./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:48:34,675 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:48:34,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:48:34,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:48:34,729 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:48:34,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:48:34,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:48:34,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:48:34,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:48:34,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:48:34,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:48:34,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:48:34,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:48:34,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:48:34,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:48:34,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:48:34,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:48:34,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:48:34,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:48:34,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:48:34,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:48:34,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:48:34,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:48:34,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:48:34,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:48:34,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:48:34,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:48:34,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:48:34,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:48:34,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:48:34,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:48:34,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:48:34,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:48:34,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:48:34,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:48:34,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:48:34,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:48:34,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:48:34,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:48:34,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:48:34,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:48:34,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:48:34,851 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:48:34,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:48:34,852 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:48:34,852 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:48:34,853 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:48:34,853 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:48:34,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:48:34,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:48:34,854 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:48:34,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:48:34,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:48:34,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:48:34,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:48:34,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:48:34,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:48:34,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:48:34,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:48:34,857 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:48:34,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:48:34,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:48:34,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:48:34,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:48:34,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:48:34,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:48:34,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:48:34,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:48:34,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:48:34,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:48:34,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:48:34,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:48:34,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:48:34,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:48:34,861 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:48:34,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:48:34,861 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87860dbf851812846995aa918799e2b576306268e8c461660702f868d3b2804 [2022-11-23 02:48:35,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:48:35,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:48:35,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:48:35,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:48:35,152 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:48:35,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-23 02:48:38,235 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:48:38,465 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:48:38,466 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c [2022-11-23 02:48:38,474 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/data/e4f13a777/59b081672be34096a2f1ddced160a4e1/FLAGe8b41928f [2022-11-23 02:48:38,499 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/data/e4f13a777/59b081672be34096a2f1ddced160a4e1 [2022-11-23 02:48:38,502 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:48:38,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:48:38,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:48:38,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:48:38,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:48:38,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1b03e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38, skipping insertion in model container [2022-11-23 02:48:38,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:48:38,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:48:38,792 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_53e6097d-25d9-4952-8e24-0196dc710cae/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-23 02:48:38,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:48:38,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:48:38,867 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_53e6097d-25d9-4952-8e24-0196dc710cae/sv-benchmarks/c/weaver/popl20-more-max-array.wvr.c[2553,2566] [2022-11-23 02:48:38,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:48:38,889 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:48:38,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38 WrapperNode [2022-11-23 02:48:38,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:48:38,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:48:38,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:48:38,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:48:38,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,957 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 101 [2022-11-23 02:48:38,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:48:38,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:48:38,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:48:38,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:48:38,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:38,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,016 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:48:39,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:48:39,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:48:39,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:48:39,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (1/1) ... [2022-11-23 02:48:39,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:48:39,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:39,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:48:39,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:48:39,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:48:39,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:48:39,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:48:39,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:48:39,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:48:39,120 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 02:48:39,120 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 02:48:39,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:48:39,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:48:39,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:48:39,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:48:39,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:48:39,123 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:48:39,226 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:48:39,228 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:48:39,665 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:48:39,769 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:48:39,770 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 02:48:39,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:39 BoogieIcfgContainer [2022-11-23 02:48:39,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:48:39,776 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:48:39,776 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:48:39,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:48:39,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:48:38" (1/3) ... [2022-11-23 02:48:39,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eb869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:39, skipping insertion in model container [2022-11-23 02:48:39,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:48:38" (2/3) ... [2022-11-23 02:48:39,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eb869a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:48:39, skipping insertion in model container [2022-11-23 02:48:39,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:48:39" (3/3) ... [2022-11-23 02:48:39,784 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2022-11-23 02:48:39,793 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 02:48:39,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:48:39,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:48:39,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:48:39,949 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-23 02:48:40,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 153 transitions, 330 flow [2022-11-23 02:48:40,130 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-11-23 02:48:40,132 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:48:40,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 150 events. 12/150 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-11-23 02:48:40,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 153 transitions, 330 flow [2022-11-23 02:48:40,146 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 137 places, 139 transitions, 296 flow [2022-11-23 02:48:40,150 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:48:40,174 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 137 places, 139 transitions, 296 flow [2022-11-23 02:48:40,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 137 places, 139 transitions, 296 flow [2022-11-23 02:48:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 139 transitions, 296 flow [2022-11-23 02:48:40,244 INFO L130 PetriNetUnfolder]: 12/139 cut-off events. [2022-11-23 02:48:40,248 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:48:40,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 12/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 112. Up to 2 conditions per place. [2022-11-23 02:48:40,253 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2022-11-23 02:48:46,646 INFO L134 LiptonReduction]: Checked pairs total: 1518 [2022-11-23 02:48:46,646 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-11-23 02:48:46,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:48:46,667 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;@27ab5587, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:48:46,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-23 02:48:46,674 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-23 02:48:46,674 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-23 02:48:46,675 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:46,675 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:46,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:48:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:46,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2053952214, now seen corresponding path program 1 times [2022-11-23 02:48:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:46,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951826282] [2022-11-23 02:48:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:47,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951826282] [2022-11-23 02:48:47,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951826282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:47,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:47,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:48:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654326720] [2022-11-23 02:48:47,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:48:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:47,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:48:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:48:47,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 290 [2022-11-23 02:48:47,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:47,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:47,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 290 [2022-11-23 02:48:47,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:47,583 INFO L130 PetriNetUnfolder]: 269/376 cut-off events. [2022-11-23 02:48:47,584 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-23 02:48:47,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 376 events. 269/376 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1109 event pairs, 117 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 593. Up to 367 conditions per place. [2022-11-23 02:48:47,589 INFO L137 encePairwiseOnDemand]: 287/290 looper letters, 20 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-11-23 02:48:47,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 112 flow [2022-11-23 02:48:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:48:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:48:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2022-11-23 02:48:47,606 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46781609195402296 [2022-11-23 02:48:47,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2022-11-23 02:48:47,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2022-11-23 02:48:47,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:47,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2022-11-23 02:48:47,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:47,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:47,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:47,630 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 407 transitions. [2022-11-23 02:48:47,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 112 flow [2022-11-23 02:48:47,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 100 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-23 02:48:47,636 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2022-11-23 02:48:47,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2022-11-23 02:48:47,641 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-23 02:48:47,642 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2022-11-23 02:48:47,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:47,642 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:47,642 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:47,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 02:48:47,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:48:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:47,644 INFO L85 PathProgramCache]: Analyzing trace with hash -294000722, now seen corresponding path program 1 times [2022-11-23 02:48:47,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273257671] [2022-11-23 02:48:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:47,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:47,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273257671] [2022-11-23 02:48:47,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273257671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:47,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767481962] [2022-11-23 02:48:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:47,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:47,815 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:48:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:47,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:48:47,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:48,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:48,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767481962] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:48,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:48,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2022-11-23 02:48:48,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623948451] [2022-11-23 02:48:48,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:48,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:48:48,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:48,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:48:48,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:48:48,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-11-23 02:48:48,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:48,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-11-23 02:48:48,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:48,309 INFO L130 PetriNetUnfolder]: 309/442 cut-off events. [2022-11-23 02:48:48,309 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:48:48,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 900 conditions, 442 events. 