./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN --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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- 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-6b4ec56 [2022-11-20 12:14:07,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:14:07,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:14:07,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:14:07,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:14:07,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:14:07,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:14:07,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:14:07,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:14:07,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:14:07,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:14:07,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:14:07,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:14:07,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:14:07,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:14:07,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:14:07,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:14:07,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:14:07,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:14:07,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:14:07,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:14:07,690 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:14:07,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:14:07,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:14:07,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:14:07,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:14:07,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:14:07,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:14:07,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:14:07,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:14:07,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:14:07,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:14:07,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:14:07,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:14:07,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:14:07,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:14:07,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:14:07,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:14:07,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:14:07,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:14:07,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:14:07,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:14:07,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:14:07,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:14:07,790 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:14:07,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:14:07,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:14:07,792 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:14:07,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:14:07,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:14:07,793 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:14:07,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:14:07,794 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:14:07,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:14:07,794 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:14:07,795 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:14:07,796 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:14:07,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:14:07,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:14:07,796 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:14:07,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:14:07,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:07,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:14:07,797 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:14:07,797 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:14:07,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:14:07,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:14:07,798 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:14:07,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:14:07,798 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:14:07,798 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2022-11-20 12:14:08,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:14:08,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:14:08,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:14:08,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:14:08,076 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:14:08,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-20 12:14:11,237 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:14:11,428 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:14:11,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2022-11-20 12:14:11,451 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/data/5db31d53e/962a815ed29d474d8005a48001c633b5/FLAG4a999658c [2022-11-20 12:14:11,466 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/data/5db31d53e/962a815ed29d474d8005a48001c633b5 [2022-11-20 12:14:11,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:14:11,471 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:14:11,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:11,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:14:11,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:14:11,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,485 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@710682f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11, skipping insertion in model container [2022-11-20 12:14:11,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:14:11,513 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:14:11,685 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_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-20 12:14:11,694 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:11,705 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:14:11,729 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_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2022-11-20 12:14:11,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:14:11,747 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:14:11,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11 WrapperNode [2022-11-20 12:14:11,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:14:11,749 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:11,750 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:14:11,750 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:14:11,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,792 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2022-11-20 12:14:11,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:14:11,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:14:11,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:14:11,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:14:11,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:14:11,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:14:11,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:14:11,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:14:11,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (1/1) ... [2022-11-20 12:14:11,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:14:11,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:11,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:14:11,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:14:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:14:11,948 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 12:14:11,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 12:14:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 12:14:11,949 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 12:14:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:14:11,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:14:11,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:14:11,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:14:11,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:14:11,952 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 12:14:12,061 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:14:12,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:14:12,472 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:14:12,615 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:14:12,628 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 12:14:12,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:12 BoogieIcfgContainer [2022-11-20 12:14:12,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:14:12,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:14:12,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:14:12,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:14:12,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:14:11" (1/3) ... [2022-11-20 