [2022-11-23 03:08:28,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:08:28,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 379 [2022-11-23 03:08:28,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:08:53,591 WARN L233 SmtUtils]: Spent 18.69s on a formula simplification. DAG size of input: 79 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:08:56,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:09:03,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:09:22,427 WARN L233 SmtUtils]: Spent 18.29s on a formula simplification. DAG size of input: 83 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:09:24,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:09:33,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:09:52,386 WARN L233 SmtUtils]: Spent 18.91s on a formula simplification. DAG size of input: 79 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:09:55,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:09:57,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:19,600 WARN L233 SmtUtils]: Spent 18.23s on a formula simplification. DAG size of input: 77 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:10:21,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:23,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:32,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:32,583 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (not (= (mod c_~ok~0 256) 0))) (.cse4 (* c_~end~0 4)) (.cse9 (* c_~start~0 4)) (.cse10 (+ c_~v_old~0 1)) (.cse5 (+ c_~A~0.offset (* c_~i~0 4)))) (let ((.cse1 (and (not (< c_~start~0 c_~end~0)) (not (< c_~i~0 c_~N~0)))) (.cse0 (not (<= |c_thread1Thread1of1ForFork0_#t~mem1#1| c_~last~0))) (.cse2 (let ((.cse11 (select (select |c_#memory_int| c_~A~0.base) .cse5))) (and (or .cse6 (forall ((~queue~0.base Int) (~queue~0.offset Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) (+ .cse4 ~queue~0.offset)) .cse11)))) (forall ((~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse12 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse12 (+ .cse4 ~queue~0.offset)) .cse11)) (< (select .cse12 (+ .cse9 ~queue~0.offset)) .cse10)))))))) (and (= 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 .cse1 .cse2) (or .cse0 .cse1 (and (or (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (not (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (= (select (select .cse3 ~queue~0.base) (+ .cse4 ~queue~0.offset)) (select (select .cse3 c_~A~0.base) .cse5))))) .cse6) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (let ((.cse7 (select .cse8 ~queue~0.base))) (or (not (= (select .cse7 (+ .cse4 ~queue~0.offset)) (select (select .cse8 c_~A~0.base) .cse5))) (< (select .cse7 (+ .cse9 ~queue~0.offset)) .cse10))))))) (= c_~ok~0 1) (<= (+ 2 c_~A~0.base) |c_ULTIMATE.start_main_~#t2~0#1.base|) (<= c_~last~0 c_~v_old~0) (= c_~start~0 c_~end~0) (<= (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 (= (mod |c_thread2Thread1of1ForFork1_~cond~0#1| 256) 0) .cse2)))) is different from false [2022-11-23 03:10:33,437 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (not (= (mod c_~ok~0 256) 0))) (.cse4 (* c_~end~0 4)) (.cse9 (* c_~start~0 4)) (.cse10 (+ c_~v_old~0 1)) (.cse5 (+ c_~A~0.offset (* c_~i~0 4)))) (let ((.cse1 (and (not (< c_~start~0 c_~end~0)) (not (< c_~i~0 c_~N~0)))) (.cse0 (not (<= |c_thread1Thread1of1ForFork0_#t~mem1#1| c_~last~0))) (.cse2 (let ((.cse11 (select (select |c_#memory_int| c_~A~0.base) .cse5))) (and (or .cse6 (forall ((~queue~0.base Int) (~queue~0.offset Int)) (not (= (select (select |c_#memory_int| ~queue~0.base) (+ .cse4 ~queue~0.offset)) .cse11)))) (forall ((~queue~0.base Int) (~queue~0.offset Int)) (let ((.cse12 (select |c_#memory_int| ~queue~0.base))) (or (not (= (select .cse12 (+ .cse4 ~queue~0.offset)) .cse11)) (< (select .cse12 (+ .cse9 ~queue~0.offset)) .cse10)))))))) (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 .cse1 .cse2) (or .cse0 .cse1 (and (or (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (not (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (= (select (select .cse3 ~queue~0.base) (+ .cse4 ~queue~0.offset)) (select (select .cse3 c_~A~0.base) .cse5))))) .cse6) (forall ((~queue~0.base Int) (~queue~0.offset Int) (v_ArrVal_454 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_454))) (let ((.cse7 (select .cse8 ~queue~0.base))) (or (not (= (select .cse7 (+ .cse4 ~queue~0.offset)) (select (select .cse8 c_~A~0.base) .cse5))) (< (select .cse7 (+ .cse9 ~queue~0.offset)) .cse10))))))) (= c_~ok~0 1) (<= (+ 2 c_~A~0.base) |c_ULTIMATE.start_main_~#t2~0#1.base|) (<= c_~last~0 c_~v_old~0) (= c_~start~0 c_~end~0) (<= (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_main_~#t2~0#1.base|) (or .cse0 (= (mod |c_thread2Thread1of1ForFork1_~cond~0#1| 256) 0) .cse2)))) is different from false [2022-11-23 03:10:45,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:48,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:50,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:53,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:55,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:10:58,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:11:02,241 INFO L130 PetriNetUnfolder]: 10779/18957 cut-off events. [2022-11-23 03:11:02,242 INFO L131 PetriNetUnfolder]: For 391412/391412 co-relation queries the response was YES. [2022-11-23 03:11:02,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156772 conditions, 18957 events. 10779/18957 cut-off events. For 391412/391412 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 154343 event pairs, 1555 based on Foata normal form. 10/18967 useless extension candidates. Maximal degree in co-relation 156656. Up to 8057 conditions per place. [2022-11-23 03:11:02,584 INFO L137 encePairwiseOnDemand]: 358/379 looper letters, 595 selfloop transitions, 863 changer transitions 107/1565 dead transitions. [2022-11-23 03:11:02,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 1565 transitions, 27836 flow [2022-11-23 03:11:02,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 03:11:02,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-23 03:11:02,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4896 transitions. [2022-11-23 03:11:02,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.2484270347067181 [2022-11-23 03:11:02,596 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4896 transitions. [2022-11-23 03:11:02,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4896 transitions. [2022-11-23 03:11:02,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:11:02,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4896 transitions. [2022-11-23 03:11:02,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 94.15384615384616) internal successors, (4896), 52 states have internal predecessors, (4896), 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) [2022-11-23 03:11:02,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 379.0) internal successors, (20087), 53 states have internal predecessors, (20087), 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) [2022-11-23 03:11:02,632 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 379.0) internal successors, (20087), 53 states have internal predecessors, (20087), 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) [2022-11-23 03:11:02,633 INFO L175 Difference]: Start difference. First operand has 243 places, 919 transitions, 15504 flow. Second operand 52 states and 4896 transitions. [2022-11-23 03:11:02,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 1565 transitions, 27836 flow [2022-11-23 03:11:09,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1565 transitions, 27077 flow, removed 142 selfloop flow, removed 8 redundant places. [2022-11-23 03:11:09,333 INFO L231 Difference]: Finished difference. Result has 308 places, 1202 transitions, 22982 flow [2022-11-23 03:11:09,334 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=14976, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=22982, PETRI_PLACES=308, PETRI_TRANSITIONS=1202} [2022-11-23 03:11:09,334 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 284 predicate places. [2022-11-23 03:11:09,335 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 1202 transitions, 22982 flow [2022-11-23 03:11:09,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 90.97142857142858) internal successors, (3184), 35 states have internal predecessors, (3184), 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) [2022-11-23 03:11:09,335 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:11:09,335 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:09,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:09,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:11:09,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:11:09,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:09,538 INFO L85 PathProgramCache]: Analyzing trace with hash 594549230, now seen corresponding path program 1 times [2022-11-23 03:11:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:11:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143389819] [2022-11-23 03:11:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:09,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:11:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:11:09,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:11:09,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143389819] [2022-11-23 03:11:09,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143389819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:09,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426207545] [2022-11-23 03:11:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:09,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:11:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:11:09,704 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:11:09,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:11:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 03:11:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:11:09,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 03:11:10,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426207545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:11:10,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:11:10,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2022-11-23 03:11:10,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517396944] [2022-11-23 03:11:10,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:11:10,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:11:10,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:11:10,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:11:10,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:11:10,270 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 379 [2022-11-23 03:11:10,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 1202 transitions, 22982 flow. Second operand has 8 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 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) [2022-11-23 03:11:10,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:11:10,271 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 379 [2022-11-23 03:11:10,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:11:20,232 INFO L130 PetriNetUnfolder]: 11319/19678 cut-off events. [2022-11-23 03:11:20,233 INFO L131 PetriNetUnfolder]: For 529823/529823 co-relation queries the response was YES. [2022-11-23 03:11:20,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190203 conditions, 19678 events. 11319/19678 cut-off events. For 529823/529823 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 157675 event pairs, 1376 based on Foata normal form. 108/19786 useless extension candidates. Maximal degree in co-relation 189706. Up to 6734 conditions per place. [2022-11-23 03:11:20,664 INFO L137 encePairwiseOnDemand]: 373/379 looper letters, 732 selfloop transitions, 698 changer transitions 1/1431 dead transitions. [2022-11-23 03:11:20,665 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 1431 transitions, 29287 flow [2022-11-23 03:11:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:11:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:11:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1021 transitions. [2022-11-23 03:11:20,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4489885664028144 [2022-11-23 03:11:20,667 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1021 transitions. [2022-11-23 03:11:20,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1021 transitions. [2022-11-23 03:11:20,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:11:20,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1021 transitions. [2022-11-23 03:11:20,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.16666666666666) internal successors, (1021), 6 states have internal predecessors, (1021), 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) [2022-11-23 03:11:20,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:20,671 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:20,672 INFO L175 Difference]: Start difference. First operand has 308 places, 1202 transitions, 22982 flow. Second operand 6 states and 1021 transitions. [2022-11-23 03:11:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 1431 transitions, 29287 flow [2022-11-23 03:11:31,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 1431 transitions, 28575 flow, removed 338 selfloop flow, removed 14 redundant places. [2022-11-23 03:11:31,508 INFO L231 Difference]: Finished difference. Result has 291 places, 1314 transitions, 27288 flow [2022-11-23 03:11:31,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=22257, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=27288, PETRI_PLACES=291, PETRI_TRANSITIONS=1314} [2022-11-23 03:11:31,510 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 267 predicate places. [2022-11-23 03:11:31,510 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 1314 transitions, 27288 flow [2022-11-23 03:11:31,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 165.625) internal successors, (1325), 8 states have internal predecessors, (1325), 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) [2022-11-23 03:11:31,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:11:31,511 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:31,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:31,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:11:31,716 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:11:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:31,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1609987860, now seen corresponding path program 2 times [2022-11-23 03:11:31,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:11:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25849989] [2022-11-23 03:11:31,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:31,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:11:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 03:11:32,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:11:32,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25849989] [2022-11-23 03:11:32,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25849989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:11:32,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:11:32,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:11:32,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283309379] [2022-11-23 03:11:32,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:11:32,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:11:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:11:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:11:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:11:32,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 379 [2022-11-23 03:11:32,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 1314 transitions, 27288 flow. Second operand has 6 states, 6 states have (on average 154.66666666666666) internal successors, (928), 6 states have internal predecessors, (928), 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) [2022-11-23 03:11:32,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:11:32,378 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 379 [2022-11-23 03:11:32,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:11:40,282 INFO L130 PetriNetUnfolder]: 7632/13610 cut-off events. [2022-11-23 03:11:40,283 INFO L131 PetriNetUnfolder]: For 381311/382079 co-relation queries the response was YES. [2022-11-23 03:11:40,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133282 conditions, 13610 events. 7632/13610 cut-off events. For 381311/382079 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 107076 event pairs, 688 based on Foata normal form. 112/13623 useless extension candidates. Maximal degree in co-relation 132835. Up to 12171 conditions per place. [2022-11-23 03:11:40,556 INFO L137 encePairwiseOnDemand]: 372/379 looper letters, 807 selfloop transitions, 151 changer transitions 0/1005 dead transitions. [2022-11-23 03:11:40,556 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1005 transitions, 22621 flow [2022-11-23 03:11:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:11:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:11:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 946 transitions. [2022-11-23 03:11:40,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4160070360598065 [2022-11-23 03:11:40,558 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 946 transitions. [2022-11-23 03:11:40,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 946 transitions. [2022-11-23 03:11:40,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:11:40,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 946 transitions. [2022-11-23 03:11:40,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 157.66666666666666) internal successors, (946), 6 states have internal predecessors, (946), 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) [2022-11-23 03:11:40,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:40,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:40,563 INFO L175 Difference]: Start difference. First operand has 291 places, 1314 transitions, 27288 flow. Second operand 6 states and 946 transitions. [2022-11-23 03:11:40,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1005 transitions, 22621 flow [2022-11-23 03:11:45,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1005 transitions, 21661 flow, removed 135 selfloop flow, removed 20 redundant places. [2022-11-23 03:11:45,739 INFO L231 Difference]: Finished difference. Result has 274 places, 999 transitions, 19985 flow [2022-11-23 03:11:45,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=19683, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=19985, PETRI_PLACES=274, PETRI_TRANSITIONS=999} [2022-11-23 03:11:45,740 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 250 predicate places. [2022-11-23 03:11:45,741 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 999 transitions, 19985 flow [2022-11-23 03:11:45,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.66666666666666) internal successors, (928), 6 states have internal predecessors, (928), 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) [2022-11-23 03:11:45,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:11:45,741 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:45,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 03:11:45,742 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:11:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1149268911, now seen corresponding path program 8 times [2022-11-23 03:11:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:11:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361475717] [2022-11-23 03:11:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:11:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:11:45,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:11:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361475717] [2022-11-23 03:11:45,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361475717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703386485] [2022-11-23 03:11:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:11:45,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:11:45,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:11:45,935 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:11:45,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:11:46,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:11:46,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:11:46,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:11:46,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:11:46,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 03:11:46,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703386485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:11:46,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:11:46,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-23 03:11:46,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957879184] [2022-11-23 03:11:46,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:11:46,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:11:46,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:11:46,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:11:46,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:11:46,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 379 [2022-11-23 03:11:46,819 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 999 transitions, 19985 flow. Second operand has 15 states, 15 states have (on average 157.46666666666667) internal successors, (2362), 15 states have internal predecessors, (2362), 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) [2022-11-23 03:11:46,819 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:11:46,819 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 379 [2022-11-23 03:11:46,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:11:51,254 INFO L130 PetriNetUnfolder]: 5291/9802 cut-off events. [2022-11-23 03:11:51,254 INFO L131 PetriNetUnfolder]: For 206841/207317 co-relation queries the response was YES. [2022-11-23 03:11:51,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88485 conditions, 9802 events. 5291/9802 cut-off events. For 206841/207317 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 74987 event pairs, 477 based on Foata normal form. 297/10039 useless extension candidates. Maximal degree in co-relation 88124. Up to 6321 conditions per place. [2022-11-23 03:11:51,390 INFO L137 encePairwiseOnDemand]: 371/379 looper letters, 718 selfloop transitions, 60 changer transitions 179/1002 dead transitions. [2022-11-23 03:11:51,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1002 transitions, 21875 flow [2022-11-23 03:11:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 03:11:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 03:11:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1442 transitions. [2022-11-23 03:11:51,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42274992670771033 [2022-11-23 03:11:51,393 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1442 transitions. [2022-11-23 03:11:51,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1442 transitions. [2022-11-23 03:11:51,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:11:51,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1442 transitions. [2022-11-23 03:11:51,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.22222222222223) internal successors, (1442), 9 states have internal predecessors, (1442), 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) [2022-11-23 03:11:51,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 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) [2022-11-23 03:11:51,401 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 379.0) internal successors, (3790), 10 states have internal predecessors, (3790), 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) [2022-11-23 03:11:51,401 INFO L175 Difference]: Start difference. First operand has 274 places, 999 transitions, 19985 flow. Second operand 9 states and 1442 transitions. [2022-11-23 03:11:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1002 transitions, 21875 flow [2022-11-23 03:11:53,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 1002 transitions, 21715 flow, removed 25 selfloop flow, removed 3 redundant places. [2022-11-23 03:11:53,130 INFO L231 Difference]: Finished difference. Result has 275 places, 735 transitions, 14644 flow [2022-11-23 03:11:53,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=16678, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14644, PETRI_PLACES=275, PETRI_TRANSITIONS=735} [2022-11-23 03:11:53,131 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 251 predicate places. [2022-11-23 03:11:53,131 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 735 transitions, 14644 flow [2022-11-23 03:11:53,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 157.46666666666667) internal successors, (2362), 15 states have internal predecessors, (2362), 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) [2022-11-23 03:11:53,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:11:53,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:53,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:11:53,339 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:11:53,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:53,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1734531238, now seen corresponding path program 9 times [2022-11-23 03:11:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:11:53,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553097966] [2022-11-23 03:11:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:11:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:11:53,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:11:53,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553097966] [2022-11-23 03:11:53,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553097966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:53,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038880249] [2022-11-23 03:11:53,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:11:53,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:11:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:11:53,539 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:11:53,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:11:53,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 03:11:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:11:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:11:53,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:11:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:11:54,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:11:54,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:11:54,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038880249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:11:54,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:11:54,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-23 03:11:54,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246600762] [2022-11-23 03:11:54,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:11:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:11:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:11:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:11:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:11:54,449 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 379 [2022-11-23 03:11:54,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 735 transitions, 14644 flow. Second operand has 12 states, 12 states have (on average 158.58333333333334) internal successors, (1903), 12 states have internal predecessors, (1903), 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) [2022-11-23 03:11:54,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:11:54,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 379 [2022-11-23 03:11:54,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:11:56,565 INFO L130 PetriNetUnfolder]: 3477/6363 cut-off events. [2022-11-23 03:11:56,565 INFO L131 PetriNetUnfolder]: For 128882/129041 co-relation queries the response was YES. [2022-11-23 03:11:56,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57631 conditions, 6363 events. 3477/6363 cut-off events. For 128882/129041 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 44610 event pairs, 1193 based on Foata normal form. 146/6475 useless extension candidates. Maximal degree in co-relation 57474. Up to 4652 conditions per place. [2022-11-23 03:11:56,628 INFO L137 encePairwiseOnDemand]: 375/379 looper letters, 346 selfloop transitions, 3 changer transitions 252/624 dead transitions. [2022-11-23 03:11:56,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 624 transitions, 13850 flow [2022-11-23 03:11:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:11:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:11:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 975 transitions. [2022-11-23 03:11:56,630 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4287598944591029 [2022-11-23 03:11:56,630 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 975 transitions. [2022-11-23 03:11:56,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 975 transitions. [2022-11-23 03:11:56,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:11:56,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 975 transitions. [2022-11-23 03:11:56,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 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) [2022-11-23 03:11:56,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:56,633 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 379.0) internal successors, (2653), 7 states have internal predecessors, (2653), 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) [2022-11-23 03:11:56,633 INFO L175 Difference]: Start difference. First operand has 275 places, 735 transitions, 14644 flow. Second operand 6 states and 975 transitions. [2022-11-23 03:11:56,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 624 transitions, 13850 flow [2022-11-23 03:11:57,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 624 transitions, 13416 flow, removed 31 selfloop flow, removed 16 redundant places. [2022-11-23 03:11:57,691 INFO L231 Difference]: Finished difference. Result has 233 places, 372 transitions, 7277 flow [2022-11-23 03:11:57,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=379, PETRI_DIFFERENCE_MINUEND_FLOW=11759, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7277, PETRI_PLACES=233, PETRI_TRANSITIONS=372} [2022-11-23 03:11:57,693 INFO L288 CegarLoopForPetriNet]: 24 programPoint places, 209 predicate places. [2022-11-23 03:11:57,693 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 372 transitions, 7277 flow [2022-11-23 03:11:57,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.58333333333334) internal successors, (1903), 12 states have internal predecessors, (1903), 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) [2022-11-23 03:11:57,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:11:57,693 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:11:57,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:11:57,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 03:11:57,900 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-23 03:11:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:11:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 990693790, now seen corresponding path program 10 times [2022-11-23 03:11:57,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:11:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403590121] [2022-11-23 03:11:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:11:57,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:11:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:11:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 03:11:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:11:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403590121] [2022-11-23 03:11:59,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403590121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:11:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507200748] [2022-11-23 03:11:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:11:59,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:11:59,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:11:59,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:11:59,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70c99fa5-981c-4926-9420-bf2816f980a7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:11:59,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 03:11:59,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:11:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 03:11:59,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:12:01,005 INFO L321 Elim1Store]: treesize reduction 41, result has 56.8 percent of original size [2022-11-23 03:12:01,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 69 [2022-11-23 03:12:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 03:12:01,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:12:06,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:12:06,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 235 treesize of output 1307