309/442 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1396 event pairs, 49 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 889. Up to 335 conditions per place. [2022-11-23 02:48:48,313 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2022-11-23 02:48:48,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 154 flow [2022-11-23 02:48:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:48:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:48:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2022-11-23 02:48:48,317 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4475862068965517 [2022-11-23 02:48:48,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2022-11-23 02:48:48,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2022-11-23 02:48:48,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:48,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2022-11-23 02:48:48,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,326 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 290.0) internal successors, (1740), 6 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,326 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 649 transitions. [2022-11-23 02:48:48,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 154 flow [2022-11-23 02:48:48,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 150 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:48:48,328 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 78 flow [2022-11-23 02:48:48,328 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2022-11-23 02:48:48,329 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2022-11-23 02:48:48,329 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 78 flow [2022-11-23 02:48:48,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:48,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:48,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:48,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:48,536 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:48:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:48,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1887343049, now seen corresponding path program 1 times [2022-11-23 02:48:48,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003095210] [2022-11-23 02:48:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:48,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:48,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:48,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003095210] [2022-11-23 02:48:48,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003095210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:48,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859645004] [2022-11-23 02:48:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:48,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:48,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:48,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:48,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:48:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:48:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:49,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:49,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859645004] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:49,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:49,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2022-11-23 02:48:49,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027282855] [2022-11-23 02:48:49,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:49,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 02:48:49,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:49,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 02:48:49,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:48:49,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:48:49,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:49,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:49,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:48:49,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:49,469 INFO L130 PetriNetUnfolder]: 409/609 cut-off events. [2022-11-23 02:48:49,470 INFO L131 PetriNetUnfolder]: For 106/151 co-relation queries the response was YES. [2022-11-23 02:48:49,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425 conditions, 609 events. 409/609 cut-off events. For 106/151 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2015 event pairs, 138 based on Foata normal form. 45/485 useless extension candidates. Maximal degree in co-relation 1407. Up to 345 conditions per place. [2022-11-23 02:48:49,475 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 52 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2022-11-23 02:48:49,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 62 transitions, 300 flow [2022-11-23 02:48:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:48:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:48:49,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 877 transitions. [2022-11-23 02:48:49,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4320197044334975 [2022-11-23 02:48:49,479 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 877 transitions. [2022-11-23 02:48:49,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 877 transitions. [2022-11-23 02:48:49,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:49,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 877 transitions. [2022-11-23 02:48:49,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:49,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:49,487 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:49,487 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 78 flow. Second operand 7 states and 877 transitions. [2022-11-23 02:48:49,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 62 transitions, 300 flow [2022-11-23 02:48:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 62 transitions, 283 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-23 02:48:49,490 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 120 flow [2022-11-23 02:48:49,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=120, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-11-23 02:48:49,491 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-11-23 02:48:49,491 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 120 flow [2022-11-23 02:48:49,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:49,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:49,492 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:49,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:49,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:49,705 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:48:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash 752428755, now seen corresponding path program 2 times [2022-11-23 02:48:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:49,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353521778] [2022-11-23 02:48:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:49,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:49,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:49,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353521778] [2022-11-23 02:48:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353521778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:49,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24162243] [2022-11-23 02:48:49,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:48:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:49,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:49,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:48:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:48:49,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:48:49,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:48:49,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:48:50,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:50,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24162243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:50,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 02:48:50,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-23 02:48:50,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313115859] [2022-11-23 02:48:50,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:50,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:48:50,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:48:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:48:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:48:50,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 290 [2022-11-23 02:48:50,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:50,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 290 [2022-11-23 02:48:50,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:50,285 INFO L130 PetriNetUnfolder]: 325/477 cut-off events. [2022-11-23 02:48:50,285 INFO L131 PetriNetUnfolder]: For 237/267 co-relation queries the response was YES. [2022-11-23 02:48:50,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 477 events. 325/477 cut-off events. For 237/267 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1501 event pairs, 123 based on Foata normal form. 56/426 useless extension candidates. Maximal degree in co-relation 1357. Up to 346 conditions per place. [2022-11-23 02:48:50,290 INFO L137 encePairwiseOnDemand]: 286/290 looper letters, 34 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2022-11-23 02:48:50,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 228 flow [2022-11-23 02:48:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:48:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:48:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2022-11-23 02:48:50,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4663793103448276 [2022-11-23 02:48:50,293 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2022-11-23 02:48:50,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2022-11-23 02:48:50,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:50,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2022-11-23 02:48:50,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,298 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 290.0) internal successors, (1450), 5 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,298 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 120 flow. Second operand 4 states and 541 transitions. [2022-11-23 02:48:50,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 228 flow [2022-11-23 02:48:50,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 42 transitions, 217 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-23 02:48:50,304 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 125 flow [2022-11-23 02:48:50,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=125, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2022-11-23 02:48:50,306 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 9 predicate places. [2022-11-23 02:48:50,306 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 125 flow [2022-11-23 02:48:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,307 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:50,307 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:50,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-23 02:48:50,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-23 02:48:50,513 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:48:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:50,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1630751154, now seen corresponding path program 1 times [2022-11-23 02:48:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:48:50,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647718842] [2022-11-23 02:48:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:48:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:51,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:48:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647718842] [2022-11-23 02:48:51,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647718842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:48:51,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600800419] [2022-11-23 02:48:51,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:51,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:48:51,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:48:51,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:48:51,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:48:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 02:48:51,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:51,952 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 11 treesize of output 7 [2022-11-23 02:48:52,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 02:48:52,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:48:52,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-23 02:48:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:48:52,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-23 02:48:52,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:48:52,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:48:52,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 39 [2022-11-23 02:48:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:52,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:53,033 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse1))) (or (= c_~max1~0 .cse0) (not (< c_~max2~0 .cse0))))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_201 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (< c_~max2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_201) c_~A~0.base) .cse1)))))) is different from false [2022-11-23 02:48:59,498 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:49:07,960 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:49:08,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:08,053 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 78 treesize of output 54 [2022-11-23 02:49:08,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:08,068 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 343 treesize of output 329 [2022-11-23 02:49:08,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 234 [2022-11-23 02:49:08,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 210 [2022-11-23 02:49:08,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:08,107 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 239 treesize of output 233 [2022-11-23 02:49:08,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:08,709 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 88 treesize of output 64 [2022-11-23 02:49:08,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:49:08,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:49:08,731 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:49:08,731 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 83 treesize of output 67 [2022-11-23 02:49:08,749 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:49:08,754 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 47 treesize of output 37 [2022-11-23 02:49:08,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:08,813 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 55 treesize of output 43 [2022-11-23 02:49:08,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:49:08,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 02:49:08,829 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:49:08,830 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 51 treesize of output 43 [2022-11-23 02:49:08,844 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:49:08,845 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 23 treesize of output 19 [2022-11-23 02:49:08,873 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 02:49:08,874 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 108 treesize of output 1 [2022-11-23 02:49:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:08,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600800419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:08,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:08,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2022-11-23 02:49:08,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903826443] [2022-11-23 02:49:08,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 02:49:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 02:49:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=626, Unknown=17, NotChecked=52, Total=812 [2022-11-23 02:49:09,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 290 [2022-11-23 02:49:09,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 125 flow. Second operand has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:09,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:09,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 290 [2022-11-23 02:49:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:11,565 INFO L130 PetriNetUnfolder]: 827/1218 cut-off events. [2022-11-23 02:49:11,565 INFO L131 PetriNetUnfolder]: For 1263/1276 co-relation queries the response was YES. [2022-11-23 02:49:11,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 1218 events. 827/1218 cut-off events. For 1263/1276 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4881 event pairs, 60 based on Foata normal form. 14/993 useless extension candidates. Maximal degree in co-relation 3396. Up to 735 conditions per place. [2022-11-23 02:49:11,574 INFO L137 encePairwiseOnDemand]: 271/290 looper letters, 84 selfloop transitions, 56 changer transitions 2/144 dead transitions. [2022-11-23 02:49:11,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 144 transitions, 857 flow [2022-11-23 02:49:11,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 02:49:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 02:49:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1003 transitions. [2022-11-23 02:49:11,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31442006269592476 [2022-11-23 02:49:11,578 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1003 transitions. [2022-11-23 02:49:11,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1003 transitions. [2022-11-23 02:49:11,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:11,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1003 transitions. [2022-11-23 02:49:11,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 91.18181818181819) internal successors, (1003), 11 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:11,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:11,587 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 290.0) internal successors, (3480), 12 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:11,588 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 125 flow. Second operand 11 states and 1003 transitions. [2022-11-23 02:49:11,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 144 transitions, 857 flow [2022-11-23 02:49:11,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 144 transitions, 779 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-23 02:49:11,599 INFO L231 Difference]: Finished difference. Result has 51 places, 86 transitions, 533 flow [2022-11-23 02:49:11,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=533, PETRI_PLACES=51, PETRI_TRANSITIONS=86} [2022-11-23 02:49:11,601 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 21 predicate places. [2022-11-23 02:49:11,601 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 86 transitions, 533 flow [2022-11-23 02:49:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.06896551724138) internal successors, (2409), 29 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:11,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:11,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:11,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:11,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:11,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:11,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:11,811 INFO L85 PathProgramCache]: Analyzing trace with hash 303762, now seen corresponding path program 2 times [2022-11-23 02:49:11,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:11,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566558626] [2022-11-23 02:49:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:11,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:12,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:12,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566558626] [2022-11-23 02:49:12,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566558626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:12,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354886558] [2022-11-23 02:49:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:49:12,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:12,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:12,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:49:12,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:49:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:12,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 02:49:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:13,244 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:13,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 46 [2022-11-23 02:49:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:13,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:13,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:13,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:49:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:14,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354886558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:14,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:14,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-11-23 02:49:14,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335963126] [2022-11-23 02:49:14,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:14,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:49:14,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:14,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:49:14,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:49:15,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:49:15,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 86 transitions, 533 flow. Second operand has 25 states, 25 states have (on average 107.4) internal successors, (2685), 25 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:15,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:15,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:49:15,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:17,971 INFO L130 PetriNetUnfolder]: 1260/1868 cut-off events. [2022-11-23 02:49:17,971 INFO L131 PetriNetUnfolder]: For 2915/2915 co-relation queries the response was YES. [2022-11-23 02:49:17,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7421 conditions, 1868 events. 1260/1868 cut-off events. For 2915/2915 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7498 event pairs, 117 based on Foata normal form. 3/1870 useless extension candidates. Maximal degree in co-relation 6382. Up to 1210 conditions per place. [2022-11-23 02:49:17,987 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 151 selfloop transitions, 101 changer transitions 15/267 dead transitions. [2022-11-23 02:49:17,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 267 transitions, 2012 flow [2022-11-23 02:49:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 02:49:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 02:49:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2932 transitions. [2022-11-23 02:49:17,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38885941644562333 [2022-11-23 02:49:17,996 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2932 transitions. [2022-11-23 02:49:17,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2932 transitions. [2022-11-23 02:49:17,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:17,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2932 transitions. [2022-11-23 02:49:18,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 112.76923076923077) internal successors, (2932), 26 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:18,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:18,075 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:18,075 INFO L175 Difference]: Start difference. First operand has 51 places, 86 transitions, 533 flow. Second operand 26 states and 2932 transitions. [2022-11-23 02:49:18,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 267 transitions, 2012 flow [2022-11-23 02:49:18,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 267 transitions, 1990 flow, removed 10 selfloop flow, removed 1 redundant places. [2022-11-23 02:49:18,091 INFO L231 Difference]: Finished difference. Result has 86 places, 156 transitions, 1294 flow [2022-11-23 02:49:18,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1294, PETRI_PLACES=86, PETRI_TRANSITIONS=156} [2022-11-23 02:49:18,093 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 56 predicate places. [2022-11-23 02:49:18,094 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 156 transitions, 1294 flow [2022-11-23 02:49:18,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.4) internal successors, (2685), 25 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:18,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:18,095 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:18,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:18,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:18,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:18,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:18,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1176002456, now seen corresponding path program 3 times [2022-11-23 02:49:18,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:18,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209200546] [2022-11-23 02:49:18,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:19,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209200546] [2022-11-23 02:49:19,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209200546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872905375] [2022-11-23 02:49:19,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:49:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:19,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:19,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:49:19,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 02:49:19,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:19,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 02:49:19,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:19,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:19,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-23 02:49:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:20,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:20,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:20,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:49:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:20,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872905375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:20,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:20,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2022-11-23 02:49:20,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538171219] [2022-11-23 02:49:20,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:20,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:49:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:49:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:49:21,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:49:21,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 156 transitions, 1294 flow. Second operand has 27 states, 27 states have (on average 106.25925925925925) internal successors, (2869), 27 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:21,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:21,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:49:21,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:24,152 INFO L130 PetriNetUnfolder]: 1579/2372 cut-off events. [2022-11-23 02:49:24,152 INFO L131 PetriNetUnfolder]: For 7061/7061 co-relation queries the response was YES. [2022-11-23 02:49:24,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11408 conditions, 2372 events. 1579/2372 cut-off events. For 7061/7061 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10312 event pairs, 212 based on Foata normal form. 2/2373 useless extension candidates. Maximal degree in co-relation 11293. Up to 1857 conditions per place. [2022-11-23 02:49:24,174 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 196 selfloop transitions, 126 changer transitions 9/331 dead transitions. [2022-11-23 02:49:24,175 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 331 transitions, 3182 flow [2022-11-23 02:49:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 02:49:24,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-23 02:49:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2889 transitions. [2022-11-23 02:49:24,184 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3831564986737401 [2022-11-23 02:49:24,185 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2889 transitions. [2022-11-23 02:49:24,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2889 transitions. [2022-11-23 02:49:24,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:24,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2889 transitions. [2022-11-23 02:49:24,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 111.11538461538461) internal successors, (2889), 26 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:24,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:24,207 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 290.0) internal successors, (7830), 27 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:24,207 INFO L175 Difference]: Start difference. First operand has 86 places, 156 transitions, 1294 flow. Second operand 26 states and 2889 transitions. [2022-11-23 02:49:24,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 331 transitions, 3182 flow [2022-11-23 02:49:24,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 331 transitions, 3027 flow, removed 50 selfloop flow, removed 4 redundant places. [2022-11-23 02:49:24,248 INFO L231 Difference]: Finished difference. Result has 116 places, 236 transitions, 2227 flow [2022-11-23 02:49:24,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2227, PETRI_PLACES=116, PETRI_TRANSITIONS=236} [2022-11-23 02:49:24,249 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2022-11-23 02:49:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 236 transitions, 2227 flow [2022-11-23 02:49:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.25925925925925) internal successors, (2869), 27 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:24,251 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:24,251 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:24,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:24,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:24,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1106065658, now seen corresponding path program 4 times [2022-11-23 02:49:24,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:24,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234051880] [2022-11-23 02:49:24,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:24,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:25,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:25,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:25,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234051880] [2022-11-23 02:49:25,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234051880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:25,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493023804] [2022-11-23 02:49:25,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:49:25,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:25,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:25,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:25,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:49:25,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:49:25,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:49:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:25,731 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:49:25,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-11-23 02:49:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:25,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:26,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:26,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:49:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:26,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493023804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:26,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:26,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-11-23 02:49:26,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462471933] [2022-11-23 02:49:26,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:49:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:26,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:49:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:49:27,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:49:27,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 236 transitions, 2227 flow. Second operand has 27 states, 27 states have (on average 107.29629629629629) internal successors, (2897), 27 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:27,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:27,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:49:27,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:31,124 INFO L130 PetriNetUnfolder]: 2772/4292 cut-off events. [2022-11-23 02:49:31,124 INFO L131 PetriNetUnfolder]: For 19166/19166 co-relation queries the response was YES. [2022-11-23 02:49:31,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22433 conditions, 4292 events. 2772/4292 cut-off events. For 19166/19166 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22662 event pairs, 145 based on Foata normal form. 4/4296 useless extension candidates. Maximal degree in co-relation 22258. Up to 1781 conditions per place. [2022-11-23 02:49:31,181 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 294 selfloop transitions, 315 changer transitions 26/635 dead transitions. [2022-11-23 02:49:31,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 635 transitions, 6472 flow [2022-11-23 02:49:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 02:49:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-23 02:49:31,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3627 transitions. [2022-11-23 02:49:31,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3908405172413793 [2022-11-23 02:49:31,192 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3627 transitions. [2022-11-23 02:49:31,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3627 transitions. [2022-11-23 02:49:31,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:31,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3627 transitions. [2022-11-23 02:49:31,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 113.34375) internal successors, (3627), 32 states have internal predecessors, (3627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 290.0) internal successors, (9570), 33 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,287 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 290.0) internal successors, (9570), 33 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,287 INFO L175 Difference]: Start difference. First operand has 116 places, 236 transitions, 2227 flow. Second operand 32 states and 3627 transitions. [2022-11-23 02:49:31,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 635 transitions, 6472 flow [2022-11-23 02:49:31,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 635 transitions, 6353 flow, removed 51 selfloop flow, removed 3 redundant places. [2022-11-23 02:49:31,423 INFO L231 Difference]: Finished difference. Result has 160 places, 422 transitions, 4731 flow [2022-11-23 02:49:31,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=2122, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4731, PETRI_PLACES=160, PETRI_TRANSITIONS=422} [2022-11-23 02:49:31,426 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2022-11-23 02:49:31,426 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 422 transitions, 4731 flow [2022-11-23 02:49:31,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.29629629629629) internal successors, (2897), 27 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,428 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:31,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:31,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:31,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:31,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash -711280698, now seen corresponding path program 5 times [2022-11-23 02:49:31,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:31,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348572746] [2022-11-23 02:49:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:31,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:32,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348572746] [2022-11-23 02:49:32,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348572746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:32,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142697061] [2022-11-23 02:49:32,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:49:32,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:32,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:32,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:32,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:49:32,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:49:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:32,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:49:32,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:33,067 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:49:33,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-11-23 02:49:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:33,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:33,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:33,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:49:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:33,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142697061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:33,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:33,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 24 [2022-11-23 02:49:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822571337] [2022-11-23 02:49:33,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:33,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 02:49:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 02:49:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-23 02:49:35,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:49:35,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 422 transitions, 4731 flow. Second operand has 26 states, 26 states have (on average 107.38461538461539) internal successors, (2792), 26 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:35,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:35,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:49:35,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:40,905 INFO L130 PetriNetUnfolder]: 3802/6012 cut-off events. [2022-11-23 02:49:40,906 INFO L131 PetriNetUnfolder]: For 49976/49976 co-relation queries the response was YES. [2022-11-23 02:49:40,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37882 conditions, 6012 events. 3802/6012 cut-off events. For 49976/49976 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34969 event pairs, 239 based on Foata normal form. 8/6020 useless extension candidates. Maximal degree in co-relation 37689. Up to 2267 conditions per place. [2022-11-23 02:49:40,979 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 374 selfloop transitions, 484 changer transitions 39/897 dead transitions. [2022-11-23 02:49:40,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 897 transitions, 10948 flow [2022-11-23 02:49:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 02:49:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-23 02:49:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 5658 transitions. [2022-11-23 02:49:40,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39020689655172414 [2022-11-23 02:49:40,991 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 5658 transitions. [2022-11-23 02:49:40,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 5658 transitions. [2022-11-23 02:49:40,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:40,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 5658 transitions. [2022-11-23 02:49:41,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 113.16) internal successors, (5658), 50 states have internal predecessors, (5658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:41,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 290.0) internal successors, (14790), 51 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:41,025 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 290.0) internal successors, (14790), 51 states have internal predecessors, (14790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:41,025 INFO L175 Difference]: Start difference. First operand has 160 places, 422 transitions, 4731 flow. Second operand 50 states and 5658 transitions. [2022-11-23 02:49:41,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 897 transitions, 10948 flow [2022-11-23 02:49:41,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 897 transitions, 10369 flow, removed 215 selfloop flow, removed 12 redundant places. [2022-11-23 02:49:41,381 INFO L231 Difference]: Finished difference. Result has 220 places, 619 transitions, 8112 flow [2022-11-23 02:49:41,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=8112, PETRI_PLACES=220, PETRI_TRANSITIONS=619} [2022-11-23 02:49:41,424 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2022-11-23 02:49:41,424 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 619 transitions, 8112 flow [2022-11-23 02:49:41,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 107.38461538461539) internal successors, (2792), 26 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:41,425 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:41,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:41,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:41,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:41,626 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:41,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1878330434, now seen corresponding path program 6 times [2022-11-23 02:49:41,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:41,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890860680] [2022-11-23 02:49:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:41,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890860680] [2022-11-23 02:49:42,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890860680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:42,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830471922] [2022-11-23 02:49:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:49:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:42,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:42,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:49:42,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 02:49:42,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 02:49:42,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:43,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:43,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-23 02:49:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:43,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:43,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:43,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-11-23 02:49:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:43,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830471922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:43,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:43,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-23 02:49:43,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676639441] [2022-11-23 02:49:43,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:43,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 02:49:43,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:43,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 02:49:43,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-11-23 02:49:45,403 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 290 [2022-11-23 02:49:45,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 619 transitions, 8112 flow. Second operand has 25 states, 25 states have (on average 107.12) internal successors, (2678), 25 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:45,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:45,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 290 [2022-11-23 02:49:45,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:48,949 INFO L130 PetriNetUnfolder]: 4076/6429 cut-off events. [2022-11-23 02:49:48,949 INFO L131 PetriNetUnfolder]: For 123376/123376 co-relation queries the response was YES. [2022-11-23 02:49:48,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49982 conditions, 6429 events. 4076/6429 cut-off events. For 123376/123376 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 37233 event pairs, 734 based on Foata normal form. 1/6430 useless extension candidates. Maximal degree in co-relation 49727. Up to 5777 conditions per place. [2022-11-23 02:49:49,027 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 535 selfloop transitions, 220 changer transitions 6/761 dead transitions. [2022-11-23 02:49:49,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 761 transitions, 11276 flow [2022-11-23 02:49:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 02:49:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-23 02:49:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2238 transitions. [2022-11-23 02:49:49,031 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3858620689655172 [2022-11-23 02:49:49,031 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2238 transitions. [2022-11-23 02:49:49,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2238 transitions. [2022-11-23 02:49:49,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:49,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2238 transitions. [2022-11-23 02:49:49,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.9) internal successors, (2238), 20 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:49,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 290.0) internal successors, (6090), 21 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:49,045 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 290.0) internal successors, (6090), 21 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:49,045 INFO L175 Difference]: Start difference. First operand has 220 places, 619 transitions, 8112 flow. Second operand 20 states and 2238 transitions. [2022-11-23 02:49:49,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 761 transitions, 11276 flow [2022-11-23 02:49:49,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 761 transitions, 10636 flow, removed 266 selfloop flow, removed 10 redundant places. [2022-11-23 02:49:49,695 INFO L231 Difference]: Finished difference. Result has 239 places, 695 transitions, 9320 flow [2022-11-23 02:49:49,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=7527, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9320, PETRI_PLACES=239, PETRI_TRANSITIONS=695} [2022-11-23 02:49:49,696 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2022-11-23 02:49:49,696 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 695 transitions, 9320 flow [2022-11-23 02:49:49,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 107.12) internal successors, (2678), 25 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:49,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:49,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:49,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:49,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:49:49,898 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -650689016, now seen corresponding path program 7 times [2022-11-23 02:49:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:49,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480238210] [2022-11-23 02:49:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:49,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:50,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480238210] [2022-11-23 02:49:50,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480238210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:50,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518335586] [2022-11-23 02:49:50,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:49:50,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:50,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:50,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:49:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:50,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:49:50,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:51,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:51,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 81 [2022-11-23 02:49:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:51,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:51,800 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:51,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-11-23 02:49:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518335586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:52,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:52,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 21 [2022-11-23 02:49:52,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801502335] [2022-11-23 02:49:52,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:52,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 02:49:52,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:52,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 02:49:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-11-23 02:49:53,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 290 [2022-11-23 02:49:53,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 695 transitions, 9320 flow. Second operand has 23 states, 23 states have (on average 111.47826086956522) internal successors, (2564), 23 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:53,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:53,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 290 [2022-11-23 02:49:53,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:56,732 INFO L130 PetriNetUnfolder]: 4280/6839 cut-off events. [2022-11-23 02:49:56,732 INFO L131 PetriNetUnfolder]: For 157924/158152 co-relation queries the response was YES. [2022-11-23 02:49:56,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 6839 events. 4280/6839 cut-off events. For 157924/158152 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 41901 event pairs, 518 based on Foata normal form. 130/6928 useless extension candidates. Maximal degree in co-relation 55228. Up to 5080 conditions per place. [2022-11-23 02:49:56,834 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 560 selfloop transitions, 243 changer transitions 4/829 dead transitions. [2022-11-23 02:49:56,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 829 transitions, 12767 flow [2022-11-23 02:49:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:49:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 02:49:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1856 transitions. [2022-11-23 02:49:56,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-11-23 02:49:56,838 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1856 transitions. [2022-11-23 02:49:56,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1856 transitions. [2022-11-23 02:49:56,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:56,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1856 transitions. [2022-11-23 02:49:56,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,849 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 290.0) internal successors, (4930), 17 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,849 INFO L175 Difference]: Start difference. First operand has 239 places, 695 transitions, 9320 flow. Second operand 16 states and 1856 transitions. [2022-11-23 02:49:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 829 transitions, 12767 flow [2022-11-23 02:49:57,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 829 transitions, 12160 flow, removed 288 selfloop flow, removed 4 redundant places. [2022-11-23 02:49:57,624 INFO L231 Difference]: Finished difference. Result has 255 places, 768 transitions, 10633 flow [2022-11-23 02:49:57,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10633, PETRI_PLACES=255, PETRI_TRANSITIONS=768} [2022-11-23 02:49:57,625 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 225 predicate places. [2022-11-23 02:49:57,625 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 768 transitions, 10633 flow [2022-11-23 02:49:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 111.47826086956522) internal successors, (2564), 23 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:57,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:57,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:57,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:57,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:49:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash 494075922, now seen corresponding path program 8 times [2022-11-23 02:49:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:49:57,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436547814] [2022-11-23 02:49:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:49:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:49:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436547814] [2022-11-23 02:49:58,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436547814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:49:58,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987553098] [2022-11-23 02:49:58,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:49:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:49:58,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:49:58,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:49:58,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:49:58,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:49:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:58,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 02:49:58,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:59,247 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 55 treesize of output 31 [2022-11-23 02:49:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:59,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:59,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:49:59,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:49:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:49:59,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987553098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:59,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:49:59,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2022-11-23 02:49:59,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903122735] [2022-11-23 02:49:59,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:59,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:49:59,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:49:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:49:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:50:01,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:50:01,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 768 transitions, 10633 flow. Second operand has 27 states, 27 states have (on average 106.07407407407408) internal successors, (2864), 27 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:01,293 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:01,293 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:50:01,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:04,074 INFO L130 PetriNetUnfolder]: 4425/7043 cut-off events. [2022-11-23 02:50:04,074 INFO L131 PetriNetUnfolder]: For 141947/141947 co-relation queries the response was YES. [2022-11-23 02:50:04,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56459 conditions, 7043 events. 4425/7043 cut-off events. For 141947/141947 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42181 event pairs, 847 based on Foata normal form. 1/7044 useless extension candidates. Maximal degree in co-relation 56206. Up to 6698 conditions per place. [2022-11-23 02:50:04,158 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 655 selfloop transitions, 148 changer transitions 6/809 dead transitions. [2022-11-23 02:50:04,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 809 transitions, 12640 flow [2022-11-23 02:50:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 02:50:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-23 02:50:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1433 transitions. [2022-11-23 02:50:04,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38010610079575596 [2022-11-23 02:50:04,162 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1433 transitions. [2022-11-23 02:50:04,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1433 transitions. [2022-11-23 02:50:04,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:04,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1433 transitions. [2022-11-23 02:50:04,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.23076923076923) internal successors, (1433), 13 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:04,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:04,169 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 290.0) internal successors, (4060), 14 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:04,169 INFO L175 Difference]: Start difference. First operand has 255 places, 768 transitions, 10633 flow. Second operand 13 states and 1433 transitions. [2022-11-23 02:50:04,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 809 transitions, 12640 flow [2022-11-23 02:50:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 809 transitions, 12304 flow, removed 111 selfloop flow, removed 6 redundant places. [2022-11-23 02:50:05,035 INFO L231 Difference]: Finished difference. Result has 264 places, 774 transitions, 10721 flow [2022-11-23 02:50:05,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=10319, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10721, PETRI_PLACES=264, PETRI_TRANSITIONS=774} [2022-11-23 02:50:05,036 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2022-11-23 02:50:05,036 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 774 transitions, 10721 flow [2022-11-23 02:50:05,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.07407407407408) internal successors, (2864), 27 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:05,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:05,038 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:05,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:05,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:05,244 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:05,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:05,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1842722386, now seen corresponding path program 9 times [2022-11-23 02:50:05,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:05,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070443722] [2022-11-23 02:50:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:05,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:06,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070443722] [2022-11-23 02:50:06,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070443722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:06,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53877362] [2022-11-23 02:50:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:50:06,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:06,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:06,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:50:06,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:50:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 02:50:06,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:06,852 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 55 treesize of output 31 [2022-11-23 02:50:06,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:06,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:07,105 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:50:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:50:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:07,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53877362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:07,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:07,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-11-23 02:50:07,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303925755] [2022-11-23 02:50:07,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:07,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 02:50:07,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:07,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 02:50:07,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-11-23 02:50:09,035 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:50:09,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 774 transitions, 10721 flow. Second operand has 29 states, 29 states have (on average 106.10344827586206) internal successors, (3077), 29 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:09,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:09,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:50:09,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:12,824 INFO L130 PetriNetUnfolder]: 4547/7244 cut-off events. [2022-11-23 02:50:12,824 INFO L131 PetriNetUnfolder]: For 138514/138514 co-relation queries the response was YES. [2022-11-23 02:50:12,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57617 conditions, 7244 events. 4547/7244 cut-off events. For 138514/138514 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 43730 event pairs, 933 based on Foata normal form. 1/7245 useless extension candidates. Maximal degree in co-relation 57360. Up to 6853 conditions per place. [2022-11-23 02:50:12,898 INFO L137 encePairwiseOnDemand]: 278/290 looper letters, 703 selfloop transitions, 171 changer transitions 1/875 dead transitions. [2022-11-23 02:50:12,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 875 transitions, 13792 flow [2022-11-23 02:50:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 02:50:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-23 02:50:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2747 transitions. [2022-11-23 02:50:12,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37889655172413794 [2022-11-23 02:50:12,903 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2747 transitions. [2022-11-23 02:50:12,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2747 transitions. [2022-11-23 02:50:12,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:12,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2747 transitions. [2022-11-23 02:50:12,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 109.88) internal successors, (2747), 25 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:12,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:13,064 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 290.0) internal successors, (7540), 26 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:13,064 INFO L175 Difference]: Start difference. First operand has 264 places, 774 transitions, 10721 flow. Second operand 25 states and 2747 transitions. [2022-11-23 02:50:13,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 875 transitions, 13792 flow [2022-11-23 02:50:13,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 875 transitions, 13432 flow, removed 20 selfloop flow, removed 9 redundant places. [2022-11-23 02:50:13,694 INFO L231 Difference]: Finished difference. Result has 287 places, 824 transitions, 11677 flow [2022-11-23 02:50:13,694 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=10402, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=11677, PETRI_PLACES=287, PETRI_TRANSITIONS=824} [2022-11-23 02:50:13,695 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2022-11-23 02:50:13,695 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 824 transitions, 11677 flow [2022-11-23 02:50:13,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 106.10344827586206) internal successors, (3077), 29 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:13,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:13,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:13,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 02:50:13,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:13,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1064400656, now seen corresponding path program 10 times [2022-11-23 02:50:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554871783] [2022-11-23 02:50:13,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:14,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554871783] [2022-11-23 02:50:14,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554871783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:14,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643457980] [2022-11-23 02:50:14,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:50:14,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:14,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:14,588 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:14,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 02:50:14,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:50:14,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:14,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 02:50:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:15,182 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:50:15,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 69 [2022-11-23 02:50:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:15,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:15,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:50:15,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-11-23 02:50:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:15,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643457980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:15,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:15,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 25 [2022-11-23 02:50:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552247660] [2022-11-23 02:50:15,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-23 02:50:15,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-23 02:50:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-23 02:50:17,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 290 [2022-11-23 02:50:17,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 824 transitions, 11677 flow. Second operand has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:17,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:17,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 290 [2022-11-23 02:50:17,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:21,677 INFO L130 PetriNetUnfolder]: 4827/7683 cut-off events. [2022-11-23 02:50:21,677 INFO L131 PetriNetUnfolder]: For 157471/157471 co-relation queries the response was YES. [2022-11-23 02:50:21,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62534 conditions, 7683 events. 4827/7683 cut-off events. For 157471/157471 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46989 event pairs, 355 based on Foata normal form. 3/7686 useless extension candidates. Maximal degree in co-relation 62268. Up to 4655 conditions per place. [2022-11-23 02:50:21,769 INFO L137 encePairwiseOnDemand]: 275/290 looper letters, 503 selfloop transitions, 451 changer transitions 6/960 dead transitions. [2022-11-23 02:50:21,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 960 transitions, 15350 flow [2022-11-23 02:50:21,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 02:50:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 02:50:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2355 transitions. [2022-11-23 02:50:21,775 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3866995073891626 [2022-11-23 02:50:21,775 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2355 transitions. [2022-11-23 02:50:21,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2355 transitions. [2022-11-23 02:50:21,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:21,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2355 transitions. [2022-11-23 02:50:21,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 112.14285714285714) internal successors, (2355), 21 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:21,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 290.0) internal successors, (6380), 22 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:21,786 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 290.0) internal successors, (6380), 22 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:21,786 INFO L175 Difference]: Start difference. First operand has 287 places, 824 transitions, 11677 flow. Second operand 21 states and 2355 transitions. [2022-11-23 02:50:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 960 transitions, 15350 flow [2022-11-23 02:50:22,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 960 transitions, 14972 flow, removed 109 selfloop flow, removed 6 redundant places. [2022-11-23 02:50:22,696 INFO L231 Difference]: Finished difference. Result has 306 places, 865 transitions, 13039 flow [2022-11-23 02:50:22,697 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11301, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13039, PETRI_PLACES=306, PETRI_TRANSITIONS=865} [2022-11-23 02:50:22,697 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2022-11-23 02:50:22,697 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 865 transitions, 13039 flow [2022-11-23 02:50:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 106.29629629629629) internal successors, (2870), 27 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:22,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:22,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:22,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:22,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 02:50:22,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1557618042, now seen corresponding path program 11 times [2022-11-23 02:50:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:22,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14693173] [2022-11-23 02:50:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:23,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:23,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14693173] [2022-11-23 02:50:23,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14693173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:23,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701534917] [2022-11-23 02:50:23,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:50:23,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:23,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:23,665 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:23,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 02:50:23,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:50:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:50:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:24,326 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 55 treesize of output 31 [2022-11-23 02:50:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:24,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:50:24,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-11-23 02:50:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:24,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701534917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:24,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:24,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-11-23 02:50:24,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864099248] [2022-11-23 02:50:24,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:24,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:50:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:50:24,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:50:26,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2022-11-23 02:50:26,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 865 transitions, 13039 flow. Second operand has 24 states, 24 states have (on average 108.54166666666667) internal successors, (2605), 24 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:26,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:26,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2022-11-23 02:50:26,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:31,726 INFO L130 PetriNetUnfolder]: 4854/7755 cut-off events. [2022-11-23 02:50:31,726 INFO L131 PetriNetUnfolder]: For 180368/180368 co-relation queries the response was YES. [2022-11-23 02:50:31,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65961 conditions, 7755 events. 4854/7755 cut-off events. For 180368/180368 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 48214 event pairs, 388 based on Foata normal form. 32/7787 useless extension candidates. Maximal degree in co-relation 65726. Up to 5183 conditions per place. [2022-11-23 02:50:31,861 INFO L137 encePairwiseOnDemand]: 276/290 looper letters, 538 selfloop transitions, 463 changer transitions 10/1011 dead transitions. [2022-11-23 02:50:31,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1011 transitions, 16861 flow [2022-11-23 02:50:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 02:50:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-23 02:50:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3621 transitions. [2022-11-23 02:50:31,869 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3901939655172414 [2022-11-23 02:50:31,870 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3621 transitions. [2022-11-23 02:50:31,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3621 transitions. [2022-11-23 02:50:31,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:31,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3621 transitions. [2022-11-23 02:50:31,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 113.15625) internal successors, (3621), 32 states have internal predecessors, (3621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:31,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 290.0) internal successors, (9570), 33 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:31,892 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 290.0) internal successors, (9570), 33 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:31,892 INFO L175 Difference]: Start difference. First operand has 306 places, 865 transitions, 13039 flow. Second operand 32 states and 3621 transitions. [2022-11-23 02:50:31,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1011 transitions, 16861 flow [2022-11-23 02:50:32,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1011 transitions, 16254 flow, removed 213 selfloop flow, removed 6 redundant places. [2022-11-23 02:50:32,832 INFO L231 Difference]: Finished difference. Result has 332 places, 859 transitions, 13462 flow [2022-11-23 02:50:32,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=11925, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=13462, PETRI_PLACES=332, PETRI_TRANSITIONS=859} [2022-11-23 02:50:32,834 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2022-11-23 02:50:32,834 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 859 transitions, 13462 flow [2022-11-23 02:50:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 108.54166666666667) internal successors, (2605), 24 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:32,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:32,835 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:32,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 02:50:33,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 02:50:33,102 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash 561238468, now seen corresponding path program 12 times [2022-11-23 02:50:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:33,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521685697] [2022-11-23 02:50:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:33,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521685697] [2022-11-23 02:50:33,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521685697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:33,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212554343] [2022-11-23 02:50:33,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-23 02:50:33,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:33,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:33,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:33,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 02:50:33,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-23 02:50:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:33,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 02:50:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:34,366 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 55 treesize of output 31 [2022-11-23 02:50:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:34,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:34,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:50:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2022-11-23 02:50:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:34,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212554343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:34,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:34,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-11-23 02:50:34,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925693968] [2022-11-23 02:50:34,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:34,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:50:34,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:50:34,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:50:36,249 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 290 [2022-11-23 02:50:36,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 859 transitions, 13462 flow. Second operand has 24 states, 24 states have (on average 108.54166666666667) internal successors, (2605), 24 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:36,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:36,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 290 [2022-11-23 02:50:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:40,867 INFO L130 PetriNetUnfolder]: 4986/7968 cut-off events. [2022-11-23 02:50:40,867 INFO L131 PetriNetUnfolder]: For 187669/187669 co-relation queries the response was YES. [2022-11-23 02:50:40,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69046 conditions, 7968 events. 4986/7968 cut-off events. For 187669/187669 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 49829 event pairs, 453 based on Foata normal form. 2/7970 useless extension candidates. Maximal degree in co-relation 68756. Up to 5437 conditions per place. [2022-11-23 02:50:40,967 INFO L137 encePairwiseOnDemand]: 277/290 looper letters, 575 selfloop transitions, 458 changer transitions 11/1044 dead transitions. [2022-11-23 02:50:40,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1044 transitions, 18012 flow [2022-11-23 02:50:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 02:50:40,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-23 02:50:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3399 transitions. [2022-11-23 02:50:40,973 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3906896551724138 [2022-11-23 02:50:40,974 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3399 transitions. [2022-11-23 02:50:40,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3399 transitions. [2022-11-23 02:50:40,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:40,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3399 transitions. [2022-11-23 02:50:40,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 113.3) internal successors, (3399), 30 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:40,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:40,989 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 290.0) internal successors, (8990), 31 states have internal predecessors, (8990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:40,989 INFO L175 Difference]: Start difference. First operand has 332 places, 859 transitions, 13462 flow. Second operand 30 states and 3399 transitions. [2022-11-23 02:50:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1044 transitions, 18012 flow [2022-11-23 02:50:41,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1044 transitions, 17593 flow, removed 88 selfloop flow, removed 13 redundant places. [2022-11-23 02:50:41,881 INFO L231 Difference]: Finished difference. Result has 355 places, 924 transitions, 15389 flow [2022-11-23 02:50:41,882 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=13072, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15389, PETRI_PLACES=355, PETRI_TRANSITIONS=924} [2022-11-23 02:50:41,882 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 325 predicate places. [2022-11-23 02:50:41,882 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 924 transitions, 15389 flow [2022-11-23 02:50:41,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 108.54166666666667) internal successors, (2605), 24 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:41,883 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:41,883 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:41,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-23 02:50:42,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 02:50:42,083 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:42,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:42,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1594125632, now seen corresponding path program 13 times [2022-11-23 02:50:42,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:42,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016896668] [2022-11-23 02:50:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:42,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016896668] [2022-11-23 02:50:42,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016896668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:42,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989971827] [2022-11-23 02:50:42,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 02:50:42,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:42,872 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:42,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 02:50:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 02:50:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:43,331 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-23 02:50:43,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2022-11-23 02:50:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:43,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:43,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 02:50:43,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 51 [2022-11-23 02:50:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:43,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989971827] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:43,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:43,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2022-11-23 02:50:43,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471658568] [2022-11-23 02:50:43,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:43,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:50:43,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:50:43,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:50:45,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 290 [2022-11-23 02:50:45,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 924 transitions, 15389 flow. Second operand has 24 states, 24 states have (on average 111.66666666666667) internal successors, (2680), 24 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:45,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:45,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 290 [2022-11-23 02:50:45,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:48,919 INFO L130 PetriNetUnfolder]: 4942/7940 cut-off events. [2022-11-23 02:50:48,919 INFO L131 PetriNetUnfolder]: For 209440/209672 co-relation queries the response was YES. [2022-11-23 02:50:48,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72263 conditions, 7940 events. 4942/7940 cut-off events. For 209440/209672 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50116 event pairs, 1017 based on Foata normal form. 111/7987 useless extension candidates. Maximal degree in co-relation 71975. Up to 7198 conditions per place. [2022-11-23 02:50:49,029 INFO L137 encePairwiseOnDemand]: 281/290 looper letters, 790 selfloop transitions, 188 changer transitions 1/1002 dead transitions. [2022-11-23 02:50:49,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1002 transitions, 18564 flow [2022-11-23 02:50:49,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 02:50:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-23 02:50:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1170 transitions. [2022-11-23 02:50:49,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40344827586206894 [2022-11-23 02:50:49,034 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1170 transitions. [2022-11-23 02:50:49,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1170 transitions. [2022-11-23 02:50:49,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:49,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1170 transitions. [2022-11-23 02:50:49,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.0) internal successors, (1170), 10 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:49,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:49,039 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 290.0) internal successors, (3190), 11 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:49,040 INFO L175 Difference]: Start difference. First operand has 355 places, 924 transitions, 15389 flow. Second operand 10 states and 1170 transitions. [2022-11-23 02:50:49,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1002 transitions, 18564 flow [2022-11-23 02:50:50,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1002 transitions, 17935 flow, removed 195 selfloop flow, removed 16 redundant places. [2022-11-23 02:50:50,355 INFO L231 Difference]: Finished difference. Result has 350 places, 958 transitions, 16051 flow [2022-11-23 02:50:50,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=14804, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=736, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16051, PETRI_PLACES=350, PETRI_TRANSITIONS=958} [2022-11-23 02:50:50,356 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2022-11-23 02:50:50,356 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 958 transitions, 16051 flow [2022-11-23 02:50:50,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 111.66666666666667) internal successors, (2680), 24 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:50,357 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:50,357 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:50,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 02:50:50,563 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 480002326, now seen corresponding path program 14 times [2022-11-23 02:50:50,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:50,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459072047] [2022-11-23 02:50:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:50,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:50,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459072047] [2022-11-23 02:50:50,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459072047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:50,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379004820] [2022-11-23 02:50:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:50:50,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:50,700 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:50,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 02:50:50,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:50:50,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 02:50:50,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:50,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:51,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379004820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:51,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:51,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-11-23 02:50:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745123135] [2022-11-23 02:50:51,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:51,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:50:51,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:50:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:50:51,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 290 [2022-11-23 02:50:51,266 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 958 transitions, 16051 flow. Second operand has 15 states, 15 states have (on average 125.93333333333334) internal successors, (1889), 15 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:51,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:51,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 290 [2022-11-23 02:50:51,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:54,596 INFO L130 PetriNetUnfolder]: 5691/9098 cut-off events. [2022-11-23 02:50:54,596 INFO L131 PetriNetUnfolder]: For 252673/253671 co-relation queries the response was YES. [2022-11-23 02:50:54,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83227 conditions, 9098 events. 5691/9098 cut-off events. For 252673/253671 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 58503 event pairs, 1649 based on Foata normal form. 465/9369 useless extension candidates. Maximal degree in co-relation 83032. Up to 5665 conditions per place. [2022-11-23 02:50:54,766 INFO L137 encePairwiseOnDemand]: 285/290 looper letters, 991 selfloop transitions, 109 changer transitions 4/1162 dead transitions. [2022-11-23 02:50:54,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1162 transitions, 21475 flow [2022-11-23 02:50:54,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:50:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-23 02:50:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 926 transitions. [2022-11-23 02:50:54,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45615763546798027 [2022-11-23 02:50:54,769 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 926 transitions. [2022-11-23 02:50:54,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 926 transitions. [2022-11-23 02:50:54,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:54,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 926 transitions. [2022-11-23 02:50:54,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.28571428571428) internal successors, (926), 7 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:54,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:54,773 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 290.0) internal successors, (2320), 8 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:54,774 INFO L175 Difference]: Start difference. First operand has 350 places, 958 transitions, 16051 flow. Second operand 7 states and 926 transitions. [2022-11-23 02:50:54,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1162 transitions, 21475 flow [2022-11-23 02:50:55,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1162 transitions, 21143 flow, removed 52 selfloop flow, removed 8 redundant places. [2022-11-23 02:50:55,957 INFO L231 Difference]: Finished difference. Result has 348 places, 946 transitions, 16071 flow [2022-11-23 02:50:55,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=15176, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16071, PETRI_PLACES=348, PETRI_TRANSITIONS=946} [2022-11-23 02:50:55,958 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 318 predicate places. [2022-11-23 02:50:55,959 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 946 transitions, 16071 flow [2022-11-23 02:50:55,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 125.93333333333334) internal successors, (1889), 15 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:55,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:55,959 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:50:55,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:56,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 02:50:56,166 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:50:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:56,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1491872133, now seen corresponding path program 15 times [2022-11-23 02:50:56,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:50:56,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970731950] [2022-11-23 02:50:56,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:50:56,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:50:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:50:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:56,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:50:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970731950] [2022-11-23 02:50:56,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970731950] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:50:56,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900337378] [2022-11-23 02:50:56,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:50:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:50:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:50:56,360 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:50:56,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 02:50:56,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:50:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:50:56,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:56,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:56,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:56,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900337378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:56,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:50:56,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-11-23 02:50:56,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741978421] [2022-11-23 02:50:56,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:56,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 02:50:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:50:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 02:50:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-23 02:50:57,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 290 [2022-11-23 02:50:57,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 946 transitions, 16071 flow. Second operand has 15 states, 15 states have (on average 124.26666666666667) internal successors, (1864), 15 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:57,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:57,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 290 [2022-11-23 02:50:57,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:51:00,572 INFO L130 PetriNetUnfolder]: 5142/8560 cut-off events. [2022-11-23 02:51:00,572 INFO L131 PetriNetUnfolder]: For 238290/238842 co-relation queries the response was YES. [2022-11-23 02:51:00,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78882 conditions, 8560 events. 5142/8560 cut-off events. For 238290/238842 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58420 event pairs, 944 based on Foata normal form. 623/9113 useless extension candidates. Maximal degree in co-relation 78674. Up to 3395 conditions per place. [2022-11-23 02:51:00,714 INFO L137 encePairwiseOnDemand]: 284/290 looper letters, 845 selfloop transitions, 162 changer transitions 29/1081 dead transitions. [2022-11-23 02:51:00,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 1081 transitions, 20403 flow [2022-11-23 02:51:00,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 02:51:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 02:51:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1040 transitions. [2022-11-23 02:51:00,718 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4482758620689655 [2022-11-23 02:51:00,718 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1040 transitions. [2022-11-23 02:51:00,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1040 transitions. [2022-11-23 02:51:00,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:00,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1040 transitions. [2022-11-23 02:51:00,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:00,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:00,722 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 290.0) internal successors, (2610), 9 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:00,722 INFO L175 Difference]: Start difference. First operand has 348 places, 946 transitions, 16071 flow. Second operand 8 states and 1040 transitions. [2022-11-23 02:51:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 1081 transitions, 20403 flow [2022-11-23 02:51:02,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1081 transitions, 20244 flow, removed 77 selfloop flow, removed 3 redundant places. [2022-11-23 02:51:02,067 INFO L231 Difference]: Finished difference. Result has 356 places, 892 transitions, 15928 flow [2022-11-23 02:51:02,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=15141, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15928, PETRI_PLACES=356, PETRI_TRANSITIONS=892} [2022-11-23 02:51:02,069 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2022-11-23 02:51:02,069 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 892 transitions, 15928 flow [2022-11-23 02:51:02,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.26666666666667) internal successors, (1864), 15 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:02,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:02,070 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:02,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:02,271 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:51:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:02,271 INFO L85 PathProgramCache]: Analyzing trace with hash 861988993, now seen corresponding path program 1 times [2022-11-23 02:51:02,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:02,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577768794] [2022-11-23 02:51:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:02,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577768794] [2022-11-23 02:51:02,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577768794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:51:02,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590433429] [2022-11-23 02:51:02,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:02,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:02,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:02,404 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:02,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 02:51:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:51:02,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:02,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:02,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590433429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:02,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:51:02,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 02:51:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390801060] [2022-11-23 02:51:02,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:02,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:51:02,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:51:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:51:03,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:51:03,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 892 transitions, 15928 flow. Second operand has 16 states, 16 states have (on average 119.6875) internal successors, (1915), 16 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:03,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:03,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:51:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:51:06,758 INFO L130 PetriNetUnfolder]: 5277/8799 cut-off events. [2022-11-23 02:51:06,758 INFO L131 PetriNetUnfolder]: For 247966/247992 co-relation queries the response was YES. [2022-11-23 02:51:06,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82844 conditions, 8799 events. 5277/8799 cut-off events. For 247966/247992 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 59767 event pairs, 686 based on Foata normal form. 32/8818 useless extension candidates. Maximal degree in co-relation 82635. Up to 3197 conditions per place. [2022-11-23 02:51:06,891 INFO L137 encePairwiseOnDemand]: 282/290 looper letters, 905 selfloop transitions, 223 changer transitions 28/1178 dead transitions. [2022-11-23 02:51:06,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1178 transitions, 22688 flow [2022-11-23 02:51:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:51:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:51:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1520 transitions. [2022-11-23 02:51:06,895 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2022-11-23 02:51:06,896 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1520 transitions. [2022-11-23 02:51:06,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1520 transitions. [2022-11-23 02:51:06,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:06,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1520 transitions. [2022-11-23 02:51:06,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.66666666666667) internal successors, (1520), 12 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:06,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:06,905 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 290.0) internal successors, (3770), 13 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:06,905 INFO L175 Difference]: Start difference. First operand has 356 places, 892 transitions, 15928 flow. Second operand 12 states and 1520 transitions. [2022-11-23 02:51:06,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1178 transitions, 22688 flow [2022-11-23 02:51:08,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1178 transitions, 22442 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-23 02:51:08,696 INFO L231 Difference]: Finished difference. Result has 369 places, 926 transitions, 17265 flow [2022-11-23 02:51:08,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=15762, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=17265, PETRI_PLACES=369, PETRI_TRANSITIONS=926} [2022-11-23 02:51:08,697 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 339 predicate places. [2022-11-23 02:51:08,697 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 926 transitions, 17265 flow [2022-11-23 02:51:08,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 119.6875) internal successors, (1915), 16 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:08,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:08,697 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:08,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-23 02:51:08,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:08,898 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:51:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 601233963, now seen corresponding path program 2 times [2022-11-23 02:51:08,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117296733] [2022-11-23 02:51:08,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:08,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:09,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:09,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117296733] [2022-11-23 02:51:09,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117296733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:51:09,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878504346] [2022-11-23 02:51:09,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:51:09,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:09,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:09,142 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:09,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 02:51:09,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:51:09,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:51:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:09,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:09,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878504346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:09,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:51:09,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-23 02:51:09,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903342085] [2022-11-23 02:51:09,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 02:51:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 02:51:09,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-23 02:51:09,824 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:51:09,825 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 926 transitions, 17265 flow. Second operand has 17 states, 17 states have (on average 119.17647058823529) internal successors, (2026), 17 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:09,826 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:09,826 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:51:09,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:51:14,645 INFO L130 PetriNetUnfolder]: 6190/10666 cut-off events. [2022-11-23 02:51:14,645 INFO L131 PetriNetUnfolder]: For 344972/345018 co-relation queries the response was YES. [2022-11-23 02:51:14,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103271 conditions, 10666 events. 6190/10666 cut-off events. For 344972/345018 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 79153 event pairs, 411 based on Foata normal form. 70/10723 useless extension candidates. Maximal degree in co-relation 103053. Up to 3900 conditions per place. [2022-11-23 02:51:14,846 INFO L137 encePairwiseOnDemand]: 280/290 looper letters, 1064 selfloop transitions, 361 changer transitions 42/1489 dead transitions. [2022-11-23 02:51:14,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1489 transitions, 29278 flow [2022-11-23 02:51:14,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 02:51:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-23 02:51:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2290 transitions. [2022-11-23 02:51:14,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4386973180076628 [2022-11-23 02:51:14,850 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2290 transitions. [2022-11-23 02:51:14,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2290 transitions. [2022-11-23 02:51:14,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:14,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2290 transitions. [2022-11-23 02:51:14,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 127.22222222222223) internal successors, (2290), 18 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:14,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:14,859 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 290.0) internal successors, (5510), 19 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:14,859 INFO L175 Difference]: Start difference. First operand has 369 places, 926 transitions, 17265 flow. Second operand 18 states and 2290 transitions. [2022-11-23 02:51:14,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1489 transitions, 29278 flow [2022-11-23 02:51:17,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1489 transitions, 29145 flow, removed 45 selfloop flow, removed 5 redundant places. [2022-11-23 02:51:17,432 INFO L231 Difference]: Finished difference. Result has 388 places, 1024 transitions, 20464 flow [2022-11-23 02:51:17,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=17164, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20464, PETRI_PLACES=388, PETRI_TRANSITIONS=1024} [2022-11-23 02:51:17,433 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2022-11-23 02:51:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1024 transitions, 20464 flow [2022-11-23 02:51:17,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 119.17647058823529) internal successors, (2026), 17 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:17,434 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:17,434 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:17,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:17,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:51:17,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -368450097, now seen corresponding path program 3 times [2022-11-23 02:51:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:17,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819826783] [2022-11-23 02:51:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:17,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819826783] [2022-11-23 02:51:17,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819826783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:51:17,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585549796] [2022-11-23 02:51:17,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:51:17,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:17,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:17,792 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:17,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 02:51:17,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:51:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:51:17,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:18,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585549796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:18,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:51:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-23 02:51:18,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032627944] [2022-11-23 02:51:18,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:18,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 02:51:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 02:51:18,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:51:18,575 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 290 [2022-11-23 02:51:18,577 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1024 transitions, 20464 flow. Second operand has 18 states, 18 states have (on average 119.05555555555556) internal successors, (2143), 18 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:18,577 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:18,577 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 290 [2022-11-23 02:51:18,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:51:23,681 INFO L130 PetriNetUnfolder]: 5929/10348 cut-off events. [2022-11-23 02:51:23,682 INFO L131 PetriNetUnfolder]: For 398698/398767 co-relation queries the response was YES. [2022-11-23 02:51:23,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105123 conditions, 10348 events. 5929/10348 cut-off events. For 398698/398767 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 77413 event pairs, 564 based on Foata normal form. 304/10641 useless extension candidates. Maximal degree in co-relation 104897. Up to 3946 conditions per place. [2022-11-23 02:51:23,863 INFO L137 encePairwiseOnDemand]: 281/290 looper letters, 1072 selfloop transitions, 292 changer transitions 31/1417 dead transitions. [2022-11-23 02:51:23,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1417 transitions, 29279 flow [2022-11-23 02:51:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 02:51:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-23 02:51:23,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2142 transitions. [2022-11-23 02:51:23,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43448275862068964 [2022-11-23 02:51:23,867 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2142 transitions. [2022-11-23 02:51:23,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2142 transitions. [2022-11-23 02:51:23,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:23,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2142 transitions. [2022-11-23 02:51:23,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 126.0) internal successors, (2142), 17 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:23,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:23,877 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 290.0) internal successors, (5220), 18 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:23,877 INFO L175 Difference]: Start difference. First operand has 388 places, 1024 transitions, 20464 flow. Second operand 17 states and 2142 transitions. [2022-11-23 02:51:23,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1417 transitions, 29279 flow [2022-11-23 02:51:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1417 transitions, 28458 flow, removed 218 selfloop flow, removed 11 redundant places. [2022-11-23 02:51:27,982 INFO L231 Difference]: Finished difference. Result has 395 places, 982 transitions, 19598 flow [2022-11-23 02:51:27,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=290, PETRI_DIFFERENCE_MINUEND_FLOW=17712, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19598, PETRI_PLACES=395, PETRI_TRANSITIONS=982} [2022-11-23 02:51:27,983 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 365 predicate places. [2022-11-23 02:51:27,983 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 982 transitions, 19598 flow [2022-11-23 02:51:27,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 119.05555555555556) internal successors, (2143), 18 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:27,983 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:27,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:27,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:28,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 02:51:28,184 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-23 02:51:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:28,185 INFO L85 PathProgramCache]: Analyzing trace with hash -295737103, now seen corresponding path program 4 times [2022-11-23 02:51:28,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:51:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083697177] [2022-11-23 02:51:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:51:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:51:28,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:51:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:51:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083697177] [2022-11-23 02:51:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083697177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 02:51:28,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340969230] [2022-11-23 02:51:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:51:28,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:51:28,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:51:28,338 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:51:28,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53e6097d-25d9-4952-8e24-0196dc710cae/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 02:51:28,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:51:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:28,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:51:28,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:28,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:51:28,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340969230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:28,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 02:51:28,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-11-23 02:51:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295784158] [2022-11-23 02:51:28,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:28,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:51:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:51:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:51:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:51:28,848 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 290 [2022-11-23 02:51:28,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 982 transitions, 19598 flow. Second operand has 14 states, 14 states have (on average 117.21428571428571) internal successors, (1641), 14 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:28,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:28,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 290 [2022-11-23 02:51:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand