./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.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_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/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_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/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_080e2d29-79b7-4850-8264-9fd030184806/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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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 02:52:46,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:52:46,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:52:46,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:52:46,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:52:46,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:52:46,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:52:46,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:52:46,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:52:46,600 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:52:46,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:52:46,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:52:46,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:52:46,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:52:46,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:52:46,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:52:46,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:52:46,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:52:46,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:52:46,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:52:46,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:52:46,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:52:46,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:52:46,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:52:46,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:52:46,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:52:46,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:52:46,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:52:46,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:52:46,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:52:46,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:52:46,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:52:46,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:52:46,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:52:46,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:52:46,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:52:46,657 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:52:46,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:52:46,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:52:46,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:52:46,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:52:46,661 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:52:46,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:52:46,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:52:46,704 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:52:46,704 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:52:46,705 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:52:46,705 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:52:46,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:52:46,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:52:46,706 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:52:46,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:52:46,708 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:52:46,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:52:46,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:52:46,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:52:46,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:52:46,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:52:46,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:52:46,710 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:52:46,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:52:46,710 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:52:46,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:52:46,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:52:46,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:52:46,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:52:46,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:52:46,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:52:46,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:52:46,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:52:46,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:52:46,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:52:46,713 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:52:46,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:52:46,714 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:52:46,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:52:46,714 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_080e2d29-79b7-4850-8264-9fd030184806/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-23 02:52:47,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:52:47,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:52:47,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:52:47,110 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:52:47,111 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:52:47,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-23 02:52:50,247 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:52:50,460 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:52:50,460 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-23 02:52:50,470 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/data/6cc9100a3/21f218c4f6a84f5686c136b7567393f9/FLAGdfc606649 [2022-11-23 02:52:50,490 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/data/6cc9100a3/21f218c4f6a84f5686c136b7567393f9 [2022-11-23 02:52:50,494 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:52:50,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:52:50,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:52:50,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:52:50,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:52:50,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ffb52aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50, skipping insertion in model container [2022-11-23 02:52:50,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:52:50,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:52:50,753 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_080e2d29-79b7-4850-8264-9fd030184806/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-23 02:52:50,765 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:52:50,778 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:52:50,807 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_080e2d29-79b7-4850-8264-9fd030184806/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-23 02:52:50,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:52:50,829 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:52:50,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50 WrapperNode [2022-11-23 02:52:50,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:52:50,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:52:50,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:52:50,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:52:50,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,875 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-11-23 02:52:50,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:52:50,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:52:50,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:52:50,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:52:50,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,888 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:52:50,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:52:50,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:52:50,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:52:50,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (1/1) ... [2022-11-23 02:52:50,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:52:50,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:52:50,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:52:50,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:52:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:52:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:52:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:52:50,998 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:52:50,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:52:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 02:52:50,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 02:52:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:52:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:52:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:52:50,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:52:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:52:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:52:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:52:51,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:52:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:52:51,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:52:51,002 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 02:52:51,120 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:52:51,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:52:51,581 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:52:51,650 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:52:51,651 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 02:52:51,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:51 BoogieIcfgContainer [2022-11-23 02:52:51,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:52:51,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:52:51,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:52:51,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:52:51,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:52:50" (1/3) ... [2022-11-23 02:52:51,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a486c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:51, skipping insertion in model container [2022-11-23 02:52:51,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:52:50" (2/3) ... [2022-11-23 02:52:51,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a486c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:51, skipping insertion in model container [2022-11-23 02:52:51,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:51" (3/3) ... [2022-11-23 02:52:51,665 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-23 02:52:51,674 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:52:51,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:52:51,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:52:51,691 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:52:51,799 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 02:52:51,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2022-11-23 02:52:51,974 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-11-23 02:52:51,975 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:52:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-11-23 02:52:51,983 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2022-11-23 02:52:51,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2022-11-23 02:52:51,996 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:52:52,052 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 139 transitions, 296 flow [2022-11-23 02:52:52,055 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 139 transitions, 296 flow [2022-11-23 02:52:52,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 139 transitions, 296 flow [2022-11-23 02:52:52,125 INFO L130 PetriNetUnfolder]: 12/139 cut-off events. [2022-11-23 02:52:52,125 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:52:52,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 12/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-11-23 02:52:52,129 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-11-23 02:52:59,305 INFO L134 LiptonReduction]: Checked pairs total: 1518 [2022-11-23 02:52:59,306 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-23 02:52:59,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:52:59,341 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;@5e11a61f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:52:59,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:52:59,349 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-23 02:52:59,349 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:52:59,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:59,350 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 02:52:59,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:52:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2053952214, now seen corresponding path program 1 times [2022-11-23 02:52:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:52:59,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237489197] [2022-11-23 02:52:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:52:59,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:52:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:00,098 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 02:53:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237489197] [2022-11-23 02:53:00,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237489197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:53:00,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:53:00,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:53:00,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980346465] [2022-11-23 02:53:00,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:53:00,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:53:00,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:00,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:53:00,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:53:00,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2022-11-23 02:53:00,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 02:53:00,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:00,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2022-11-23 02:53:00,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:00,373 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2022-11-23 02:53:00,373 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-23 02:53:00,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1109 event pairs, 117 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2022-11-23 02:53:00,378 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-23 02:53:00,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2022-11-23 02:53:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:53:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:53:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-11-23 02:53:00,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46781609195402296 [2022-11-23 02:53:00,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-11-23 02:53:00,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-11-23 02:53:00,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:00,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-11-23 02:53:00,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 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 02:53:00,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 02:53:00,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 02:53:00,419 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 407 transitions. [2022-11-23 02:53:00,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2022-11-23 02:53:00,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 02:53:00,430 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-11-23 02:53:00,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-11-23 02:53:00,442 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-23 02:53:00,443 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-11-23 02:53:00,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 02:53:00,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:00,444 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 02:53:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:53:00,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash -294000722, now seen corresponding path program 1 times [2022-11-23 02:53:00,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:00,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125604396] [2022-11-23 02:53:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:00,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:00,643 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 02:53:00,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:00,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125604396] [2022-11-23 02:53:00,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125604396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47231086] [2022-11-23 02:53:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:00,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:00,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:00,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:53:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:53:00,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:00,876 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 02:53:00,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:00,917 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 02:53:00,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47231086] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:00,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:53:00,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-23 02:53:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928015937] [2022-11-23 02:53:00,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:53:00,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:53:00,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:00,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:53:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:53:01,020 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-11-23 02:53:01,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 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 02:53:01,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:01,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-11-23 02:53:01,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:01,205 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2022-11-23 02:53:01,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:53:01,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1396 event pairs, 49 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2022-11-23 02:53:01,210 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-11-23 02:53:01,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2022-11-23 02:53:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:53:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:53:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-11-23 02:53:01,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4475862068965517 [2022-11-23 02:53:01,215 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-11-23 02:53:01,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-11-23 02:53:01,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:01,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-11-23 02:53:01,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:01,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 02:53:01,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 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 02:53:01,228 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 649 transitions. [2022-11-23 02:53:01,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2022-11-23 02:53:01,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:53:01,232 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2022-11-23 02:53:01,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-23 02:53:01,236 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2022-11-23 02:53:01,237 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2022-11-23 02:53:01,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 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 02:53:01,238 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:01,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:01,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:01,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:01,446 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1887343049, now seen corresponding path program 1 times [2022-11-23 02:53:01,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:01,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74476968] [2022-11-23 02:53:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:01,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:01,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74476968] [2022-11-23 02:53:01,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74476968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:01,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633193449] [2022-11-23 02:53:01,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:01,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:01,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:01,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:53:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:01,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:53:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:02,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:02,134 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 02:53:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633193449] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:02,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:53:02,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2022-11-23 02:53:02,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477447175] [2022-11-23 02:53:02,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:53:02,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:53:02,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:02,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:53:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:53:02,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:53:02,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 