12:14:12,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d538435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:12, skipping insertion in model container [2022-11-20 12:14:12,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:14:11" (2/3) ... [2022-11-20 12:14:12,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d538435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:14:12, skipping insertion in model container [2022-11-20 12:14:12,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:14:12" (3/3) ... [2022-11-20 12:14:12,641 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2022-11-20 12:14:12,650 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 12:14:12,662 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:14:12,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 12:14:12,662 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 12:14:12,739 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 12:14:12,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2022-11-20 12:14:12,854 INFO L130 PetriNetUnfolder]: 11/140 cut-off events. [2022-11-20 12:14:12,854 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:14:12,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2022-11-20 12:14:12,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2022-11-20 12:14:12,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2022-11-20 12:14:12,920 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:14:12,930 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;@19e0569a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:14:12,931 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 12:14:13,010 INFO L130 PetriNetUnfolder]: 11/130 cut-off events. [2022-11-20 12:14:13,010 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 12:14:13,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:13,011 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:13,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:13,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1559977782, now seen corresponding path program 1 times [2022-11-20 12:14:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062331381] [2022-11-20 12:14:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:13,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:13,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062331381] [2022-11-20 12:14:13,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062331381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:13,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:13,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:14:13,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141818809] [2022-11-20 12:14:13,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:13,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 12:14:13,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 12:14:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 12:14:13,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2022-11-20 12:14:13,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:13,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:13,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2022-11-20 12:14:13,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:13,483 INFO L130 PetriNetUnfolder]: 11/144 cut-off events. [2022-11-20 12:14:13,483 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-20 12:14:13,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 144 events. 11/144 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 4 based on Foata normal form. 18/152 useless extension candidates. Maximal degree in co-relation 95. Up to 21 conditions per place. [2022-11-20 12:14:13,490 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 9 selfloop transitions, 0 changer transitions 3/124 dead transitions. [2022-11-20 12:14:13,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 278 flow [2022-11-20 12:14:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 12:14:13,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 12:14:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2022-11-20 12:14:13,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9366197183098591 [2022-11-20 12:14:13,517 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2022-11-20 12:14:13,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2022-11-20 12:14:13,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:13,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2022-11-20 12:14:13,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:13,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:13,540 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:13,542 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 274 flow. Second operand 2 states and 266 transitions. [2022-11-20 12:14:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 278 flow [2022-11-20 12:14:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 12:14:13,556 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 246 flow [2022-11-20 12:14:13,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2022-11-20 12:14:13,567 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, -3 predicate places. [2022-11-20 12:14:13,567 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 246 flow [2022-11-20 12:14:13,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:13,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:13,569 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:13,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:14:13,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:13,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:13,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1317567152, now seen corresponding path program 1 times [2022-11-20 12:14:13,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:13,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047250276] [2022-11-20 12:14:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:13,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:14,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:14,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047250276] [2022-11-20 12:14:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047250276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:14,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:14,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:14:14,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406433646] [2022-11-20 12:14:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:14:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:14:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:14:14,093 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2022-11-20 12:14:14,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:14,094 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2022-11-20 12:14:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:14,351 INFO L130 PetriNetUnfolder]: 27/291 cut-off events. [2022-11-20 12:14:14,352 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-20 12:14:14,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 291 events. 27/291 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1046 event pairs, 4 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 359. Up to 34 conditions per place. [2022-11-20 12:14:14,359 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 29 selfloop transitions, 2 changer transitions 4/133 dead transitions. [2022-11-20 12:14:14,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 133 transitions, 343 flow [2022-11-20 12:14:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:14:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 12:14:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2022-11-20 12:14:14,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8112676056338028 [2022-11-20 12:14:14,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2022-11-20 12:14:14,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2022-11-20 12:14:14,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:14,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2022-11-20 12:14:14,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,374 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,374 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 246 flow. Second operand 5 states and 576 transitions. [2022-11-20 12:14:14,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 133 transitions, 343 flow [2022-11-20 12:14:14,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:14,381 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 262 flow [2022-11-20 12:14:14,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2022-11-20 12:14:14,383 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2022-11-20 12:14:14,384 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 262 flow [2022-11-20 12:14:14,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:14,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:14,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:14:14,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash -37819436, now seen corresponding path program 1 times [2022-11-20 12:14:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994748200] [2022-11-20 12:14:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:14,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:14,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:14,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994748200] [2022-11-20 12:14:14,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994748200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:14,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:14,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:14:14,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171885626] [2022-11-20 12:14:14,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:14,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:14:14,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:14:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:14:14,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:14:14,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:14,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:14,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:14:14,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:15,012 INFO L130 PetriNetUnfolder]: 105/445 cut-off events. [2022-11-20 12:14:15,013 INFO L131 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2022-11-20 12:14:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 445 events. 105/445 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1686 event pairs, 46 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 659. Up to 163 conditions per place. [2022-11-20 12:14:15,017 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 27 selfloop transitions, 6 changer transitions 3/137 dead transitions. [2022-11-20 12:14:15,018 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 367 flow [2022-11-20 12:14:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:14:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:14:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2022-11-20 12:14:15,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8609154929577465 [2022-11-20 12:14:15,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2022-11-20 12:14:15,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2022-11-20 12:14:15,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:15,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2022-11-20 12:14:15,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:15,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:15,026 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:15,027 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 262 flow. Second operand 4 states and 489 transitions. [2022-11-20 12:14:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 367 flow [2022-11-20 12:14:15,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 137 transitions, 361 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 12:14:15,033 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 293 flow [2022-11-20 12:14:15,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2022-11-20 12:14:15,036 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2022-11-20 12:14:15,036 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 293 flow [2022-11-20 12:14:15,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:15,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:15,037 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:15,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:14:15,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:15,040 INFO L85 PathProgramCache]: Analyzing trace with hash -430164207, now seen corresponding path program 1 times [2022-11-20 12:14:15,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:15,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059210586] [2022-11-20 12:14:15,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059210586] [2022-11-20 12:14:15,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059210586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:15,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782994427] [2022-11-20 12:14:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:15,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:15,400 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:15,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:14:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:15,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 12:14:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:15,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:14:15,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782994427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:15,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:15,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 9 [2022-11-20 12:14:15,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112544700] [2022-11-20 12:14:15,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:16,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 12:14:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 12:14:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:14:16,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2022-11-20 12:14:16,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 293 flow. Second operand has 9 states, 9 states have (on average 116.33333333333333) internal successors, (1047), 9 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:16,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2022-11-20 12:14:16,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:16,284 INFO L130 PetriNetUnfolder]: 127/527 cut-off events. [2022-11-20 12:14:16,285 INFO L131 PetriNetUnfolder]: For 85/85 co-relation queries the response was YES. [2022-11-20 12:14:16,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 527 events. 127/527 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2348 event pairs, 20 based on Foata normal form. 8/506 useless extension candidates. Maximal degree in co-relation 868. Up to 90 conditions per place. [2022-11-20 12:14:16,290 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 30 selfloop transitions, 6 changer transitions 26/163 dead transitions. [2022-11-20 12:14:16,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 512 flow [2022-11-20 12:14:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:14:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 12:14:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 968 transitions. [2022-11-20 12:14:16,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.852112676056338 [2022-11-20 12:14:16,301 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 968 transitions. [2022-11-20 12:14:16,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 968 transitions. [2022-11-20 12:14:16,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:16,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 968 transitions. [2022-11-20 12:14:16,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.0) internal successors, (968), 8 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,308 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 142.0) internal successors, (1278), 9 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,309 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 293 flow. Second operand 8 states and 968 transitions. [2022-11-20 12:14:16,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 512 flow [2022-11-20 12:14:16,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 512 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:16,316 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 293 flow [2022-11-20 12:14:16,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=293, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-11-20 12:14:16,319 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 9 predicate places. [2022-11-20 12:14:16,319 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 293 flow [2022-11-20 12:14:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 116.33333333333333) internal successors, (1047), 9 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,321 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:16,321 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:16,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:14:16,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:16,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1110080317, now seen corresponding path program 2 times [2022-11-20 12:14:16,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:16,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380934505] [2022-11-20 12:14:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:16,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:16,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:16,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380934505] [2022-11-20 12:14:16,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380934505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:16,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:16,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:14:16,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650395610] [2022-11-20 12:14:16,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:16,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:14:16,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:16,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:14:16,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:14:16,894 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 142 [2022-11-20 12:14:16,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 293 flow. Second operand has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:16,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:16,896 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 142 [2022-11-20 12:14:16,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:17,336 INFO L130 PetriNetUnfolder]: 141/528 cut-off events. [2022-11-20 12:14:17,337 INFO L131 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2022-11-20 12:14:17,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 528 events. 141/528 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2023 event pairs, 30 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 999. Up to 96 conditions per place. [2022-11-20 12:14:17,341 INFO L137 encePairwiseOnDemand]: 130/142 looper letters, 46 selfloop transitions, 7 changer transitions 41/180 dead transitions. [2022-11-20 12:14:17,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 180 transitions, 659 flow [2022-11-20 12:14:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:14:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 12:14:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1071 transitions. [2022-11-20 12:14:17,345 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.754225352112676 [2022-11-20 12:14:17,345 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1071 transitions. [2022-11-20 12:14:17,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1071 transitions. [2022-11-20 12:14:17,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:17,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1071 transitions. [2022-11-20 12:14:17,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.1) internal successors, (1071), 10 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:17,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:17,354 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 142.0) internal successors, (1562), 11 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:17,355 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 293 flow. Second operand 10 states and 1071 transitions. [2022-11-20 12:14:17,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 180 transitions, 659 flow [2022-11-20 12:14:17,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 180 transitions, 614 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-11-20 12:14:17,362 INFO L231 Difference]: Finished difference. Result has 141 places, 125 transitions, 312 flow [2022-11-20 12:14:17,364 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=141, PETRI_TRANSITIONS=125} [2022-11-20 12:14:17,366 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 14 predicate places. [2022-11-20 12:14:17,367 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 125 transitions, 312 flow [2022-11-20 12:14:17,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 101.625) internal successors, (813), 8 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:17,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:17,368 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:17,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:14:17,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:17,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1108097213, now seen corresponding path program 1 times [2022-11-20 12:14:17,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:17,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117209664] [2022-11-20 12:14:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:17,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:14:17,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117209664] [2022-11-20 12:14:17,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117209664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:17,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646473998] [2022-11-20 12:14:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:17,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:17,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:17,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:17,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:14:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 12:14:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:18,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 12:14:19,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:14:19,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:14:19,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 12:14:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:21,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-20 12:14:21,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:21,963 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 153 treesize of output 149 [2022-11-20 12:14:21,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:21,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 137 [2022-11-20 12:14:21,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:21,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 113 [2022-11-20 12:14:22,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:22,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2022-11-20 12:14:22,331 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 12:14:22,331 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 325 treesize of output 297 [2022-11-20 12:14:22,362 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 12:14:22,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 249 [2022-11-20 12:14:22,381 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-20 12:14:22,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 225 [2022-11-20 12:14:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:23,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646473998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:23,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:23,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28, 25] total 52 [2022-11-20 12:14:23,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850623264] [2022-11-20 12:14:23,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-20 12:14:23,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-20 12:14:23,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2160, Unknown=27, NotChecked=0, Total=2652 [2022-11-20 12:14:23,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2022-11-20 12:14:23,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 125 transitions, 312 flow. Second operand has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:23,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:23,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2022-11-20 12:14:23,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:28,877 INFO L130 PetriNetUnfolder]: 912/1929 cut-off events. [2022-11-20 12:14:28,878 INFO L131 PetriNetUnfolder]: For 369/369 co-relation queries the response was YES. [2022-11-20 12:14:28,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4122 conditions, 1929 events. 912/1929 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 11584 event pairs, 84 based on Foata normal form. 11/1878 useless extension candidates. Maximal degree in co-relation 4110. Up to 305 conditions per place. [2022-11-20 12:14:28,941 INFO L137 encePairwiseOnDemand]: 106/142 looper letters, 210 selfloop transitions, 88 changer transitions 21/369 dead transitions. [2022-11-20 12:14:28,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 369 transitions, 1626 flow [2022-11-20 12:14:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 12:14:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-20 12:14:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3236 transitions. [2022-11-20 12:14:28,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43824485373781147 [2022-11-20 12:14:28,951 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3236 transitions. [2022-11-20 12:14:28,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3236 transitions. [2022-11-20 12:14:28,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:28,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3236 transitions. [2022-11-20 12:14:28,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 62.23076923076923) internal successors, (3236), 52 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:28,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:28,978 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 142.0) internal successors, (7526), 53 states have internal predecessors, (7526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:28,978 INFO L175 Difference]: Start difference. First operand has 141 places, 125 transitions, 312 flow. Second operand 52 states and 3236 transitions. [2022-11-20 12:14:28,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 369 transitions, 1626 flow [2022-11-20 12:14:28,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 369 transitions, 1558 flow, removed 27 selfloop flow, removed 6 redundant places. [2022-11-20 12:14:28,989 INFO L231 Difference]: Finished difference. Result has 216 places, 205 transitions, 993 flow [2022-11-20 12:14:28,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=993, PETRI_PLACES=216, PETRI_TRANSITIONS=205} [2022-11-20 12:14:28,990 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 89 predicate places. [2022-11-20 12:14:28,990 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 205 transitions, 993 flow [2022-11-20 12:14:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 59.26923076923077) internal successors, (3082), 52 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:28,992 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:28,992 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:29,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:29,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 12:14:29,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 671312538, now seen corresponding path program 1 times [2022-11-20 12:14:29,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:29,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469065730] [2022-11-20 12:14:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:29,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:14:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469065730] [2022-11-20 12:14:29,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469065730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:29,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:29,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:14:29,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979560053] [2022-11-20 12:14:29,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:29,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:14:29,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:14:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:14:29,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-11-20 12:14:29,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 205 transitions, 993 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:29,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-11-20 12:14:29,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:29,509 INFO L130 PetriNetUnfolder]: 128/602 cut-off events. [2022-11-20 12:14:29,509 INFO L131 PetriNetUnfolder]: For 3368/3580 co-relation queries the response was YES. [2022-11-20 12:14:29,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 602 events. 128/602 cut-off events. For 3368/3580 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2822 event pairs, 28 based on Foata normal form. 28/592 useless extension candidates. Maximal degree in co-relation 1709. Up to 175 conditions per place. [2022-11-20 12:14:29,517 INFO L137 encePairwiseOnDemand]: 139/142 looper letters, 55 selfloop transitions, 2 changer transitions 0/200 dead transitions. [2022-11-20 12:14:29,518 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 200 transitions, 1066 flow [2022-11-20 12:14:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:14:29,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 12:14:29,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2022-11-20 12:14:29,520 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8990610328638498 [2022-11-20 12:14:29,520 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2022-11-20 12:14:29,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2022-11-20 12:14:29,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:29,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2022-11-20 12:14:29,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,523 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,523 INFO L175 Difference]: Start difference. First operand has 216 places, 205 transitions, 993 flow. Second operand 3 states and 383 transitions. [2022-11-20 12:14:29,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 200 transitions, 1066 flow [2022-11-20 12:14:29,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 200 transitions, 954 flow, removed 37 selfloop flow, removed 17 redundant places. [2022-11-20 12:14:29,540 INFO L231 Difference]: Finished difference. Result has 199 places, 197 transitions, 829 flow [2022-11-20 12:14:29,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=829, PETRI_PLACES=199, PETRI_TRANSITIONS=197} [2022-11-20 12:14:29,542 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 72 predicate places. [2022-11-20 12:14:29,542 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 197 transitions, 829 flow [2022-11-20 12:14:29,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:29,543 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:29,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:14:29,543 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:29,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:29,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1534411115, now seen corresponding path program 2 times [2022-11-20 12:14:29,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:29,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114566032] [2022-11-20 12:14:29,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:29,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 12:14:29,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:29,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114566032] [2022-11-20 12:14:29,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114566032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:29,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:29,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:14:29,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509941250] [2022-11-20 12:14:29,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:29,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:14:29,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:29,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:14:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:14:29,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2022-11-20 12:14:29,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 197 transitions, 829 flow. Second operand has 6 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:29,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:29,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2022-11-20 12:14:29,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:30,362 INFO L130 PetriNetUnfolder]: 595/1855 cut-off events. [2022-11-20 12:14:30,362 INFO L131 PetriNetUnfolder]: For 9385/9403 co-relation queries the response was YES. [2022-11-20 12:14:30,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6287 conditions, 1855 events. 595/1855 cut-off events. For 9385/9403 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 11170 event pairs, 151 based on Foata normal form. 11/1773 useless extension candidates. Maximal degree in co-relation 6245. Up to 564 conditions per place. [2022-11-20 12:14:30,387 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 121 selfloop transitions, 70 changer transitions 0/316 dead transitions. [2022-11-20 12:14:30,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 316 transitions, 1996 flow [2022-11-20 12:14:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:14:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 12:14:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 848 transitions. [2022-11-20 12:14:30,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8531187122736419 [2022-11-20 12:14:30,390 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 848 transitions. [2022-11-20 12:14:30,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 848 transitions. [2022-11-20 12:14:30,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:30,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 848 transitions. [2022-11-20 12:14:30,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.14285714285714) internal successors, (848), 7 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,397 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 142.0) internal successors, (1136), 8 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,397 INFO L175 Difference]: Start difference. First operand has 199 places, 197 transitions, 829 flow. Second operand 7 states and 848 transitions. [2022-11-20 12:14:30,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 316 transitions, 1996 flow [2022-11-20 12:14:30,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 316 transitions, 1994 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 12:14:30,423 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 1565 flow [2022-11-20 12:14:30,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1565, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2022-11-20 12:14:30,426 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 82 predicate places. [2022-11-20 12:14:30,427 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 1565 flow [2022-11-20 12:14:30,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.5) internal successors, (699), 6 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:30,428 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:30,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 12:14:30,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:30,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1379672248, now seen corresponding path program 3 times [2022-11-20 12:14:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:30,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170163394] [2022-11-20 12:14:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 12:14:30,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:30,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170163394] [2022-11-20 12:14:30,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170163394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:14:30,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:14:30,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:14:30,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885930740] [2022-11-20 12:14:30,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:14:30,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:14:30,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:30,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:14:30,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:14:30,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2022-11-20 12:14:30,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 1565 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:30,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:30,700 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2022-11-20 12:14:30,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:31,128 INFO L130 PetriNetUnfolder]: 316/1506 cut-off events. [2022-11-20 12:14:31,129 INFO L131 PetriNetUnfolder]: For 7886/8084 co-relation queries the response was YES. [2022-11-20 12:14:31,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4778 conditions, 1506 events. 316/1506 cut-off events. For 7886/8084 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 9704 event pairs, 100 based on Foata normal form. 133/1562 useless extension candidates. Maximal degree in co-relation 4731. Up to 301 conditions per place. [2022-11-20 12:14:31,145 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 102 selfloop transitions, 4 changer transitions 0/257 dead transitions. [2022-11-20 12:14:31,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 257 transitions, 1689 flow [2022-11-20 12:14:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:14:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 12:14:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2022-11-20 12:14:31,148 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8855633802816901 [2022-11-20 12:14:31,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2022-11-20 12:14:31,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2022-11-20 12:14:31,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:31,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2022-11-20 12:14:31,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,152 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 1565 flow. Second operand 4 states and 503 transitions. [2022-11-20 12:14:31,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 257 transitions, 1689 flow [2022-11-20 12:14:31,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 257 transitions, 1637 flow, removed 26 selfloop flow, removed 0 redundant places. [2022-11-20 12:14:31,174 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 1380 flow [2022-11-20 12:14:31,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1380, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2022-11-20 12:14:31,175 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 87 predicate places. [2022-11-20 12:14:31,176 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 1380 flow [2022-11-20 12:14:31,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:31,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:31,177 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:31,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 12:14:31,177 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:31,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:31,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1019837311, now seen corresponding path program 1 times [2022-11-20 12:14:31,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:31,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312188776] [2022-11-20 12:14:31,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:31,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 12:14:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312188776] [2022-11-20 12:14:31,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312188776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881723799] [2022-11-20 12:14:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:31,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:31,559 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:31,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:14:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 12:14:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:14:32,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 12:14:32,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881723799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:32,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:32,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 30 [2022-11-20 12:14:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048044562] [2022-11-20 12:14:32,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:32,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 12:14:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 12:14:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-11-20 12:14:32,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 142 [2022-11-20 12:14:32,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 1380 flow. Second operand has 30 states, 30 states have (on average 97.93333333333334) internal successors, (2938), 30 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:32,646 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:32,646 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 142 [2022-11-20 12:14:32,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:33,932 INFO L130 PetriNetUnfolder]: 419/1576 cut-off events. [2022-11-20 12:14:33,932 INFO L131 PetriNetUnfolder]: For 8023/8036 co-relation queries the response was YES. [2022-11-20 12:14:33,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5740 conditions, 1576 events. 419/1576 cut-off events. For 8023/8036 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8951 event pairs, 259 based on Foata normal form. 22/1551 useless extension candidates. Maximal degree in co-relation 5690. Up to 822 conditions per place. [2022-11-20 12:14:33,951 INFO L137 encePairwiseOnDemand]: 123/142 looper letters, 88 selfloop transitions, 12 changer transitions 27/218 dead transitions. [2022-11-20 12:14:33,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 218 transitions, 1339 flow [2022-11-20 12:14:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:14:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-20 12:14:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1974 transitions. [2022-11-20 12:14:33,958 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6950704225352112 [2022-11-20 12:14:33,959 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1974 transitions. [2022-11-20 12:14:33,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1974 transitions. [2022-11-20 12:14:33,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:33,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1974 transitions. [2022-11-20 12:14:33,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 98.7) internal successors, (1974), 20 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,974 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 142.0) internal successors, (2982), 21 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,974 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 1380 flow. Second operand 20 states and 1974 transitions. [2022-11-20 12:14:33,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 218 transitions, 1339 flow [2022-11-20 12:14:33,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 218 transitions, 1304 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-20 12:14:33,993 INFO L231 Difference]: Finished difference. Result has 227 places, 187 transitions, 939 flow [2022-11-20 12:14:33,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=939, PETRI_PLACES=227, PETRI_TRANSITIONS=187} [2022-11-20 12:14:33,995 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 100 predicate places. [2022-11-20 12:14:33,995 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 187 transitions, 939 flow [2022-11-20 12:14:33,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.93333333333334) internal successors, (2938), 30 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:33,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:33,997 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:34,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 12:14:34,204 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:34,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:34,204 INFO L85 PathProgramCache]: Analyzing trace with hash 27946057, now seen corresponding path program 2 times [2022-11-20 12:14:34,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:34,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840329272] [2022-11-20 12:14:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:34,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:35,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840329272] [2022-11-20 12:14:35,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840329272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:35,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248817309] [2022-11-20 12:14:35,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:14:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:35,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:35,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:14:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:14:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:35,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:14:35,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:37,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:37,883 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 49 treesize of output 15 [2022-11-20 12:14:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:38,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:39,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:14:39,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 78 [2022-11-20 12:14:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:14:41,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248817309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:41,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:41,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 30, 30] total 67 [2022-11-20 12:14:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292343184] [2022-11-20 12:14:41,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:41,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 12:14:41,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 12:14:41,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=3884, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 12:14:41,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2022-11-20 12:14:41,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 187 transitions, 939 flow. Second operand has 67 states, 67 states have (on average 72.02985074626865) internal successors, (4826), 67 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:41,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:41,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2022-11-20 12:14:41,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:14:55,768 INFO L130 PetriNetUnfolder]: 4717/10514 cut-off events. [2022-11-20 12:14:55,768 INFO L131 PetriNetUnfolder]: For 73112/73112 co-relation queries the response was YES. [2022-11-20 12:14:55,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43800 conditions, 10514 events. 4717/10514 cut-off events. For 73112/73112 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 86117 event pairs, 226 based on Foata normal form. 12/10340 useless extension candidates. Maximal degree in co-relation 43747. Up to 1512 conditions per place. [2022-11-20 12:14:55,929 INFO L137 encePairwiseOnDemand]: 113/142 looper letters, 701 selfloop transitions, 249 changer transitions 48/1059 dead transitions. [2022-11-20 12:14:55,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 1059 transitions, 10030 flow [2022-11-20 12:14:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-20 12:14:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2022-11-20 12:14:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 9548 transitions. [2022-11-20 12:14:55,945 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5294443828324277 [2022-11-20 12:14:55,945 INFO L72 ComplementDD]: Start complementDD. Operand 127 states and 9548 transitions. [2022-11-20 12:14:55,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 9548 transitions. [2022-11-20 12:14:55,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:14:55,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 127 states and 9548 transitions. [2022-11-20 12:14:55,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 128 states, 127 states have (on average 75.18110236220473) internal successors, (9548), 127 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:55,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 128 states, 128 states have (on average 142.0) internal successors, (18176), 128 states have internal predecessors, (18176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:56,003 INFO L81 ComplementDD]: Finished complementDD. Result has 128 states, 128 states have (on average 142.0) internal successors, (18176), 128 states have internal predecessors, (18176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:56,004 INFO L175 Difference]: Start difference. First operand has 227 places, 187 transitions, 939 flow. Second operand 127 states and 9548 transitions. [2022-11-20 12:14:56,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 1059 transitions, 10030 flow [2022-11-20 12:14:56,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1059 transitions, 9479 flow, removed 267 selfloop flow, removed 17 redundant places. [2022-11-20 12:14:56,084 INFO L231 Difference]: Finished difference. Result has 389 places, 412 transitions, 3866 flow [2022-11-20 12:14:56,084 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=127, PETRI_FLOW=3866, PETRI_PLACES=389, PETRI_TRANSITIONS=412} [2022-11-20 12:14:56,085 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 262 predicate places. [2022-11-20 12:14:56,085 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 412 transitions, 3866 flow [2022-11-20 12:14:56,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 72.02985074626865) internal successors, (4826), 67 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:56,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:14:56,087 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:14:56,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:14:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 12:14:56,295 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:14:56,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:14:56,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1948669753, now seen corresponding path program 3 times [2022-11-20 12:14:56,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:14:56,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764519957] [2022-11-20 12:14:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:14:56,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:14:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:14:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:56,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:14:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764519957] [2022-11-20 12:14:56,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764519957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:14:56,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848988081] [2022-11-20 12:14:56,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:14:56,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:14:56,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:14:56,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:14:56,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:14:56,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:14:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:14:56,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 12:14:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:14:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:57,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:14:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:14:57,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848988081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:14:57,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:14:57,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2022-11-20 12:14:57,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092599081] [2022-11-20 12:14:57,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:14:57,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:14:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:14:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:14:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:14:57,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2022-11-20 12:14:57,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 412 transitions, 3866 flow. Second operand has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:14:57,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:14:57,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2022-11-20 12:14:57,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:15:03,804 INFO L130 PetriNetUnfolder]: 3931/13153 cut-off events. [2022-11-20 12:15:03,804 INFO L131 PetriNetUnfolder]: For 162524/162949 co-relation queries the response was YES. [2022-11-20 12:15:03,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59628 conditions, 13153 events. 3931/13153 cut-off events. For 162524/162949 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 134613 event pairs, 496 based on Foata normal form. 292/12806 useless extension candidates. Maximal degree in co-relation 59509. Up to 1339 conditions per place. [2022-11-20 12:15:04,054 INFO L137 encePairwiseOnDemand]: 128/142 looper letters, 406 selfloop transitions, 339 changer transitions 62/982 dead transitions. [2022-11-20 12:15:04,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 982 transitions, 11425 flow [2022-11-20 12:15:04,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 12:15:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 12:15:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4510 transitions. [2022-11-20 12:15:04,062 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8143734200072228 [2022-11-20 12:15:04,062 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4510 transitions. [2022-11-20 12:15:04,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4510 transitions. [2022-11-20 12:15:04,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:15:04,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4510 transitions. [2022-11-20 12:15:04,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 115.64102564102564) internal successors, (4510), 39 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:04,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:04,083 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:04,083 INFO L175 Difference]: Start difference. First operand has 389 places, 412 transitions, 3866 flow. Second operand 39 states and 4510 transitions. [2022-11-20 12:15:04,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 982 transitions, 11425 flow [2022-11-20 12:15:04,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 982 transitions, 10012 flow, removed 667 selfloop flow, removed 17 redundant places. [2022-11-20 12:15:04,979 INFO L231 Difference]: Finished difference. Result has 424 places, 653 transitions, 6452 flow [2022-11-20 12:15:04,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=6452, PETRI_PLACES=424, PETRI_TRANSITIONS=653} [2022-11-20 12:15:04,980 INFO L288 CegarLoopForPetriNet]: 127 programPoint places, 297 predicate places. [2022-11-20 12:15:04,980 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 653 transitions, 6452 flow [2022-11-20 12:15:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 111.4) internal successors, (2228), 20 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:04,981 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 12:15:04,981 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:15:04,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:15:05,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:05,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 12:15:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:15:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash 447308769, now seen corresponding path program 4 times [2022-11-20 12:15:05,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:15:05,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525431256] [2022-11-20 12:15:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:15:05,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:15:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:15:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:15:06,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:15:06,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525431256] [2022-11-20 12:15:06,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525431256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:15:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25266355] [2022-11-20 12:15:06,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:15:06,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:15:06,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:15:06,206 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:15:06,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77fc0ada-8cc2-4d26-a6e3-db447d546d3a/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:15:06,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:15:06,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:15:06,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:15:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:15:08,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:08,369 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 49 treesize of output 15 [2022-11-20 12:15:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:08,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:15:09,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:15:09,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2022-11-20 12:15:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:15:11,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25266355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:15:11,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:15:11,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 67 [2022-11-20 12:15:11,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893336862] [2022-11-20 12:15:11,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:15:11,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-20 12:15:11,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:15:11,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-20 12:15:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=3862, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 12:15:11,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2022-11-20 12:15:11,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 653 transitions, 6452 flow. Second operand has 67 states, 67 states have (on average 72.02985074626865) internal successors, (4826), 67 states have internal predecessors, (4826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:15:11,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 12:15:11,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2022-11-20 12:15:11,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 12:16:25,143 INFO L130 PetriNetUnfolder]: 30779/75005 cut-off events. [2022-11-20 12:16:25,144 INFO L131 PetriNetUnfolder]: For 1276439/1276779 co-relation queries the response was YES. [2022-11-20 12:16:26,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403846 conditions, 75005 events. 30779/75005 cut-off events. For 1276439/1276779 co-relation queries the response was YES. Maximal size of possible extension queue 1969. Compared 916941 event pairs, 3198 based on Foata normal form. 165/72412 useless extension candidates. Maximal degree in co-relation 403714. Up to 11934 conditions per place. [2022-11-20 12:16:27,321 INFO L137 encePairwiseOnDemand]: 113/142 looper letters, 1430 selfloop transitions, 2310 changer transitions 138/4021 dead transitions. [2022-11-20 12:16:27,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 4021 transitions, 60812 flow [2022-11-20 12:16:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 344 states. [2022-11-20 12:16:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2022-11-20 12:16:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 25503 transitions. [2022-11-20 12:16:27,374 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5220889289223715 [2022-11-20 12:16:27,374 INFO L72 ComplementDD]: Start complementDD. Operand 344 states and 25503 transitions. [2022-11-20 12:16:27,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 344 states and 25503 transitions. [2022-11-20 12:16:27,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 12:16:27,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 344 states and 25503 transitions. [2022-11-20 12:16:27,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 345 states, 344 states have (on average 74.13662790697674) internal successors, (25503), 344 states have internal predecessors, (25503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:27,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 345 states, 345 states have (on average 142.0) internal successors, (48990), 345 states have internal predecessors, (48990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:27,534 INFO L81 ComplementDD]: Finished complementDD. Result has 345 states, 345 states have (on average 142.0) internal successors, (48990), 345 states have internal predecessors, (48990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:16:27,535 INFO L175 Difference]: Start difference. First operand has 424 places, 653 transitions, 6452 flow. Second operand 344 states and 25503 transitions. [2022-11-20 12:16:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 4021 transitions, 60812 flow