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 02:53:02,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:02,314 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:53:02,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:02,631 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2022-11-23 02:53:02,631 INFO L131 PetriNetUnfolder]: For 106/151 co-relation queries the response was YES. [2022-11-23 02:53:02,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 106/151 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2015 event pairs, 138 based on Foata normal form. 45/485 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2022-11-23 02:53:02,642 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2022-11-23 02:53:02,642 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2022-11-23 02:53:02,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:53:02,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:53:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 877 transitions. [2022-11-23 02:53:02,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320197044334975 [2022-11-23 02:53:02,647 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 877 transitions. [2022-11-23 02:53:02,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 877 transitions. [2022-11-23 02:53:02,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:02,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 877 transitions. [2022-11-23 02:53:02,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 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 02:53:02,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 02:53:02,658 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 02:53:02,658 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 877 transitions. [2022-11-23 02:53:02,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2022-11-23 02:53:02,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-23 02:53:02,663 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2022-11-23 02:53:02,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-23 02:53:02,665 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-11-23 02:53:02,666 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2022-11-23 02:53:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 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 02:53:02,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:02,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:02,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:02,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:02,879 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:02,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash 752428755, now seen corresponding path program 2 times [2022-11-23 02:53:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:02,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551339195] [2022-11-23 02:53:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:03,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:03,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551339195] [2022-11-23 02:53:03,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551339195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:03,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914233202] [2022-11-23 02:53:03,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:53:03,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:03,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:03,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:53:03,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:53:03,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:53:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:03,382 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 02:53:03,383 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:53:03,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914233202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:53:03,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:53:03,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-23 02:53:03,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742002965] [2022-11-23 02:53:03,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:53:03,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:53:03,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:53:03,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:53:03,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2022-11-23 02:53:03,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 02:53:03,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:03,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2022-11-23 02:53:03,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:03,570 INFO L130 PetriNetUnfolder]: 325/477 cut-off events. [2022-11-23 02:53:03,570 INFO L131 PetriNetUnfolder]: For 237/267 co-relation queries the response was YES. [2022-11-23 02:53:03,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 477 events. 325/477 cut-off events. For 237/267 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1501 event pairs, 123 based on Foata normal form. 56/426 useless extension candidates. Maximal degree in co-relation 1357. Up to 346 conditions per place. [2022-11-23 02:53:03,574 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-23 02:53:03,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2022-11-23 02:53:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:53:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:53:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2022-11-23 02:53:03,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4663793103448276 [2022-11-23 02:53:03,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2022-11-23 02:53:03,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2022-11-23 02:53:03,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:03,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2022-11-23 02:53:03,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 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 02:53:03,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 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 02:53:03,582 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 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 02:53:03,582 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 541 transitions. [2022-11-23 02:53:03,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2022-11-23 02:53:03,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 02:53:03,585 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2022-11-23 02:53:03,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-11-23 02:53:03,586 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-11-23 02:53:03,587 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2022-11-23 02:53:03,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 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 02:53:03,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:03,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:03,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:03,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:03,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:03,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:03,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1630751154, now seen corresponding path program 1 times [2022-11-23 02:53:03,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:03,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100038648] [2022-11-23 02:53:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:05,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:05,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100038648] [2022-11-23 02:53:05,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100038648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:05,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249133621] [2022-11-23 02:53:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:05,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:05,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:05,111 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:05,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:53:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:05,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 02:53:05,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:05,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:53:05,550 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 35 treesize of output 33 [2022-11-23 02:53:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:53:05,670 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 35 treesize of output 33 [2022-11-23 02:53:05,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:05,876 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 69 treesize of output 43 [2022-11-23 02:53:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:06,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:07,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:07,326 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 275 treesize of output 263 [2022-11-23 02:53:07,339 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 204 treesize of output 192 [2022-11-23 02:53:07,360 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 192 treesize of output 186 [2022-11-23 02:53:07,378 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 186 treesize of output 162 [2022-11-23 02:53:07,394 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 162 treesize of output 150 [2022-11-23 02:53:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:08,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249133621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:08,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:08,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 32 [2022-11-23 02:53:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155800181] [2022-11-23 02:53:08,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 02:53:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 02:53:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=957, Unknown=7, NotChecked=0, Total=1122 [2022-11-23 02:53:12,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 290 [2022-11-23 02:53:12,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 34 states, 34 states have (on average 82.79411764705883) internal successors, (2815), 34 states have internal predecessors, (2815), 0 states have call successors, (0), 0 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 02:53:12,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:12,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 290 [2022-11-23 02:53:12,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:17,507 INFO L130 PetriNetUnfolder]: 1391/2042 cut-off events. [2022-11-23 02:53:17,507 INFO L131 PetriNetUnfolder]: For 1757/1757 co-relation queries the response was YES. [2022-11-23 02:53:17,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 2042 events. 1391/2042 cut-off events. For 1757/1757 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8371 event pairs, 48 based on Foata normal form. 2/1718 useless extension candidates. Maximal degree in co-relation 4756. Up to 969 conditions per place. [2022-11-23 02:53:17,534 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 195 selfloop transitions, 126 changer transitions 6/327 dead transitions. [2022-11-23 02:53:17,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 327 transitions, 1872 flow [2022-11-23 02:53:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 02:53:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-23 02:53:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3386 transitions. [2022-11-23 02:53:17,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30725952813067153 [2022-11-23 02:53:17,555 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3386 transitions. [2022-11-23 02:53:17,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3386 transitions. [2022-11-23 02:53:17,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:17,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3386 transitions. [2022-11-23 02:53:17,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 89.10526315789474) internal successors, (3386), 38 states have internal predecessors, (3386), 0 states have call successors, (0), 0 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 02:53:17,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 290.0) internal successors, (11310), 39 states have internal predecessors, (11310), 0 states have call successors, (0), 0 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 02:53:17,609 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 290.0) internal successors, (11310), 39 states have internal predecessors, (11310), 0 states have call successors, (0), 0 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 02:53:17,610 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 38 states and 3386 transitions. [2022-11-23 02:53:17,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 327 transitions, 1872 flow [2022-11-23 02:53:17,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 327 transitions, 1758 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-23 02:53:17,639 INFO L231 Difference]: Finished difference. Result has 79 places, 160 transitions, 978 flow [2022-11-23 02:53:17,640 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=978, PETRI_PLACES=79, PETRI_TRANSITIONS=160} [2022-11-23 02:53:17,643 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2022-11-23 02:53:17,644 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 160 transitions, 978 flow [2022-11-23 02:53:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 82.79411764705883) internal successors, (2815), 34 states have internal predecessors, (2815), 0 states have call successors, (0), 0 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 02:53:17,646 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:17,646 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:17,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:17,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash -12330040, now seen corresponding path program 2 times [2022-11-23 02:53:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250506120] [2022-11-23 02:53:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:17,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:18,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250506120] [2022-11-23 02:53:18,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250506120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090795441] [2022-11-23 02:53:18,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:53:18,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:18,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:18,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:53:18,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:53:18,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:18,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 02:53:18,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:53:19,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:19,400 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 66 treesize of output 39 [2022-11-23 02:53:19,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:19,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:19,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:19,607 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 87 treesize of output 51 [2022-11-23 02:53:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:19,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090795441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:19,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:19,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2022-11-23 02:53:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603786839] [2022-11-23 02:53:19,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:53:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:53:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:53:20,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 290 [2022-11-23 02:53:20,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 160 transitions, 978 flow. Second operand has 23 states, 23 states have (on average 111.78260869565217) internal successors, (2571), 23 states have internal predecessors, (2571), 0 states have call successors, (0), 0 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 02:53:20,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:20,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 290 [2022-11-23 02:53:20,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:21,933 INFO L130 PetriNetUnfolder]: 1579/2325 cut-off events. [2022-11-23 02:53:21,933 INFO L131 PetriNetUnfolder]: For 3812/3889 co-relation queries the response was YES. [2022-11-23 02:53:21,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8767 conditions, 2325 events. 1579/2325 cut-off events. For 3812/3889 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10309 event pairs, 208 based on Foata normal form. 28/2271 useless extension candidates. Maximal degree in co-relation 8538. Up to 1727 conditions per place. [2022-11-23 02:53:21,954 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 157 selfloop transitions, 74 changer transitions 4/249 dead transitions. [2022-11-23 02:53:21,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 249 transitions, 1805 flow [2022-11-23 02:53:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:53:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:53:21,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1426 transitions. [2022-11-23 02:53:21,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40977011494252874 [2022-11-23 02:53:21,960 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1426 transitions. [2022-11-23 02:53:21,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1426 transitions. [2022-11-23 02:53:21,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:21,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1426 transitions. [2022-11-23 02:53:21,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 118.83333333333333) internal successors, (1426), 12 states have internal predecessors, (1426), 0 states have call successors, (0), 0 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 02:53:21,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 02:53:21,973 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 02:53:21,973 INFO L175 Difference]: Start difference. First operand has 79 places, 160 transitions, 978 flow. Second operand 12 states and 1426 transitions. [2022-11-23 02:53:21,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 249 transitions, 1805 flow [2022-11-23 02:53:21,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 249 transitions, 1771 flow, removed 16 selfloop flow, removed 1 redundant places. [2022-11-23 02:53:21,997 INFO L231 Difference]: Finished difference. Result has 93 places, 189 transitions, 1322 flow [2022-11-23 02:53:21,997 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1322, PETRI_PLACES=93, PETRI_TRANSITIONS=189} [2022-11-23 02:53:22,000 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 63 predicate places. [2022-11-23 02:53:22,001 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 189 transitions, 1322 flow [2022-11-23 02:53:22,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.78260869565217) internal successors, (2571), 23 states have internal predecessors, (2571), 0 states have call successors, (0), 0 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 02:53:22,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:22,002 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:22,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:22,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:22,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1653968088, now seen corresponding path program 3 times [2022-11-23 02:53:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:22,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584396147] [2022-11-23 02:53:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:22,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584396147] [2022-11-23 02:53:22,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584396147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387963794] [2022-11-23 02:53:22,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:53:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:22,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:53:23,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:53:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 02:53:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:23,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:23,544 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 79 treesize of output 81 [2022-11-23 02:53:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:23,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:24,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:24,098 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 87 treesize of output 51 [2022-11-23 02:53:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:24,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387963794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:24,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:24,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-23 02:53:24,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858426595] [2022-11-23 02:53:24,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:24,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 02:53:24,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:24,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 02:53:24,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-11-23 02:53:25,579 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:53:25,582 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 189 transitions, 1322 flow. Second operand has 26 states, 26 states have (on average 106.07692307692308) internal successors, (2758), 26 states have internal predecessors, (2758), 0 states have call successors, (0), 0 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 02:53:25,582 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:25,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:53:25,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:27,710 INFO L130 PetriNetUnfolder]: 1870/2792 cut-off events. [2022-11-23 02:53:27,711 INFO L131 PetriNetUnfolder]: For 6347/6347 co-relation queries the response was YES. [2022-11-23 02:53:27,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11580 conditions, 2792 events. 1870/2792 cut-off events. For 6347/6347 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12391 event pairs, 366 based on Foata normal form. 1/2793 useless extension candidates. Maximal degree in co-relation 11348. Up to 2445 conditions per place. [2022-11-23 02:53:27,738 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 182 selfloop transitions, 131 changer transitions 6/319 dead transitions. [2022-11-23 02:53:27,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 319 transitions, 2752 flow [2022-11-23 02:53:27,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:53:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:53:27,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1875 transitions. [2022-11-23 02:53:27,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3803245436105477 [2022-11-23 02:53:27,745 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1875 transitions. [2022-11-23 02:53:27,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1875 transitions. [2022-11-23 02:53:27,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:27,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1875 transitions. [2022-11-23 02:53:27,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 110.29411764705883) internal successors, (1875), 17 states have internal predecessors, (1875), 0 states have call successors, (0), 0 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 02:53:27,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 02:53:27,764 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 02:53:27,764 INFO L175 Difference]: Start difference. First operand has 93 places, 189 transitions, 1322 flow. Second operand 17 states and 1875 transitions. [2022-11-23 02:53:27,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 319 transitions, 2752 flow [2022-11-23 02:53:27,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 319 transitions, 2710 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-23 02:53:27,808 INFO L231 Difference]: Finished difference. Result has 115 places, 266 transitions, 2336 flow [2022-11-23 02:53:27,809 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2336, PETRI_PLACES=115, PETRI_TRANSITIONS=266} [2022-11-23 02:53:27,809 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2022-11-23 02:53:27,810 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 266 transitions, 2336 flow [2022-11-23 02:53:27,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 106.07692307692308) internal successors, (2758), 26 states have internal predecessors, (2758), 0 states have call successors, (0), 0 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 02:53:27,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:27,811 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:27,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:28,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 02:53:28,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:28,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:28,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1607677752, now seen corresponding path program 4 times [2022-11-23 02:53:28,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:28,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594453555] [2022-11-23 02:53:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:28,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594453555] [2022-11-23 02:53:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594453555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:28,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121623923] [2022-11-23 02:53:28,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:53:28,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:28,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:28,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:53:28,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:53:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:28,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:53:28,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:29,370 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:29,370 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 79 treesize of output 81 [2022-11-23 02:53:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:29,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:29,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:29,958 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 87 treesize of output 51 [2022-11-23 02:53:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:30,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121623923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:30,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:30,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 23 [2022-11-23 02:53:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517150607] [2022-11-23 02:53:30,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:30,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:53:30,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:30,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:53:30,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:53:31,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:53:31,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 266 transitions, 2336 flow. Second operand has 25 states, 25 states have (on average 107.44) internal successors, (2686), 25 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:53:31,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:31,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:53:31,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:35,046 INFO L130 PetriNetUnfolder]: 3372/5122 cut-off events. [2022-11-23 02:53:35,047 INFO L131 PetriNetUnfolder]: For 17044/17044 co-relation queries the response was YES. [2022-11-23 02:53:35,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23321 conditions, 5122 events. 3372/5122 cut-off events. For 17044/17044 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 27066 event pairs, 163 based on Foata normal form. 5/5127 useless extension candidates. Maximal degree in co-relation 22999. Up to 2204 conditions per place. [2022-11-23 02:53:35,090 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 321 selfloop transitions, 309 changer transitions 15/645 dead transitions. [2022-11-23 02:53:35,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 645 transitions, 6149 flow [2022-11-23 02:53:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 02:53:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-23 02:53:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4224 transitions. [2022-11-23 02:53:35,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3936626281453868 [2022-11-23 02:53:35,102 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4224 transitions. [2022-11-23 02:53:35,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4224 transitions. [2022-11-23 02:53:35,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:35,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4224 transitions. [2022-11-23 02:53:35,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 114.16216216216216) internal successors, (4224), 37 states have internal predecessors, (4224), 0 states have call successors, (0), 0 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 02:53:35,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 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 02:53:35,133 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 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 02:53:35,133 INFO L175 Difference]: Start difference. First operand has 115 places, 266 transitions, 2336 flow. Second operand 37 states and 4224 transitions. [2022-11-23 02:53:35,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 645 transitions, 6149 flow [2022-11-23 02:53:35,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 645 transitions, 5998 flow, removed 73 selfloop flow, removed 2 redundant places. [2022-11-23 02:53:35,237 INFO L231 Difference]: Finished difference. Result has 171 places, 426 transitions, 4781 flow [2022-11-23 02:53:35,238 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4781, PETRI_PLACES=171, PETRI_TRANSITIONS=426} [2022-11-23 02:53:35,239 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 141 predicate places. [2022-11-23 02:53:35,239 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 426 transitions, 4781 flow [2022-11-23 02:53:35,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.44) internal successors, (2686), 25 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:53:35,241 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:35,241 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:35,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:35,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:35,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2088844, now seen corresponding path program 5 times [2022-11-23 02:53:35,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:35,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21484716] [2022-11-23 02:53:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:35,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:36,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21484716] [2022-11-23 02:53:36,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21484716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:36,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296438600] [2022-11-23 02:53:36,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:53:36,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:36,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:53:36,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:53:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:53:36,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:36,876 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 57 treesize of output 33 [2022-11-23 02:53:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:36,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:37,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:37,115 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 87 treesize of output 51 [2022-11-23 02:53:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:37,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296438600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:37,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:37,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2022-11-23 02:53:37,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561518496] [2022-11-23 02:53:37,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:53:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:53:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:53:38,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2022-11-23 02:53:38,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 426 transitions, 4781 flow. Second operand has 25 states, 25 states have (on average 108.48) internal successors, (2712), 25 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 02:53:38,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:38,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2022-11-23 02:53:38,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:41,526 INFO L130 PetriNetUnfolder]: 3635/5571 cut-off events. [2022-11-23 02:53:41,526 INFO L131 PetriNetUnfolder]: For 38031/38031 co-relation queries the response was YES. [2022-11-23 02:53:41,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30898 conditions, 5571 events. 3635/5571 cut-off events. For 38031/38031 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 30187 event pairs, 446 based on Foata normal form. 6/5577 useless extension candidates. Maximal degree in co-relation 30509. Up to 4148 conditions per place. [2022-11-23 02:53:41,589 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 323 selfloop transitions, 243 changer transitions 4/570 dead transitions. [2022-11-23 02:53:41,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 570 transitions, 7026 flow [2022-11-23 02:53:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:53:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:53:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2717 transitions. [2022-11-23 02:53:41,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3903735632183908 [2022-11-23 02:53:41,596 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2717 transitions. [2022-11-23 02:53:41,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2717 transitions. [2022-11-23 02:53:41,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:41,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2717 transitions. [2022-11-23 02:53:41,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 113.20833333333333) internal successors, (2717), 24 states have internal predecessors, (2717), 0 states have call successors, (0), 0 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 02:53:41,612 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 02:53:41,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 290.0) internal successors, (7250), 25 states have internal predecessors, (7250), 0 states have call successors, (0), 0 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 02:53:41,615 INFO L175 Difference]: Start difference. First operand has 171 places, 426 transitions, 4781 flow. Second operand 24 states and 2717 transitions. [2022-11-23 02:53:41,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 570 transitions, 7026 flow [2022-11-23 02:53:41,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 570 transitions, 6524 flow, removed 192 selfloop flow, removed 6 redundant places. [2022-11-23 02:53:41,884 INFO L231 Difference]: Finished difference. Result has 195 places, 483 transitions, 5661 flow [2022-11-23 02:53:41,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=4347, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5661, PETRI_PLACES=195, PETRI_TRANSITIONS=483} [2022-11-23 02:53:41,885 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2022-11-23 02:53:41,886 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 483 transitions, 5661 flow [2022-11-23 02:53:41,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.48) internal successors, (2712), 25 states have internal predecessors, (2712), 0 states have call successors, (0), 0 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 02:53:41,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:41,887 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:41,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:42,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 547443084, now seen corresponding path program 6 times [2022-11-23 02:53:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:42,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934880746] [2022-11-23 02:53:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:42,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934880746] [2022-11-23 02:53:42,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934880746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:42,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269261449] [2022-11-23 02:53:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:53:42,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:42,852 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:42,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:53:43,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 02:53:43,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:43,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:53:43,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:43,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:43,607 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 79 treesize of output 81 [2022-11-23 02:53:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:44,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:44,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:44,308 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 75 treesize of output 49 [2022-11-23 02:53:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:53:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269261449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:44,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:44,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 23 [2022-11-23 02:53:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257779578] [2022-11-23 02:53:44,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:44,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:53:44,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:53:44,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:53:46,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:53:46,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 483 transitions, 5661 flow. Second operand has 25 states, 25 states have (on average 107.44) internal successors, (2686), 25 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:53:46,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:46,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:53:46,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:51,080 INFO L130 PetriNetUnfolder]: 4079/6274 cut-off events. [2022-11-23 02:53:51,080 INFO L131 PetriNetUnfolder]: For 49636/49636 co-relation queries the response was YES. [2022-11-23 02:53:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35845 conditions, 6274 events. 4079/6274 cut-off events. For 49636/49636 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34916 event pairs, 843 based on Foata normal form. 3/6277 useless extension candidates. Maximal degree in co-relation 35351. Up to 5379 conditions per place. [2022-11-23 02:53:51,142 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 416 selfloop transitions, 260 changer transitions 9/685 dead transitions. [2022-11-23 02:53:51,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 685 transitions, 8960 flow [2022-11-23 02:53:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 02:53:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-23 02:53:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3703 transitions. [2022-11-23 02:53:51,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3869383490073145 [2022-11-23 02:53:51,149 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3703 transitions. [2022-11-23 02:53:51,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3703 transitions. [2022-11-23 02:53:51,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:51,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3703 transitions. [2022-11-23 02:53:51,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 112.21212121212122) internal successors, (3703), 33 states have internal predecessors, (3703), 0 states have call successors, (0), 0 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 02:53:51,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 290.0) internal successors, (9860), 34 states have internal predecessors, (9860), 0 states have call successors, (0), 0 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 02:53:51,170 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 290.0) internal successors, (9860), 34 states have internal predecessors, (9860), 0 states have call successors, (0), 0 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 02:53:51,171 INFO L175 Difference]: Start difference. First operand has 195 places, 483 transitions, 5661 flow. Second operand 33 states and 3703 transitions. [2022-11-23 02:53:51,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 685 transitions, 8960 flow [2022-11-23 02:53:51,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 685 transitions, 8704 flow, removed 89 selfloop flow, removed 5 redundant places. [2022-11-23 02:53:51,536 INFO L231 Difference]: Finished difference. Result has 235 places, 575 transitions, 7373 flow [2022-11-23 02:53:51,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7373, PETRI_PLACES=235, PETRI_TRANSITIONS=575} [2022-11-23 02:53:51,537 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2022-11-23 02:53:51,537 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 575 transitions, 7373 flow [2022-11-23 02:53:51,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.44) internal successors, (2686), 25 states have internal predecessors, (2686), 0 states have call successors, (0), 0 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 02:53:51,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:51,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:51,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:51,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:53:51,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -205212748, now seen corresponding path program 7 times [2022-11-23 02:53:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:51,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606791834] [2022-11-23 02:53:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:51,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606791834] [2022-11-23 02:53:52,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606791834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:52,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320068332] [2022-11-23 02:53:52,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:53:52,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:52,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:52,616 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:52,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:53:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:53:52,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:53,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:53,224 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 79 treesize of output 81 [2022-11-23 02:53:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:53,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:53:53,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:53:53,754 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 87 treesize of output 51 [2022-11-23 02:53:54,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:54,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320068332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:53:54,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:53:54,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 20 [2022-11-23 02:53:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381683462] [2022-11-23 02:53:54,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:53:54,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:53:54,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:53:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:53:54,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-23 02:53:55,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 290 [2022-11-23 02:53:55,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 575 transitions, 7373 flow. Second operand has 22 states, 22 states have (on average 113.36363636363636) internal successors, (2494), 22 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 02:53:55,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:55,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 290 [2022-11-23 02:53:55,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:57,986 INFO L130 PetriNetUnfolder]: 4036/6232 cut-off events. [2022-11-23 02:53:57,986 INFO L131 PetriNetUnfolder]: For 67864/68127 co-relation queries the response was YES. [2022-11-23 02:53:58,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37992 conditions, 6232 events. 4036/6232 cut-off events. For 67864/68127 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35829 event pairs, 555 based on Foata normal form. 89/6245 useless extension candidates. Maximal degree in co-relation 37434. Up to 4538 conditions per place. [2022-11-23 02:53:58,082 INFO L137 encePairwiseOnDemand]: 281/290 looper letters, 334 selfloop transitions, 274 changer transitions 4/637 dead transitions. [2022-11-23 02:53:58,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 637 transitions, 9058 flow [2022-11-23 02:53:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 02:53:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 02:53:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1546 transitions. [2022-11-23 02:53:58,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41007957559681696 [2022-11-23 02:53:58,088 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1546 transitions. [2022-11-23 02:53:58,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1546 transitions. [2022-11-23 02:53:58,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:58,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1546 transitions. [2022-11-23 02:53:58,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.92307692307692) internal successors, (1546), 13 states have internal predecessors, (1546), 0 states have call successors, (0), 0 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 02:53:58,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 02:53:58,103 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 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 02:53:58,103 INFO L175 Difference]: Start difference. First operand has 235 places, 575 transitions, 7373 flow. Second operand 13 states and 1546 transitions. [2022-11-23 02:53:58,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 637 transitions, 9058 flow [2022-11-23 02:53:58,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 637 transitions, 8559 flow, removed 231 selfloop flow, removed 4 redundant places. [2022-11-23 02:53:58,616 INFO L231 Difference]: Finished difference. Result has 246 places, 590 transitions, 7781 flow [2022-11-23 02:53:58,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=6892, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7781, PETRI_PLACES=246, PETRI_TRANSITIONS=590} [2022-11-23 02:53:58,617 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2022-11-23 02:53:58,617 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 590 transitions, 7781 flow [2022-11-23 02:53:58,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 113.36363636363636) internal successors, (2494), 22 states have internal predecessors, (2494), 0 states have call successors, (0), 0 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 02:53:58,619 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:58,619 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:58,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:58,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:58,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:53:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:58,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1160217722, now seen corresponding path program 8 times [2022-11-23 02:53:58,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:53:58,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309186668] [2022-11-23 02:53:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:58,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:53:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:59,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:53:59,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309186668] [2022-11-23 02:53:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309186668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:53:59,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819053770] [2022-11-23 02:53:59,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:53:59,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:53:59,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:53:59,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:53:59,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:53:59,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:53:59,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:53:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 02:53:59,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:00,331 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 58 treesize of output 34 [2022-11-23 02:54:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:00,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:00,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:54:00,645 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 75 treesize of output 49 [2022-11-23 02:54:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:00,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819053770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:00,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:00,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-11-23 02:54:00,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350104250] [2022-11-23 02:54:00,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:00,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:54:00,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:00,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:54:00,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:54:02,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:54:02,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 590 transitions, 7781 flow. Second operand has 27 states, 27 states have (on average 107.07407407407408) internal successors, (2891), 27 states have internal predecessors, (2891), 0 states have call successors, (0), 0 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 02:54:02,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:02,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:54:02,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:05,606 INFO L130 PetriNetUnfolder]: 4513/7001 cut-off events. [2022-11-23 02:54:05,606 INFO L131 PetriNetUnfolder]: For 79583/79583 co-relation queries the response was YES. [2022-11-23 02:54:05,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43106 conditions, 7001 events. 4513/7001 cut-off events. For 79583/79583 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40415 event pairs, 987 based on Foata normal form. 2/7003 useless extension candidates. Maximal degree in co-relation 42464. Up to 6232 conditions per place. [2022-11-23 02:54:05,697 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 447 selfloop transitions, 250 changer transitions 6/703 dead transitions. [2022-11-23 02:54:05,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 703 transitions, 10347 flow [2022-11-23 02:54:05,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:54:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:54:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1904 transitions. [2022-11-23 02:54:05,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38620689655172413 [2022-11-23 02:54:05,704 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1904 transitions. [2022-11-23 02:54:05,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1904 transitions. [2022-11-23 02:54:05,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:05,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1904 transitions. [2022-11-23 02:54:05,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 112.0) internal successors, (1904), 17 states have internal predecessors, (1904), 0 states have call successors, (0), 0 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 02:54:05,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 02:54:05,723 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 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 02:54:05,723 INFO L175 Difference]: Start difference. First operand has 246 places, 590 transitions, 7781 flow. Second operand 17 states and 1904 transitions. [2022-11-23 02:54:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 703 transitions, 10347 flow [2022-11-23 02:54:06,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 703 transitions, 10012 flow, removed 55 selfloop flow, removed 9 redundant places. [2022-11-23 02:54:06,338 INFO L231 Difference]: Finished difference. Result has 260 places, 654 transitions, 9010 flow [2022-11-23 02:54:06,339 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9010, PETRI_PLACES=260, PETRI_TRANSITIONS=654} [2022-11-23 02:54:06,339 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2022-11-23 02:54:06,340 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 654 transitions, 9010 flow [2022-11-23 02:54:06,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.07407407407408) internal successors, (2891), 27 states have internal predecessors, (2891), 0 states have call successors, (0), 0 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 02:54:06,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:06,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:06,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:06,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:06,541 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 476554920, now seen corresponding path program 9 times [2022-11-23 02:54:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:06,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401403890] [2022-11-23 02:54:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:07,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401403890] [2022-11-23 02:54:07,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401403890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:07,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45871005] [2022-11-23 02:54:07,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:54:07,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:07,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:07,363 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:07,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:54:07,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:54:07,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:07,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:54:07,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:08,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-11-23 02:54:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:08,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:54:08,360 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 75 treesize of output 49 [2022-11-23 02:54:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45871005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:08,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:08,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2022-11-23 02:54:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226401333] [2022-11-23 02:54:08,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:08,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:54:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:54:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:54:09,641 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 290 [2022-11-23 02:54:09,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 654 transitions, 9010 flow. Second operand has 21 states, 21 states have (on average 113.52380952380952) internal successors, (2384), 21 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:09,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:09,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 290 [2022-11-23 02:54:09,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:12,867 INFO L130 PetriNetUnfolder]: 4430/6938 cut-off events. [2022-11-23 02:54:12,867 INFO L131 PetriNetUnfolder]: For 77772/78063 co-relation queries the response was YES. [2022-11-23 02:54:12,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43723 conditions, 6938 events. 4430/6938 cut-off events. For 77772/78063 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 41562 event pairs, 577 based on Foata normal form. 110/6962 useless extension candidates. Maximal degree in co-relation 43075. Up to 5118 conditions per place. [2022-11-23 02:54:12,945 INFO L137 encePairwiseOnDemand]: 281/290 looper letters, 393 selfloop transitions, 303 changer transitions 6/727 dead transitions. [2022-11-23 02:54:12,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 727 transitions, 11013 flow [2022-11-23 02:54:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:54:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 02:54:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1897 transitions. [2022-11-23 02:54:12,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4088362068965517 [2022-11-23 02:54:12,951 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1897 transitions. [2022-11-23 02:54:12,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1897 transitions. [2022-11-23 02:54:12,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:12,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1897 transitions. [2022-11-23 02:54:12,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 118.5625) internal successors, (1897), 16 states have internal predecessors, (1897), 0 states have call successors, (0), 0 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 02:54:12,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 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 02:54:12,962 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 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 02:54:12,962 INFO L175 Difference]: Start difference. First operand has 260 places, 654 transitions, 9010 flow. Second operand 16 states and 1897 transitions. [2022-11-23 02:54:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 727 transitions, 11013 flow [2022-11-23 02:54:13,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 727 transitions, 10533 flow, removed 139 selfloop flow, removed 7 redundant places. [2022-11-23 02:54:13,531 INFO L231 Difference]: Finished difference. Result has 270 places, 671 transitions, 9443 flow [2022-11-23 02:54:13,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=8560, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9443, PETRI_PLACES=270, PETRI_TRANSITIONS=671} [2022-11-23 02:54:13,532 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 240 predicate places. [2022-11-23 02:54:13,532 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 671 transitions, 9443 flow [2022-11-23 02:54:13,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 113.52380952380952) internal successors, (2384), 21 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:54:13,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:13,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:13,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-23 02:54:13,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 02:54:13,739 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1653435108, now seen corresponding path program 10 times [2022-11-23 02:54:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:13,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888810355] [2022-11-23 02:54:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:14,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888810355] [2022-11-23 02:54:14,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888810355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664184676] [2022-11-23 02:54:14,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:54:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:14,515 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:14,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 02:54:14,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:54:14,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:14,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 02:54:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:15,074 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:54:15,074 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 79 treesize of output 69 [2022-11-23 02:54:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:15,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:15,459 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:54:15,460 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 75 treesize of output 49 [2022-11-23 02:54:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:15,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664184676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:15,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:15,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-11-23 02:54:15,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993063051] [2022-11-23 02:54:15,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:15,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:54:15,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:15,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:54:15,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:54:17,004 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:54:17,007 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 671 transitions, 9443 flow. Second operand has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 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 02:54:17,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:17,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:54:17,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:21,810 INFO L130 PetriNetUnfolder]: 5685/8960 cut-off events. [2022-11-23 02:54:21,810 INFO L131 PetriNetUnfolder]: For 115009/115009 co-relation queries the response was YES. [2022-11-23 02:54:21,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56741 conditions, 8960 events. 5685/8960 cut-off events. For 115009/115009 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 56463 event pairs, 393 based on Foata normal form. 4/8964 useless extension candidates. Maximal degree in co-relation 56065. Up to 5358 conditions per place. [2022-11-23 02:54:21,892 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 560 selfloop transitions, 440 changer transitions 6/1006 dead transitions. [2022-11-23 02:54:21,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 1006 transitions, 15009 flow [2022-11-23 02:54:21,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 02:54:21,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 02:54:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2355 transitions. [2022-11-23 02:54:21,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3866995073891626 [2022-11-23 02:54:21,897 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2355 transitions. [2022-11-23 02:54:21,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2355 transitions. [2022-11-23 02:54:21,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:21,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2355 transitions. [2022-11-23 02:54:21,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 112.14285714285714) internal successors, (2355), 21 states have internal predecessors, (2355), 0 states have call successors, (0), 0 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 02:54:21,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 290.0) internal successors, (6380), 22 states have internal predecessors, (6380), 0 states have call successors, (0), 0 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 02:54:21,909 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 290.0) internal successors, (6380), 22 states have internal predecessors, (6380), 0 states have call successors, (0), 0 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 02:54:21,909 INFO L175 Difference]: Start difference. First operand has 270 places, 671 transitions, 9443 flow. Second operand 21 states and 2355 transitions. [2022-11-23 02:54:21,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 1006 transitions, 15009 flow [2022-11-23 02:54:22,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1006 transitions, 14729 flow, removed 74 selfloop flow, removed 5 redundant places. [2022-11-23 02:54:22,535 INFO L231 Difference]: Finished difference. Result has 290 places, 883 transitions, 13159 flow [2022-11-23 02:54:22,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=9203, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13159, PETRI_PLACES=290, PETRI_TRANSITIONS=883} [2022-11-23 02:54:22,536 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 260 predicate places. [2022-11-23 02:54:22,536 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 883 transitions, 13159 flow [2022-11-23 02:54:22,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 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 02:54:22,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:22,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:22,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-23 02:54:22,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:54:22,738 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -16662466, now seen corresponding path program 11 times [2022-11-23 02:54:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967034915] [2022-11-23 02:54:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:22,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967034915] [2022-11-23 02:54:23,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967034915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:23,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102344308] [2022-11-23 02:54:23,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:54:23,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:23,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:23,486 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:23,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 02:54:23,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:54:23,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:23,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:54:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:24,185 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:54:24,185 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 79 treesize of output 69 [2022-11-23 02:54:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:24,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:24,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:54:24,683 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 75 treesize of output 49 [2022-11-23 02:54:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:24,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102344308] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:24,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:24,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 23 [2022-11-23 02:54:24,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258431282] [2022-11-23 02:54:24,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:24,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:54:24,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:24,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:54:24,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:54:26,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:54:26,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 883 transitions, 13159 flow. Second operand has 25 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 02:54:26,811 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:26,811 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:54:26,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:33,658 INFO L130 PetriNetUnfolder]: 5847/9216 cut-off events. [2022-11-23 02:54:33,658 INFO L131 PetriNetUnfolder]: For 124918/124918 co-relation queries the response was YES. [2022-11-23 02:54:33,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63515 conditions, 9216 events. 5847/9216 cut-off events. For 124918/124918 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 58230 event pairs, 447 based on Foata normal form. 6/9222 useless extension candidates. Maximal degree in co-relation 62781. Up to 5426 conditions per place. [2022-11-23 02:54:33,785 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 527 selfloop transitions, 562 changer transitions 11/1100 dead transitions. [2022-11-23 02:54:33,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1100 transitions, 17766 flow [2022-11-23 02:54:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 02:54:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-23 02:54:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3439 transitions. [2022-11-23 02:54:33,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3825361512791991 [2022-11-23 02:54:33,793 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3439 transitions. [2022-11-23 02:54:33,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3439 transitions. [2022-11-23 02:54:33,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:33,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3439 transitions. [2022-11-23 02:54:33,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 110.93548387096774) internal successors, (3439), 31 states have internal predecessors, (3439), 0 states have call successors, (0), 0 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 02:54:33,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 290.0) internal successors, (9280), 32 states have internal predecessors, (9280), 0 states have call successors, (0), 0 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 02:54:33,812 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 290.0) internal successors, (9280), 32 states have internal predecessors, (9280), 0 states have call successors, (0), 0 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 02:54:33,812 INFO L175 Difference]: Start difference. First operand has 290 places, 883 transitions, 13159 flow. Second operand 31 states and 3439 transitions. [2022-11-23 02:54:33,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1100 transitions, 17766 flow [2022-11-23 02:54:34,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1100 transitions, 17217 flow, removed 164 selfloop flow, removed 6 redundant places. [2022-11-23 02:54:34,747 INFO L231 Difference]: Finished difference. Result has 323 places, 964 transitions, 15224 flow [2022-11-23 02:54:34,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=12618, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=501, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=15224, PETRI_PLACES=323, PETRI_TRANSITIONS=964} [2022-11-23 02:54:34,748 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 293 predicate places. [2022-11-23 02:54:34,749 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 964 transitions, 15224 flow [2022-11-23 02:54:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 106.48) internal successors, (2662), 25 states have internal predecessors, (2662), 0 states have call successors, (0), 0 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 02:54:34,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:34,750 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, 1, 1] [2022-11-23 02:54:34,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:54:34,960 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1608374887, now seen corresponding path program 12 times [2022-11-23 02:54:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:34,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131851615] [2022-11-23 02:54:34,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:34,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:35,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131851615] [2022-11-23 02:54:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131851615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:35,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127810521] [2022-11-23 02:54:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:54:35,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:35,128 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:35,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 02:54:35,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-23 02:54:35,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:54:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:35,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127810521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:35,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-23 02:54:35,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891082301] [2022-11-23 02:54:35,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:35,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:54:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:54:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:54:35,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-11-23 02:54:35,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 964 transitions, 15224 flow. Second operand has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 02:54:35,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:35,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-11-23 02:54:35,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:39,817 INFO L130 PetriNetUnfolder]: 5656/9084 cut-off events. [2022-11-23 02:54:39,817 INFO L131 PetriNetUnfolder]: For 187879/190016 co-relation queries the response was YES. [2022-11-23 02:54:39,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69464 conditions, 9084 events. 5656/9084 cut-off events. For 187879/190016 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59907 event pairs, 1021 based on Foata normal form. 994/9722 useless extension candidates. Maximal degree in co-relation 69258. Up to 3856 conditions per place. [2022-11-23 02:54:39,926 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 893 selfloop transitions, 93 changer transitions 22/1066 dead transitions. [2022-11-23 02:54:39,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1066 transitions, 18290 flow [2022-11-23 02:54:39,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:54:39,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:54:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2022-11-23 02:54:39,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45517241379310347 [2022-11-23 02:54:39,929 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2022-11-23 02:54:39,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2022-11-23 02:54:39,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:39,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2022-11-23 02:54:39,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 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 02:54:39,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 02:54:39,935 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 02:54:39,936 INFO L175 Difference]: Start difference. First operand has 323 places, 964 transitions, 15224 flow. Second operand 8 states and 1056 transitions. [2022-11-23 02:54:39,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1066 transitions, 18290 flow [2022-11-23 02:54:40,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1066 transitions, 17637 flow, removed 197 selfloop flow, removed 16 redundant places. [2022-11-23 02:54:40,939 INFO L231 Difference]: Finished difference. Result has 317 places, 878 transitions, 13576 flow [2022-11-23 02:54:40,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13139, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13576, PETRI_PLACES=317, PETRI_TRANSITIONS=878} [2022-11-23 02:54:40,940 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 287 predicate places. [2022-11-23 02:54:40,940 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 878 transitions, 13576 flow [2022-11-23 02:54:40,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.78571428571429) internal successors, (1761), 14 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 02:54:40,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:40,941 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:41,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 02:54:41,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1760099635, now seen corresponding path program 1 times [2022-11-23 02:54:41,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:41,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617975102] [2022-11-23 02:54:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:41,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617975102] [2022-11-23 02:54:41,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617975102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:41,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572009644] [2022-11-23 02:54:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:41,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:41,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:41,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:41,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 02:54:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:41,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:54:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:41,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572009644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:41,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:41,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 02:54:41,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526672127] [2022-11-23 02:54:41,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:41,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:54:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:41,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:54:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:54:42,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:54:42,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 878 transitions, 13576 flow. Second operand has 16 states, 16 states have (on average 119.625) internal successors, (1914), 16 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 02:54:42,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:42,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:54:42,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:46,237 INFO L130 PetriNetUnfolder]: 6191/10021 cut-off events. [2022-11-23 02:54:46,237 INFO L131 PetriNetUnfolder]: For 179726/179837 co-relation queries the response was YES. [2022-11-23 02:54:46,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75943 conditions, 10021 events. 6191/10021 cut-off events. For 179726/179837 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 66864 event pairs, 1194 based on Foata normal form. 147/10134 useless extension candidates. Maximal degree in co-relation 75335. Up to 3690 conditions per place. [2022-11-23 02:54:46,390 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 837 selfloop transitions, 181 changer transitions 74/1127 dead transitions. [2022-11-23 02:54:46,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1127 transitions, 18950 flow [2022-11-23 02:54:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:54:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:54:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1520 transitions. [2022-11-23 02:54:46,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2022-11-23 02:54:46,393 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1520 transitions. [2022-11-23 02:54:46,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1520 transitions. [2022-11-23 02:54:46,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:46,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1520 transitions. [2022-11-23 02:54:46,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 02:54:46,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 02:54:46,397 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 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 02:54:46,397 INFO L175 Difference]: Start difference. First operand has 317 places, 878 transitions, 13576 flow. Second operand 12 states and 1520 transitions. [2022-11-23 02:54:46,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1127 transitions, 18950 flow [2022-11-23 02:54:47,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1127 transitions, 18889 flow, removed 27 selfloop flow, removed 3 redundant places. [2022-11-23 02:54:47,603 INFO L231 Difference]: Finished difference. Result has 331 places, 887 transitions, 14487 flow [2022-11-23 02:54:47,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13521, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=714, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14487, PETRI_PLACES=331, PETRI_TRANSITIONS=887} [2022-11-23 02:54:47,605 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 301 predicate places. [2022-11-23 02:54:47,605 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 887 transitions, 14487 flow [2022-11-23 02:54:47,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.625) internal successors, (1914), 16 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 02:54:47,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:47,606 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, 1, 1] [2022-11-23 02:54:47,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:47,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:54:47,806 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1512396036, now seen corresponding path program 13 times [2022-11-23 02:54:47,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:47,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117757341] [2022-11-23 02:54:47,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:47,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:47,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:47,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117757341] [2022-11-23 02:54:47,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117757341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:47,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472736647] [2022-11-23 02:54:47,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:54:47,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:47,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:47,934 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:47,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 02:54:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:54:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:48,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:48,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472736647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:48,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:48,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-23 02:54:48,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115872092] [2022-11-23 02:54:48,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:48,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:54:48,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:54:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:54:48,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-11-23 02:54:48,431 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 887 transitions, 14487 flow. Second operand has 14 states, 14 states have (on average 125.85714285714286) internal successors, (1762), 14 states have internal predecessors, (1762), 0 states have call successors, (0), 0 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 02:54:48,431 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:48,431 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-11-23 02:54:48,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:51,665 INFO L130 PetriNetUnfolder]: 4581/7373 cut-off events. [2022-11-23 02:54:51,665 INFO L131 PetriNetUnfolder]: For 179586/180376 co-relation queries the response was YES. [2022-11-23 02:54:51,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61912 conditions, 7373 events. 4581/7373 cut-off events. For 179586/180376 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 47111 event pairs, 1401 based on Foata normal form. 373/7493 useless extension candidates. Maximal degree in co-relation 61444. Up to 4243 conditions per place. [2022-11-23 02:54:51,737 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 748 selfloop transitions, 124 changer transitions 1/933 dead transitions. [2022-11-23 02:54:51,737 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 933 transitions, 16925 flow [2022-11-23 02:54:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:54:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:54:51,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2022-11-23 02:54:51,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45615763546798027 [2022-11-23 02:54:51,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2022-11-23 02:54:51,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2022-11-23 02:54:51,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:51,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2022-11-23 02:54:51,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 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 02:54:51,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 02:54:51,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 02:54:51,743 INFO L175 Difference]: Start difference. First operand has 331 places, 887 transitions, 14487 flow. Second operand 7 states and 926 transitions. [2022-11-23 02:54:51,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 933 transitions, 16925 flow [2022-11-23 02:54:52,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 933 transitions, 16563 flow, removed 139 selfloop flow, removed 7 redundant places. [2022-11-23 02:54:52,617 INFO L231 Difference]: Finished difference. Result has 327 places, 836 transitions, 13833 flow [2022-11-23 02:54:52,618 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13372, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13833, PETRI_PLACES=327, PETRI_TRANSITIONS=836} [2022-11-23 02:54:52,619 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2022-11-23 02:54:52,619 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 836 transitions, 13833 flow [2022-11-23 02:54:52,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 125.85714285714286) internal successors, (1762), 14 states have internal predecessors, (1762), 0 states have call successors, (0), 0 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 02:54:52,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:52,620 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, 1, 1] [2022-11-23 02:54:52,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:54:52,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:54:52,825 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1623268655, now seen corresponding path program 14 times [2022-11-23 02:54:52,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:52,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710080180] [2022-11-23 02:54:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:52,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:53,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710080180] [2022-11-23 02:54:53,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710080180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77374707] [2022-11-23 02:54:53,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:54:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:53,043 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:53,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 02:54:53,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:54:53,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:54:53,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:53,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:54:53,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77374707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:53,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:53,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-23 02:54:53,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814750162] [2022-11-23 02:54:53,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:53,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:54:53,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:54:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:54:53,952 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 290 [2022-11-23 02:54:53,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 836 transitions, 13833 flow. Second operand has 15 states, 15 states have (on average 124.13333333333334) internal successors, (1862), 15 states have internal predecessors, (1862), 0 states have call successors, (0), 0 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 02:54:53,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:53,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 290 [2022-11-23 02:54:53,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:54:56,786 INFO L130 PetriNetUnfolder]: 3953/6614 cut-off events. [2022-11-23 02:54:56,787 INFO L131 PetriNetUnfolder]: For 120824/121338 co-relation queries the response was YES. [2022-11-23 02:54:56,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52514 conditions, 6614 events. 3953/6614 cut-off events. For 120824/121338 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 44020 event pairs, 873 based on Foata normal form. 505/7067 useless extension candidates. Maximal degree in co-relation 52089. Up to 2437 conditions per place. [2022-11-23 02:54:56,873 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 633 selfloop transitions, 75 changer transitions 97/865 dead transitions. [2022-11-23 02:54:56,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 865 transitions, 15594 flow [2022-11-23 02:54:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:54:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:54:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1039 transitions. [2022-11-23 02:54:56,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4478448275862069 [2022-11-23 02:54:56,876 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1039 transitions. [2022-11-23 02:54:56,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1039 transitions. [2022-11-23 02:54:56,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:54:56,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1039 transitions. [2022-11-23 02:54:56,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 02:54:56,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 02:54:56,881 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 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 02:54:56,881 INFO L175 Difference]: Start difference. First operand has 327 places, 836 transitions, 13833 flow. Second operand 8 states and 1039 transitions. [2022-11-23 02:54:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 865 transitions, 15594 flow [2022-11-23 02:54:57,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 865 transitions, 15165 flow, removed 81 selfloop flow, removed 7 redundant places. [2022-11-23 02:54:57,748 INFO L231 Difference]: Finished difference. Result has 329 places, 704 transitions, 11381 flow [2022-11-23 02:54:57,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=12596, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11381, PETRI_PLACES=329, PETRI_TRANSITIONS=704} [2022-11-23 02:54:57,750 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 299 predicate places. [2022-11-23 02:54:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 704 transitions, 11381 flow [2022-11-23 02:54:57,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.13333333333334) internal successors, (1862), 15 states have internal predecessors, (1862), 0 states have call successors, (0), 0 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 02:54:57,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:54:57,752 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:54:57,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-23 02:54:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:57,958 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:54:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:54:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -918411547, now seen corresponding path program 2 times [2022-11-23 02:54:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:54:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722864920] [2022-11-23 02:54:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:54:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:54:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:54:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:58,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:54:58,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722864920] [2022-11-23 02:54:58,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722864920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:54:58,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796656500] [2022-11-23 02:54:58,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:54:58,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:54:58,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:54:58,153 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:54:58,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 02:54:58,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:54:58,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:54:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:54:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:54:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:58,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:54:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:54:58,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796656500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:54:58,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:54:58,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-23 02:54:58,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317231392] [2022-11-23 02:54:58,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:54:58,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:54:58,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:54:58,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:54:58,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:54:58,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:54:58,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 704 transitions, 11381 flow. Second operand has 17 states, 17 states have (on average 119.11764705882354) internal successors, (2025), 17 states have internal predecessors, (2025), 0 states have call successors, (0), 0 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 02:54:58,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:54:58,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:54:58,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:02,321 INFO L130 PetriNetUnfolder]: 4470/7675 cut-off events. [2022-11-23 02:55:02,321 INFO L131 PetriNetUnfolder]: For 141407/141470 co-relation queries the response was YES. [2022-11-23 02:55:02,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59233 conditions, 7675 events. 4470/7675 cut-off events. For 141407/141470 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 53881 event pairs, 443 based on Foata normal form. 114/7774 useless extension candidates. Maximal degree in co-relation 58823. Up to 1921 conditions per place. [2022-11-23 02:55:02,413 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 663 selfloop transitions, 230 changer transitions 92/1015 dead transitions. [2022-11-23 02:55:02,413 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1015 transitions, 17245 flow [2022-11-23 02:55:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:55:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:55:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2280 transitions. [2022-11-23 02:55:02,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2022-11-23 02:55:02,418 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2280 transitions. [2022-11-23 02:55:02,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2280 transitions. [2022-11-23 02:55:02,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:02,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2280 transitions. [2022-11-23 02:55:02,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 126.66666666666667) internal successors, (2280), 18 states have internal predecessors, (2280), 0 states have call successors, (0), 0 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 02:55:02,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 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 02:55:02,427 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 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 02:55:02,427 INFO L175 Difference]: Start difference. First operand has 329 places, 704 transitions, 11381 flow. Second operand 18 states and 2280 transitions. [2022-11-23 02:55:02,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1015 transitions, 17245 flow [2022-11-23 02:55:03,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1015 transitions, 17031 flow, removed 92 selfloop flow, removed 5 redundant places. [2022-11-23 02:55:03,313 INFO L231 Difference]: Finished difference. Result has 338 places, 734 transitions, 12488 flow [2022-11-23 02:55:03,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11081, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12488, PETRI_PLACES=338, PETRI_TRANSITIONS=734} [2022-11-23 02:55:03,314 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2022-11-23 02:55:03,314 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 734 transitions, 12488 flow [2022-11-23 02:55:03,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 119.11764705882354) internal successors, (2025), 17 states have internal predecessors, (2025), 0 states have call successors, (0), 0 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 02:55:03,314 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:03,315 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:55:03,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:03,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:03,515 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:03,516 INFO L85 PathProgramCache]: Analyzing trace with hash 792201761, now seen corresponding path program 3 times [2022-11-23 02:55:03,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:03,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022180555] [2022-11-23 02:55:03,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:03,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:03,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022180555] [2022-11-23 02:55:03,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022180555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:03,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221467884] [2022-11-23 02:55:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:55:03,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:03,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:03,671 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:03,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 02:55:03,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:55:03,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:03,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:55:03,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:03,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:04,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221467884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:04,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:04,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 02:55:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630462728] [2022-11-23 02:55:04,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:04,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:55:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:55:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:55:04,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:04,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 734 transitions, 12488 flow. Second operand has 18 states, 18 states have (on average 119.05555555555556) internal successors, (2143), 18 states have internal predecessors, (2143), 0 states have call successors, (0), 0 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 02:55:04,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:04,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:04,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:07,447 INFO L130 PetriNetUnfolder]: 3737/6243 cut-off events. [2022-11-23 02:55:07,448 INFO L131 PetriNetUnfolder]: For 138632/138721 co-relation queries the response was YES. [2022-11-23 02:55:07,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53441 conditions, 6243 events. 3737/6243 cut-off events. For 138632/138721 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40611 event pairs, 519 based on Foata normal form. 186/6418 useless extension candidates. Maximal degree in co-relation 53035. Up to 2090 conditions per place. [2022-11-23 02:55:07,760 INFO L137 encePairwiseOnDemand]: 281/290 looper letters, 634 selfloop transitions, 161 changer transitions 81/902 dead transitions. [2022-11-23 02:55:07,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 902 transitions, 16251 flow [2022-11-23 02:55:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:55:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:55:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1882 transitions. [2022-11-23 02:55:07,764 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43264367816091953 [2022-11-23 02:55:07,764 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1882 transitions. [2022-11-23 02:55:07,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1882 transitions. [2022-11-23 02:55:07,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:07,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1882 transitions. [2022-11-23 02:55:07,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 125.46666666666667) internal successors, (1882), 15 states have internal predecessors, (1882), 0 states have call successors, (0), 0 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 02:55:07,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 02:55:07,778 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 02:55:07,778 INFO L175 Difference]: Start difference. First operand has 338 places, 734 transitions, 12488 flow. Second operand 15 states and 1882 transitions. [2022-11-23 02:55:07,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 902 transitions, 16251 flow [2022-11-23 02:55:08,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 902 transitions, 15500 flow, removed 239 selfloop flow, removed 13 redundant places. [2022-11-23 02:55:08,749 INFO L231 Difference]: Finished difference. Result has 339 places, 653 transitions, 10616 flow [2022-11-23 02:55:08,750 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=10761, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10616, PETRI_PLACES=339, PETRI_TRANSITIONS=653} [2022-11-23 02:55:08,750 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2022-11-23 02:55:08,750 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 653 transitions, 10616 flow [2022-11-23 02:55:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 119.05555555555556) internal successors, (2143), 18 states have internal predecessors, (2143), 0 states have call successors, (0), 0 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 02:55:08,751 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:08,751 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:55:08,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:08,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:08,957 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -444215525, now seen corresponding path program 4 times [2022-11-23 02:55:08,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:08,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387617171] [2022-11-23 02:55:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:09,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:09,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387617171] [2022-11-23 02:55:09,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387617171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:09,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163676907] [2022-11-23 02:55:09,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:55:09,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:09,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:09,115 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:09,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 02:55:09,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:55:09,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:55:09,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:09,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163676907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:09,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:09,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-11-23 02:55:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800315186] [2022-11-23 02:55:09,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:09,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:55:09,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:55:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:55:09,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 290 [2022-11-23 02:55:09,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 653 transitions, 10616 flow. Second operand has 16 states, 16 states have (on average 116.8125) internal successors, (1869), 16 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 02:55:09,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:09,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 290 [2022-11-23 02:55:09,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:12,705 INFO L130 PetriNetUnfolder]: 3003/4945 cut-off events. [2022-11-23 02:55:12,706 INFO L131 PetriNetUnfolder]: For 92172/92172 co-relation queries the response was YES. [2022-11-23 02:55:12,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41589 conditions, 4945 events. 3003/4945 cut-off events. For 92172/92172 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 29876 event pairs, 259 based on Foata normal form. 300/5245 useless extension candidates. Maximal degree in co-relation 41304. Up to 1713 conditions per place. [2022-11-23 02:55:12,758 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 404 selfloop transitions, 334 changer transitions 158/896 dead transitions. [2022-11-23 02:55:12,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 896 transitions, 15531 flow [2022-11-23 02:55:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 02:55:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-23 02:55:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4090 transitions. [2022-11-23 02:55:12,765 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4148073022312373 [2022-11-23 02:55:12,765 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4090 transitions. [2022-11-23 02:55:12,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4090 transitions. [2022-11-23 02:55:12,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:12,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4090 transitions. [2022-11-23 02:55:12,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 120.29411764705883) internal successors, (4090), 34 states have internal predecessors, (4090), 0 states have call successors, (0), 0 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 02:55:12,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 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 02:55:12,786 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 290.0) internal successors, (10150), 35 states have internal predecessors, (10150), 0 states have call successors, (0), 0 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 02:55:12,786 INFO L175 Difference]: Start difference. First operand has 339 places, 653 transitions, 10616 flow. Second operand 34 states and 4090 transitions. [2022-11-23 02:55:12,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 896 transitions, 15531 flow [2022-11-23 02:55:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 896 transitions, 14672 flow, removed 190 selfloop flow, removed 32 redundant places. [2022-11-23 02:55:13,543 INFO L231 Difference]: Finished difference. Result has 324 places, 594 transitions, 9761 flow [2022-11-23 02:55:13,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7894, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9761, PETRI_PLACES=324, PETRI_TRANSITIONS=594} [2022-11-23 02:55:13,544 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 294 predicate places. [2022-11-23 02:55:13,544 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 594 transitions, 9761 flow [2022-11-23 02:55:13,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 116.8125) internal successors, (1869), 16 states have internal predecessors, (1869), 0 states have call successors, (0), 0 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 02:55:13,544 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:13,545 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, 1, 1] [2022-11-23 02:55:13,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 02:55:13,745 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash 2059271841, now seen corresponding path program 15 times [2022-11-23 02:55:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:13,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113305520] [2022-11-23 02:55:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:13,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:13,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113305520] [2022-11-23 02:55:13,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113305520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795101716] [2022-11-23 02:55:13,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:55:13,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:13,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:13,955 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:13,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 02:55:14,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:55:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:55:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:14,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:14,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:55:14,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795101716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:14,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:14,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-23 02:55:14,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622616077] [2022-11-23 02:55:14,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:14,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:55:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:55:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:55:15,001 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:15,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 594 transitions, 9761 flow. Second operand has 21 states, 21 states have (on average 119.57142857142857) internal successors, (2511), 21 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 02:55:15,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:15,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:17,702 INFO L130 PetriNetUnfolder]: 3247/5096 cut-off events. [2022-11-23 02:55:17,715 INFO L131 PetriNetUnfolder]: For 105577/105599 co-relation queries the response was YES. [2022-11-23 02:55:17,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47138 conditions, 5096 events. 3247/5096 cut-off events. For 105577/105599 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 28425 event pairs, 353 based on Foata normal form. 36/5128 useless extension candidates. Maximal degree in co-relation 47038. Up to 2170 conditions per place. [2022-11-23 02:55:17,782 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 553 selfloop transitions, 257 changer transitions 0/831 dead transitions. [2022-11-23 02:55:17,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 831 transitions, 15086 flow [2022-11-23 02:55:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:55:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 02:55:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1753 transitions. [2022-11-23 02:55:17,785 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43177339901477835 [2022-11-23 02:55:17,785 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1753 transitions. [2022-11-23 02:55:17,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1753 transitions. [2022-11-23 02:55:17,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:17,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1753 transitions. [2022-11-23 02:55:17,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 125.21428571428571) internal successors, (1753), 14 states have internal predecessors, (1753), 0 states have call successors, (0), 0 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 02:55:17,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 02:55:17,798 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 290.0) internal successors, (4350), 15 states have internal predecessors, (4350), 0 states have call successors, (0), 0 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 02:55:17,798 INFO L175 Difference]: Start difference. First operand has 324 places, 594 transitions, 9761 flow. Second operand 14 states and 1753 transitions. [2022-11-23 02:55:17,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 831 transitions, 15086 flow [2022-11-23 02:55:18,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 831 transitions, 13438 flow, removed 376 selfloop flow, removed 29 redundant places. [2022-11-23 02:55:18,565 INFO L231 Difference]: Finished difference. Result has 242 places, 661 transitions, 10851 flow [2022-11-23 02:55:18,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=8682, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10851, PETRI_PLACES=242, PETRI_TRANSITIONS=661} [2022-11-23 02:55:18,567 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2022-11-23 02:55:18,567 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 661 transitions, 10851 flow [2022-11-23 02:55:18,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.57142857142857) internal successors, (2511), 21 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 02:55:18,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:18,568 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, 1, 1] [2022-11-23 02:55:18,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 02:55:18,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:18,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1470186521, now seen corresponding path program 16 times [2022-11-23 02:55:18,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654040338] [2022-11-23 02:55:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:18,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654040338] [2022-11-23 02:55:18,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654040338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693906159] [2022-11-23 02:55:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:55:18,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:18,974 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:18,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 02:55:19,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:55:19,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:55:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:19,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:19,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693906159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:19,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:19,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-23 02:55:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130594875] [2022-11-23 02:55:19,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:19,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:55:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:19,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:55:19,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:55:19,847 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 290 [2022-11-23 02:55:19,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 661 transitions, 10851 flow. Second operand has 17 states, 17 states have (on average 115.47058823529412) internal successors, (1963), 17 states have internal predecessors, (1963), 0 states have call successors, (0), 0 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 02:55:19,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:19,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 290 [2022-11-23 02:55:19,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:22,525 INFO L130 PetriNetUnfolder]: 3257/5090 cut-off events. [2022-11-23 02:55:22,525 INFO L131 PetriNetUnfolder]: For 85376/85376 co-relation queries the response was YES. [2022-11-23 02:55:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44790 conditions, 5090 events. 3257/5090 cut-off events. For 85376/85376 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 27873 event pairs, 218 based on Foata normal form. 34/5124 useless extension candidates. Maximal degree in co-relation 44704. Up to 2179 conditions per place. [2022-11-23 02:55:22,577 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 527 selfloop transitions, 315 changer transitions 0/842 dead transitions. [2022-11-23 02:55:22,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 842 transitions, 15285 flow [2022-11-23 02:55:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 02:55:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 02:55:22,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2285 transitions. [2022-11-23 02:55:22,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4147005444646098 [2022-11-23 02:55:22,582 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2285 transitions. [2022-11-23 02:55:22,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2285 transitions. [2022-11-23 02:55:22,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:22,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2285 transitions. [2022-11-23 02:55:22,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 120.26315789473684) internal successors, (2285), 19 states have internal predecessors, (2285), 0 states have call successors, (0), 0 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 02:55:22,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 02:55:22,594 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 02:55:22,594 INFO L175 Difference]: Start difference. First operand has 242 places, 661 transitions, 10851 flow. Second operand 19 states and 2285 transitions. [2022-11-23 02:55:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 842 transitions, 15285 flow [2022-11-23 02:55:23,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 842 transitions, 14843 flow, removed 197 selfloop flow, removed 8 redundant places. [2022-11-23 02:55:23,161 INFO L231 Difference]: Finished difference. Result has 251 places, 698 transitions, 12192 flow [2022-11-23 02:55:23,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=10263, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12192, PETRI_PLACES=251, PETRI_TRANSITIONS=698} [2022-11-23 02:55:23,162 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2022-11-23 02:55:23,162 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 698 transitions, 12192 flow [2022-11-23 02:55:23,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 115.47058823529412) internal successors, (1963), 17 states have internal predecessors, (1963), 0 states have call successors, (0), 0 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 02:55:23,162 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:23,163 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, 1, 1] [2022-11-23 02:55:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:23,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:23,363 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash -213198217, now seen corresponding path program 17 times [2022-11-23 02:55:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822007810] [2022-11-23 02:55:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:23,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:23,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822007810] [2022-11-23 02:55:23,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822007810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:23,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569471216] [2022-11-23 02:55:23,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:55:23,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:23,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:23,573 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:23,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 02:55:23,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:55:23,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:55:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:23,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:23,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569471216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:23,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:23,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-23 02:55:23,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821239045] [2022-11-23 02:55:23,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:55:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:55:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:55:24,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 290 [2022-11-23 02:55:24,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 698 transitions, 12192 flow. Second operand has 18 states, 18 states have (on average 115.44444444444444) internal successors, (2078), 18 states have internal predecessors, (2078), 0 states have call successors, (0), 0 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 02:55:24,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:24,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 290 [2022-11-23 02:55:24,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:27,089 INFO L130 PetriNetUnfolder]: 3148/4844 cut-off events. [2022-11-23 02:55:27,089 INFO L131 PetriNetUnfolder]: For 84693/84693 co-relation queries the response was YES. [2022-11-23 02:55:27,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43973 conditions, 4844 events. 3148/4844 cut-off events. For 84693/84693 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 25738 event pairs, 190 based on Foata normal form. 76/4920 useless extension candidates. Maximal degree in co-relation 43885. Up to 2159 conditions per place. [2022-11-23 02:55:27,157 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 494 selfloop transitions, 321 changer transitions 0/815 dead transitions. [2022-11-23 02:55:27,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 815 transitions, 15263 flow [2022-11-23 02:55:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 02:55:27,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-23 02:55:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2281 transitions. [2022-11-23 02:55:27,162 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41397459165154266 [2022-11-23 02:55:27,162 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2281 transitions. [2022-11-23 02:55:27,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2281 transitions. [2022-11-23 02:55:27,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:27,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2281 transitions. [2022-11-23 02:55:27,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 120.05263157894737) internal successors, (2281), 19 states have internal predecessors, (2281), 0 states have call successors, (0), 0 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 02:55:27,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 02:55:27,176 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 290.0) internal successors, (5800), 20 states have internal predecessors, (5800), 0 states have call successors, (0), 0 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 02:55:27,176 INFO L175 Difference]: Start difference. First operand has 251 places, 698 transitions, 12192 flow. Second operand 19 states and 2281 transitions. [2022-11-23 02:55:27,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 815 transitions, 15263 flow [2022-11-23 02:55:27,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 815 transitions, 14805 flow, removed 177 selfloop flow, removed 12 redundant places. [2022-11-23 02:55:27,875 INFO L231 Difference]: Finished difference. Result has 254 places, 685 transitions, 12260 flow [2022-11-23 02:55:27,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11507, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12260, PETRI_PLACES=254, PETRI_TRANSITIONS=685} [2022-11-23 02:55:27,877 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2022-11-23 02:55:27,877 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 685 transitions, 12260 flow [2022-11-23 02:55:27,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.44444444444444) internal successors, (2078), 18 states have internal predecessors, (2078), 0 states have call successors, (0), 0 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 02:55:27,878 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:27,878 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, 1, 1] [2022-11-23 02:55:27,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:28,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 02:55:28,084 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:28,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:28,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1529877889, now seen corresponding path program 18 times [2022-11-23 02:55:28,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:28,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25720611] [2022-11-23 02:55:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:28,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:28,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25720611] [2022-11-23 02:55:28,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25720611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:28,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119807102] [2022-11-23 02:55:28,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:55:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:28,319 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:28,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 02:55:28,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 02:55:28,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:28,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:55:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:28,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:28,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119807102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:28,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:28,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-23 02:55:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945227930] [2022-11-23 02:55:28,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:28,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 02:55:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:28,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 02:55:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-11-23 02:55:29,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:29,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 685 transitions, 12260 flow. Second operand has 22 states, 22 states have (on average 118.81818181818181) internal successors, (2614), 22 states have internal predecessors, (2614), 0 states have call successors, (0), 0 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 02:55:29,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:29,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:29,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:31,301 INFO L130 PetriNetUnfolder]: 3054/4696 cut-off events. [2022-11-23 02:55:31,301 INFO L131 PetriNetUnfolder]: For 79747/79753 co-relation queries the response was YES. [2022-11-23 02:55:31,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42979 conditions, 4696 events. 3054/4696 cut-off events. For 79747/79753 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24926 event pairs, 359 based on Foata normal form. 38/4727 useless extension candidates. Maximal degree in co-relation 42899. Up to 2132 conditions per place. [2022-11-23 02:55:31,373 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 498 selfloop transitions, 244 changer transitions 0/765 dead transitions. [2022-11-23 02:55:31,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 765 transitions, 14558 flow [2022-11-23 02:55:31,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:55:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 02:55:31,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1249 transitions. [2022-11-23 02:55:31,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4306896551724138 [2022-11-23 02:55:31,376 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1249 transitions. [2022-11-23 02:55:31,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1249 transitions. [2022-11-23 02:55:31,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:31,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1249 transitions. [2022-11-23 02:55:31,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.9) internal successors, (1249), 10 states have internal predecessors, (1249), 0 states have call successors, (0), 0 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 02:55:31,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 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 02:55:31,380 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 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 02:55:31,380 INFO L175 Difference]: Start difference. First operand has 254 places, 685 transitions, 12260 flow. Second operand 10 states and 1249 transitions. [2022-11-23 02:55:31,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 765 transitions, 14558 flow [2022-11-23 02:55:31,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 765 transitions, 14157 flow, removed 20 selfloop flow, removed 10 redundant places. [2022-11-23 02:55:32,104 INFO L231 Difference]: Finished difference. Result has 252 places, 676 transitions, 12191 flow [2022-11-23 02:55:32,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11703, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12191, PETRI_PLACES=252, PETRI_TRANSITIONS=676} [2022-11-23 02:55:32,105 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 222 predicate places. [2022-11-23 02:55:32,105 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 676 transitions, 12191 flow [2022-11-23 02:55:32,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 118.81818181818181) internal successors, (2614), 22 states have internal predecessors, (2614), 0 states have call successors, (0), 0 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 02:55:32,105 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:32,105 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, 1, 1] [2022-11-23 02:55:32,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:32,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:32,306 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -409317565, now seen corresponding path program 19 times [2022-11-23 02:55:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:32,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115509630] [2022-11-23 02:55:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:32,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:32,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:32,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115509630] [2022-11-23 02:55:32,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115509630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:32,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381387460] [2022-11-23 02:55:32,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:55:32,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:32,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:32,499 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:32,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 02:55:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:55:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:32,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:32,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381387460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:32,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:32,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-23 02:55:32,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480228891] [2022-11-23 02:55:32,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:32,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:55:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:55:32,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:55:33,382 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:33,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 676 transitions, 12191 flow. Second operand has 21 states, 21 states have (on average 119.04761904761905) internal successors, (2500), 21 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 02:55:33,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:33,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:33,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:35,916 INFO L130 PetriNetUnfolder]: 3642/5649 cut-off events. [2022-11-23 02:55:35,916 INFO L131 PetriNetUnfolder]: For 103985/103999 co-relation queries the response was YES. [2022-11-23 02:55:35,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51895 conditions, 5649 events. 3642/5649 cut-off events. For 103985/103999 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 31464 event pairs, 537 based on Foata normal form. 29/5669 useless extension candidates. Maximal degree in co-relation 51816. Up to 3248 conditions per place. [2022-11-23 02:55:35,985 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 601 selfloop transitions, 305 changer transitions 0/929 dead transitions. [2022-11-23 02:55:35,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 929 transitions, 17632 flow [2022-11-23 02:55:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 02:55:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-23 02:55:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1876 transitions. [2022-11-23 02:55:35,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43126436781609195 [2022-11-23 02:55:35,989 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1876 transitions. [2022-11-23 02:55:35,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1876 transitions. [2022-11-23 02:55:35,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:35,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1876 transitions. [2022-11-23 02:55:35,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 125.06666666666666) internal successors, (1876), 15 states have internal predecessors, (1876), 0 states have call successors, (0), 0 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 02:55:35,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 02:55:35,999 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 290.0) internal successors, (4640), 16 states have internal predecessors, (4640), 0 states have call successors, (0), 0 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 02:55:35,999 INFO L175 Difference]: Start difference. First operand has 252 places, 676 transitions, 12191 flow. Second operand 15 states and 1876 transitions. [2022-11-23 02:55:35,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 929 transitions, 17632 flow [2022-11-23 02:55:36,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 929 transitions, 17122 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-23 02:55:36,966 INFO L231 Difference]: Finished difference. Result has 261 places, 732 transitions, 13597 flow [2022-11-23 02:55:36,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11703, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=13597, PETRI_PLACES=261, PETRI_TRANSITIONS=732} [2022-11-23 02:55:36,967 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 231 predicate places. [2022-11-23 02:55:36,967 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 732 transitions, 13597 flow [2022-11-23 02:55:36,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.04761904761905) internal successors, (2500), 21 states have internal predecessors, (2500), 0 states have call successors, (0), 0 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 02:55:36,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:36,967 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, 1, 1] [2022-11-23 02:55:36,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:37,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 02:55:37,168 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:37,168 INFO L85 PathProgramCache]: Analyzing trace with hash -113587851, now seen corresponding path program 20 times [2022-11-23 02:55:37,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:37,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502545008] [2022-11-23 02:55:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:37,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502545008] [2022-11-23 02:55:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502545008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:37,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714510035] [2022-11-23 02:55:37,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:55:37,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:37,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:37,371 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:37,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 02:55:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:55:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:37,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:55:37,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:37,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:55:37,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714510035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:37,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:37,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-23 02:55:37,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698903769] [2022-11-23 02:55:37,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:37,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 02:55:37,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:37,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 02:55:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-23 02:55:38,325 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:38,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 732 transitions, 13597 flow. Second operand has 21 states, 21 states have (on average 118.95238095238095) internal successors, (2498), 21 states have internal predecessors, (2498), 0 states have call successors, (0), 0 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 02:55:38,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:38,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:38,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:41,683 INFO L130 PetriNetUnfolder]: 4748/7332 cut-off events. [2022-11-23 02:55:41,684 INFO L131 PetriNetUnfolder]: For 148858/148879 co-relation queries the response was YES. [2022-11-23 02:55:41,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70000 conditions, 7332 events. 4748/7332 cut-off events. For 148858/148879 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42421 event pairs, 461 based on Foata normal form. 33/7362 useless extension candidates. Maximal degree in co-relation 69917. Up to 3372 conditions per place. [2022-11-23 02:55:41,777 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 642 selfloop transitions, 403 changer transitions 0/1068 dead transitions. [2022-11-23 02:55:41,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 1068 transitions, 20738 flow [2022-11-23 02:55:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:55:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:55:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2262 transitions. [2022-11-23 02:55:41,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-11-23 02:55:41,782 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2262 transitions. [2022-11-23 02:55:41,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2262 transitions. [2022-11-23 02:55:41,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:41,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2262 transitions. [2022-11-23 02:55:41,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 125.66666666666667) internal successors, (2262), 18 states have internal predecessors, (2262), 0 states have call successors, (0), 0 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 02:55:41,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 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 02:55:41,792 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 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 02:55:41,793 INFO L175 Difference]: Start difference. First operand has 261 places, 732 transitions, 13597 flow. Second operand 18 states and 2262 transitions. [2022-11-23 02:55:41,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 1068 transitions, 20738 flow [2022-11-23 02:55:42,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 1068 transitions, 19898 flow, removed 163 selfloop flow, removed 7 redundant places. [2022-11-23 02:55:42,784 INFO L231 Difference]: Finished difference. Result has 276 places, 782 transitions, 15125 flow [2022-11-23 02:55:42,785 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=12750, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15125, PETRI_PLACES=276, PETRI_TRANSITIONS=782} [2022-11-23 02:55:42,785 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 246 predicate places. [2022-11-23 02:55:42,785 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 782 transitions, 15125 flow [2022-11-23 02:55:42,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 118.95238095238095) internal successors, (2498), 21 states have internal predecessors, (2498), 0 states have call successors, (0), 0 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 02:55:42,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:42,786 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, 1, 1] [2022-11-23 02:55:42,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:42,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 02:55:42,992 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash -98434317, now seen corresponding path program 21 times [2022-11-23 02:55:42,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:42,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509573968] [2022-11-23 02:55:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:42,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509573968] [2022-11-23 02:55:43,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509573968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856009690] [2022-11-23 02:55:43,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:55:43,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:43,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:43,165 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:43,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 02:55:43,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:55:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:43,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:55:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:43,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:43,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856009690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:43,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:43,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-23 02:55:43,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63830935] [2022-11-23 02:55:43,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 02:55:43,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:43,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 02:55:43,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-23 02:55:44,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:55:44,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 782 transitions, 15125 flow. Second operand has 20 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 02:55:44,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:44,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:55:44,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:46,838 INFO L130 PetriNetUnfolder]: 4712/7296 cut-off events. [2022-11-23 02:55:46,838 INFO L131 PetriNetUnfolder]: For 161259/161280 co-relation queries the response was YES. [2022-11-23 02:55:46,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71257 conditions, 7296 events. 4712/7296 cut-off events. For 161259/161280 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 42305 event pairs, 563 based on Foata normal form. 41/7334 useless extension candidates. Maximal degree in co-relation 71168. Up to 3373 conditions per place. [2022-11-23 02:55:46,940 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 591 selfloop transitions, 303 changer transitions 0/917 dead transitions. [2022-11-23 02:55:46,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 917 transitions, 19072 flow [2022-11-23 02:55:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:55:46,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:55:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1120 transitions. [2022-11-23 02:55:47,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42911877394636017 [2022-11-23 02:55:47,174 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1120 transitions. [2022-11-23 02:55:47,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1120 transitions. [2022-11-23 02:55:47,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:47,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1120 transitions. [2022-11-23 02:55:47,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.44444444444444) internal successors, (1120), 9 states have internal predecessors, (1120), 0 states have call successors, (0), 0 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 02:55:47,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 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 02:55:47,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 290.0) internal successors, (2900), 10 states have internal predecessors, (2900), 0 states have call successors, (0), 0 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 02:55:47,178 INFO L175 Difference]: Start difference. First operand has 276 places, 782 transitions, 15125 flow. Second operand 9 states and 1120 transitions. [2022-11-23 02:55:47,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 917 transitions, 19072 flow [2022-11-23 02:55:48,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 917 transitions, 18690 flow, removed 126 selfloop flow, removed 7 redundant places. [2022-11-23 02:55:48,253 INFO L231 Difference]: Finished difference. Result has 279 places, 784 transitions, 15737 flow [2022-11-23 02:55:48,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=14624, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15737, PETRI_PLACES=279, PETRI_TRANSITIONS=784} [2022-11-23 02:55:48,255 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 249 predicate places. [2022-11-23 02:55:48,255 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 784 transitions, 15737 flow [2022-11-23 02:55:48,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 119.0) internal successors, (2380), 20 states have internal predecessors, (2380), 0 states have call successors, (0), 0 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 02:55:48,256 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:48,256 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, 1, 1] [2022-11-23 02:55:48,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 02:55:48,458 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1634180893, now seen corresponding path program 22 times [2022-11-23 02:55:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:48,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415044273] [2022-11-23 02:55:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:48,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:48,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415044273] [2022-11-23 02:55:48,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415044273] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:48,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766648627] [2022-11-23 02:55:48,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:55:48,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:48,680 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:48,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 02:55:48,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:55:48,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:48,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:55:48,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:48,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:49,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766648627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:49,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:49,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-23 02:55:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577158154] [2022-11-23 02:55:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 02:55:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 02:55:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-23 02:55:49,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 290 [2022-11-23 02:55:49,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 784 transitions, 15737 flow. Second operand has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 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 02:55:49,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:49,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 290 [2022-11-23 02:55:49,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:55:53,828 INFO L130 PetriNetUnfolder]: 4686/7190 cut-off events. [2022-11-23 02:55:53,829 INFO L131 PetriNetUnfolder]: For 159075/159075 co-relation queries the response was YES. [2022-11-23 02:55:53,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71302 conditions, 7190 events. 4686/7190 cut-off events. For 159075/159075 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40730 event pairs, 234 based on Foata normal form. 68/7258 useless extension candidates. Maximal degree in co-relation 71211. Up to 3337 conditions per place. [2022-11-23 02:55:53,927 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 579 selfloop transitions, 600 changer transitions 0/1179 dead transitions. [2022-11-23 02:55:53,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1179 transitions, 24265 flow [2022-11-23 02:55:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 02:55:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-23 02:55:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4443 transitions. [2022-11-23 02:55:53,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4140726933830382 [2022-11-23 02:55:53,933 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4443 transitions. [2022-11-23 02:55:53,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4443 transitions. [2022-11-23 02:55:53,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:55:53,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4443 transitions. [2022-11-23 02:55:53,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 120.08108108108108) internal successors, (4443), 37 states have internal predecessors, (4443), 0 states have call successors, (0), 0 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 02:55:53,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 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 02:55:53,952 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 290.0) internal successors, (11020), 38 states have internal predecessors, (11020), 0 states have call successors, (0), 0 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 02:55:53,952 INFO L175 Difference]: Start difference. First operand has 279 places, 784 transitions, 15737 flow. Second operand 37 states and 4443 transitions. [2022-11-23 02:55:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1179 transitions, 24265 flow [2022-11-23 02:55:55,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1179 transitions, 23814 flow, removed 40 selfloop flow, removed 7 redundant places. [2022-11-23 02:55:55,560 INFO L231 Difference]: Finished difference. Result has 306 places, 893 transitions, 18896 flow [2022-11-23 02:55:55,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=15126, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=477, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=18896, PETRI_PLACES=306, PETRI_TRANSITIONS=893} [2022-11-23 02:55:55,561 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2022-11-23 02:55:55,561 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 893 transitions, 18896 flow [2022-11-23 02:55:55,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 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 02:55:55,562 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:55:55,562 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, 1, 1] [2022-11-23 02:55:55,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 02:55:55,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:55,768 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:55:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:55:55,768 INFO L85 PathProgramCache]: Analyzing trace with hash -484760693, now seen corresponding path program 23 times [2022-11-23 02:55:55,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:55:55,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494826463] [2022-11-23 02:55:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:55:55,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:55:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:55:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:55,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:55:55,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494826463] [2022-11-23 02:55:55,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494826463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:55:55,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193281569] [2022-11-23 02:55:55,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:55:55,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:55:55,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:55:55,970 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:55:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_080e2d29-79b7-4850-8264-9fd030184806/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 02:55:56,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:55:56,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:55:56,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:55:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:55:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:56,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:55:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 02:55:56,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193281569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:55:56,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:55:56,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-23 02:55:56,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578395587] [2022-11-23 02:55:56,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:55:56,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:55:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:55:56,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:55:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:55:56,879 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 290 [2022-11-23 02:55:56,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 893 transitions, 18896 flow. Second operand has 18 states, 18 states have (on average 115.55555555555556) internal successors, (2080), 18 states have internal predecessors, (2080), 0 states have call successors, (0), 0 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 02:55:56,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:55:56,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 290 [2022-11-23 02:55:56,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand