./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa --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 c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:59:48,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:59:48,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:59:48,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:59:48,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:59:48,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:59:48,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:59:48,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:59:48,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:59:48,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:59:48,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:59:48,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:59:48,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:59:48,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:59:48,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:59:48,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:59:48,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:59:48,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:59:48,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:59:48,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:59:48,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:59:48,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:59:48,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:59:48,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:59:48,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:59:48,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:59:48,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:59:48,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:59:48,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:59:48,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:59:48,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:59:48,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:59:48,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:59:48,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:59:48,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:59:48,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:59:48,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:59:48,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:59:48,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:59:48,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:59:48,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:59:48,786 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:59:48,803 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:59:48,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:59:48,804 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:59:48,804 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:59:48,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:59:48,805 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:59:48,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:59:48,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:59:48,805 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:59:48,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:59:48,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:59:48,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:59:48,807 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:59:48,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:59:48,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:59:48,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:59:48,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c80601716e9c0111d78d12f0a88108c91b0aa7215f8e775685e33490f22c8502 [2021-12-06 22:59:49,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:59:49,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:59:49,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:59:49,036 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:59:49,036 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:59:49,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-12-06 22:59:49,083 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/data/f81916bd7/2429b7f67fff445e8d9dabed2b959bf1/FLAGc787350c0 [2021-12-06 22:59:49,456 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:59:49,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c [2021-12-06 22:59:49,462 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/data/f81916bd7/2429b7f67fff445e8d9dabed2b959bf1/FLAGc787350c0 [2021-12-06 22:59:49,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/data/f81916bd7/2429b7f67fff445e8d9dabed2b959bf1 [2021-12-06 22:59:49,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:59:49,475 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:59:49,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:59:49,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:59:49,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:59:49,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,481 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cea6fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49, skipping insertion in model container [2021-12-06 22:59:49,481 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,487 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:59:49,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:59:49,620 WARN L230 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_0a1791c6-8142-4852-9c41-59c2af64edcd/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-12-06 22:59:49,625 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:59:49,631 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:59:49,656 WARN L230 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_0a1791c6-8142-4852-9c41-59c2af64edcd/sv-benchmarks/c/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2021-12-06 22:59:49,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:59:49,674 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:59:49,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49 WrapperNode [2021-12-06 22:59:49,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:59:49,675 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:59:49,675 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:59:49,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:59:49,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,710 INFO L137 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2021-12-06 22:59:49,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:59:49,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:59:49,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:59:49,712 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:59:49,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:59:49,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:59:49,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:59:49,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:59:49,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (1/1) ... [2021-12-06 22:59:49,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:59:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:49,762 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:59:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:59:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:59:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:59:49,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-06 22:59:49,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-06 22:59:49,792 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:59:49,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:59:49,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:59:49,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:59:49,794 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-06 22:59:49,864 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:59:49,866 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:59:50,067 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:59:50,128 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:59:50,129 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 22:59:50,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:59:50 BoogieIcfgContainer [2021-12-06 22:59:50,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:59:50,132 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:59:50,132 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:59:50,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:59:50,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:59:49" (1/3) ... [2021-12-06 22:59:50,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:59:50, skipping insertion in model container [2021-12-06 22:59:50,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:49" (2/3) ... [2021-12-06 22:59:50,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3373201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:59:50, skipping insertion in model container [2021-12-06 22:59:50,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:59:50" (3/3) ... [2021-12-06 22:59:50,137 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2021-12-06 22:59:50,140 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-06 22:59:50,141 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:59:50,141 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:59:50,141 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-06 22:59:50,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,163 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,164 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,165 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,166 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,167 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,167 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,167 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,167 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,168 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,169 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,170 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,171 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,173 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,174 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,175 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,175 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,176 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-06 22:59:50,178 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-06 22:59:50,213 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:59:50,219 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:59:50,219 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-06 22:59:50,230 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 145 transitions, 306 flow [2021-12-06 22:59:50,281 INFO L129 PetriNetUnfolder]: 11/143 cut-off events. [2021-12-06 22:59:50,282 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:59:50,284 INFO L84 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 143 events. 11/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 78 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 106. Up to 3 conditions per place. [2021-12-06 22:59:50,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 145 transitions, 306 flow [2021-12-06 22:59:50,289 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 134 transitions, 280 flow [2021-12-06 22:59:50,313 INFO L129 PetriNetUnfolder]: 11/133 cut-off events. [2021-12-06 22:59:50,313 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-06 22:59:50,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:50,314 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:50,315 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:50,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash 956022790, now seen corresponding path program 1 times [2021-12-06 22:59:50,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483037613] [2021-12-06 22:59:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:50,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:50,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:50,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483037613] [2021-12-06 22:59:50,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483037613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:50,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:50,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:59:50,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019825252] [2021-12-06 22:59:50,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:50,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:59:50,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:59:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:59:50,517 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 145 [2021-12-06 22:59:50,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 280 flow. Second operand has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:50,521 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 145 [2021-12-06 22:59:50,522 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:50,566 INFO L129 PetriNetUnfolder]: 12/160 cut-off events. [2021-12-06 22:59:50,567 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-06 22:59:50,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 160 events. 12/160 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 203 event pairs, 5 based on Foata normal form. 14/161 useless extension candidates. Maximal degree in co-relation 104. Up to 22 conditions per place. [2021-12-06 22:59:50,569 INFO L132 encePairwiseOnDemand]: 137/145 looper letters, 7 selfloop transitions, 0 changer transitions 4/126 dead transitions. [2021-12-06 22:59:50,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 278 flow [2021-12-06 22:59:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:59:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-06 22:59:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2021-12-06 22:59:50,579 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9413793103448276 [2021-12-06 22:59:50,579 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2021-12-06 22:59:50,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2021-12-06 22:59:50,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:50,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2021-12-06 22:59:50,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,590 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,591 INFO L186 Difference]: Start difference. First operand has 130 places, 134 transitions, 280 flow. Second operand 2 states and 273 transitions. [2021-12-06 22:59:50,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 278 flow [2021-12-06 22:59:50,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 126 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:59:50,598 INFO L242 Difference]: Finished difference. Result has 127 places, 122 transitions, 248 flow [2021-12-06 22:59:50,599 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=248, PETRI_PLACES=127, PETRI_TRANSITIONS=122} [2021-12-06 22:59:50,602 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -3 predicate places. [2021-12-06 22:59:50,602 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 122 transitions, 248 flow [2021-12-06 22:59:50,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,603 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:50,603 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:50,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:59:50,603 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:50,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:50,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1518951431, now seen corresponding path program 1 times [2021-12-06 22:59:50,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:50,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014944328] [2021-12-06 22:59:50,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:50,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:50,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:50,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:50,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014944328] [2021-12-06 22:59:50,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014944328] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:50,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:50,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:50,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150904277] [2021-12-06 22:59:50,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:50,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:50,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:50,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:50,748 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 145 [2021-12-06 22:59:50,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 122 transitions, 248 flow. Second operand has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:50,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 145 [2021-12-06 22:59:50,750 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:50,836 INFO L129 PetriNetUnfolder]: 12/193 cut-off events. [2021-12-06 22:59:50,836 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-06 22:59:50,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 193 events. 12/193 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 294 event pairs, 5 based on Foata normal form. 5/187 useless extension candidates. Maximal degree in co-relation 241. Up to 31 conditions per place. [2021-12-06 22:59:50,838 INFO L132 encePairwiseOnDemand]: 135/145 looper letters, 19 selfloop transitions, 6 changer transitions 3/129 dead transitions. [2021-12-06 22:59:50,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 129 transitions, 320 flow [2021-12-06 22:59:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:59:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-06 22:59:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 836 transitions. [2021-12-06 22:59:50,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8236453201970443 [2021-12-06 22:59:50,843 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 836 transitions. [2021-12-06 22:59:50,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 836 transitions. [2021-12-06 22:59:50,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:50,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 836 transitions. [2021-12-06 22:59:50,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 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) [2021-12-06 22:59:50,853 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 145.0) internal successors, (1160), 8 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) [2021-12-06 22:59:50,854 INFO L186 Difference]: Start difference. First operand has 127 places, 122 transitions, 248 flow. Second operand 7 states and 836 transitions. [2021-12-06 22:59:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 129 transitions, 320 flow [2021-12-06 22:59:50,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 129 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-06 22:59:50,857 INFO L242 Difference]: Finished difference. Result has 131 places, 123 transitions, 274 flow [2021-12-06 22:59:50,857 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=131, PETRI_TRANSITIONS=123} [2021-12-06 22:59:50,858 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 1 predicate places. [2021-12-06 22:59:50,858 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 123 transitions, 274 flow [2021-12-06 22:59:50,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,859 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:50,859 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:50,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:59:50,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash 635041614, now seen corresponding path program 1 times [2021-12-06 22:59:50,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:50,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335748956] [2021-12-06 22:59:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:50,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:50,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:50,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335748956] [2021-12-06 22:59:50,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335748956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:50,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:50,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:50,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673360512] [2021-12-06 22:59:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:50,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:50,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:50,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:50,996 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 145 [2021-12-06 22:59:50,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 123 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:50,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:50,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 145 [2021-12-06 22:59:50,997 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:51,040 INFO L129 PetriNetUnfolder]: 12/163 cut-off events. [2021-12-06 22:59:51,040 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2021-12-06 22:59:51,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 163 events. 12/163 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 1 based on Foata normal form. 1/159 useless extension candidates. Maximal degree in co-relation 216. Up to 22 conditions per place. [2021-12-06 22:59:51,042 INFO L132 encePairwiseOnDemand]: 139/145 looper letters, 12 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2021-12-06 22:59:51,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 126 transitions, 319 flow [2021-12-06 22:59:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-06 22:59:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2021-12-06 22:59:51,044 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8827586206896552 [2021-12-06 22:59:51,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2021-12-06 22:59:51,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2021-12-06 22:59:51,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:51,044 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2021-12-06 22:59:51,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,047 INFO L186 Difference]: Start difference. First operand has 131 places, 123 transitions, 274 flow. Second operand 3 states and 384 transitions. [2021-12-06 22:59:51,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 126 transitions, 319 flow [2021-12-06 22:59:51,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 126 transitions, 309 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-06 22:59:51,051 INFO L242 Difference]: Finished difference. Result has 129 places, 125 transitions, 293 flow [2021-12-06 22:59:51,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=129, PETRI_TRANSITIONS=125} [2021-12-06 22:59:51,052 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, -1 predicate places. [2021-12-06 22:59:51,052 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 125 transitions, 293 flow [2021-12-06 22:59:51,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,052 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:51,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:51,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:59:51,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1090197722, now seen corresponding path program 2 times [2021-12-06 22:59:51,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:51,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032451197] [2021-12-06 22:59:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:51,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:51,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032451197] [2021-12-06 22:59:51,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032451197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:51,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:51,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:51,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840386567] [2021-12-06 22:59:51,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:51,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:51,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:51,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:51,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:51,492 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:51,494 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 125 transitions, 293 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,494 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:51,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:51,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:51,842 INFO L129 PetriNetUnfolder]: 120/413 cut-off events. [2021-12-06 22:59:51,842 INFO L130 PetriNetUnfolder]: For 98/98 co-relation queries the response was YES. [2021-12-06 22:59:51,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 413 events. 120/413 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1611 event pairs, 19 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 803. Up to 174 conditions per place. [2021-12-06 22:59:51,846 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 64 selfloop transitions, 21 changer transitions 6/171 dead transitions. [2021-12-06 22:59:51,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 171 transitions, 604 flow [2021-12-06 22:59:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:59:51,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 22:59:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1605 transitions. [2021-12-06 22:59:51,850 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6511156186612576 [2021-12-06 22:59:51,850 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1605 transitions. [2021-12-06 22:59:51,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1605 transitions. [2021-12-06 22:59:51,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:51,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1605 transitions. [2021-12-06 22:59:51,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.41176470588235) internal successors, (1605), 17 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:51,861 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:51,861 INFO L186 Difference]: Start difference. First operand has 129 places, 125 transitions, 293 flow. Second operand 17 states and 1605 transitions. [2021-12-06 22:59:51,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 171 transitions, 604 flow [2021-12-06 22:59:51,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 171 transitions, 574 flow, removed 12 selfloop flow, removed 2 redundant places. [2021-12-06 22:59:51,867 INFO L242 Difference]: Finished difference. Result has 151 places, 141 transitions, 395 flow [2021-12-06 22:59:51,867 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=395, PETRI_PLACES=151, PETRI_TRANSITIONS=141} [2021-12-06 22:59:51,868 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 21 predicate places. [2021-12-06 22:59:51,868 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 141 transitions, 395 flow [2021-12-06 22:59:51,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:51,869 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:51,869 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:51,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:59:51,869 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1592501492, now seen corresponding path program 3 times [2021-12-06 22:59:51,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:51,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885772133] [2021-12-06 22:59:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:51,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:52,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885772133] [2021-12-06 22:59:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885772133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:52,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:52,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954986027] [2021-12-06 22:59:52,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:52,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:52,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:52,225 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 141 transitions, 395 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,225 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:52,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:52,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:52,614 INFO L129 PetriNetUnfolder]: 130/473 cut-off events. [2021-12-06 22:59:52,614 INFO L130 PetriNetUnfolder]: For 203/203 co-relation queries the response was YES. [2021-12-06 22:59:52,615 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 473 events. 130/473 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2165 event pairs, 18 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1053. Up to 172 conditions per place. [2021-12-06 22:59:52,618 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 69 selfloop transitions, 26 changer transitions 6/181 dead transitions. [2021-12-06 22:59:52,618 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 181 transitions, 755 flow [2021-12-06 22:59:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:59:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-06 22:59:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1701 transitions. [2021-12-06 22:59:52,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-12-06 22:59:52,623 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1701 transitions. [2021-12-06 22:59:52,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1701 transitions. [2021-12-06 22:59:52,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:52,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1701 transitions. [2021-12-06 22:59:52,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 94.5) internal successors, (1701), 18 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,633 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,633 INFO L186 Difference]: Start difference. First operand has 151 places, 141 transitions, 395 flow. Second operand 18 states and 1701 transitions. [2021-12-06 22:59:52,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 181 transitions, 755 flow [2021-12-06 22:59:52,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 181 transitions, 735 flow, removed 6 selfloop flow, removed 7 redundant places. [2021-12-06 22:59:52,639 INFO L242 Difference]: Finished difference. Result has 164 places, 146 transitions, 482 flow [2021-12-06 22:59:52,640 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=482, PETRI_PLACES=164, PETRI_TRANSITIONS=146} [2021-12-06 22:59:52,640 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 34 predicate places. [2021-12-06 22:59:52,640 INFO L470 AbstractCegarLoop]: Abstraction has has 164 places, 146 transitions, 482 flow [2021-12-06 22:59:52,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,641 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:52,641 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:52,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:59:52,642 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:52,642 INFO L85 PathProgramCache]: Analyzing trace with hash -310511406, now seen corresponding path program 4 times [2021-12-06 22:59:52,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:52,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366375754] [2021-12-06 22:59:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:52,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:52,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:52,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366375754] [2021-12-06 22:59:52,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366375754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:52,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:52,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:52,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296860383] [2021-12-06 22:59:52,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:52,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:52,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:52,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:52,965 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:52,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 146 transitions, 482 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:52,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:52,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:52,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:53,311 INFO L129 PetriNetUnfolder]: 141/517 cut-off events. [2021-12-06 22:59:53,311 INFO L130 PetriNetUnfolder]: For 513/513 co-relation queries the response was YES. [2021-12-06 22:59:53,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1339 conditions, 517 events. 141/517 cut-off events. For 513/513 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2543 event pairs, 46 based on Foata normal form. 1/510 useless extension candidates. Maximal degree in co-relation 1321. Up to 229 conditions per place. [2021-12-06 22:59:53,316 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 70 selfloop transitions, 29 changer transitions 6/185 dead transitions. [2021-12-06 22:59:53,316 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 185 transitions, 901 flow [2021-12-06 22:59:53,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1517 transitions. [2021-12-06 22:59:53,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538793103448276 [2021-12-06 22:59:53,321 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1517 transitions. [2021-12-06 22:59:53,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1517 transitions. [2021-12-06 22:59:53,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:53,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1517 transitions. [2021-12-06 22:59:53,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.8125) internal successors, (1517), 16 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,330 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,330 INFO L186 Difference]: Start difference. First operand has 164 places, 146 transitions, 482 flow. Second operand 16 states and 1517 transitions. [2021-12-06 22:59:53,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 185 transitions, 901 flow [2021-12-06 22:59:53,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 185 transitions, 813 flow, removed 26 selfloop flow, removed 12 redundant places. [2021-12-06 22:59:53,338 INFO L242 Difference]: Finished difference. Result has 172 places, 158 transitions, 615 flow [2021-12-06 22:59:53,338 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=615, PETRI_PLACES=172, PETRI_TRANSITIONS=158} [2021-12-06 22:59:53,339 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 42 predicate places. [2021-12-06 22:59:53,339 INFO L470 AbstractCegarLoop]: Abstraction has has 172 places, 158 transitions, 615 flow [2021-12-06 22:59:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,340 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:53,340 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:53,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:59:53,340 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:53,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1331714556, now seen corresponding path program 5 times [2021-12-06 22:59:53,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:53,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048437965] [2021-12-06 22:59:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:53,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:53,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:53,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048437965] [2021-12-06 22:59:53,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048437965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:53,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:53,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:53,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105891447] [2021-12-06 22:59:53,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:53,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:53,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:53,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:53,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:53,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:53,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 158 transitions, 615 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:53,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:53,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:53,951 INFO L129 PetriNetUnfolder]: 145/538 cut-off events. [2021-12-06 22:59:53,951 INFO L130 PetriNetUnfolder]: For 746/746 co-relation queries the response was YES. [2021-12-06 22:59:53,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 538 events. 145/538 cut-off events. For 746/746 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2705 event pairs, 48 based on Foata normal form. 1/529 useless extension candidates. Maximal degree in co-relation 1506. Up to 241 conditions per place. [2021-12-06 22:59:53,956 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 74 selfloop transitions, 35 changer transitions 6/195 dead transitions. [2021-12-06 22:59:53,956 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 195 transitions, 1077 flow [2021-12-06 22:59:53,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:53,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1519 transitions. [2021-12-06 22:59:53,960 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6547413793103448 [2021-12-06 22:59:53,961 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1519 transitions. [2021-12-06 22:59:53,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1519 transitions. [2021-12-06 22:59:53,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:53,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1519 transitions. [2021-12-06 22:59:53,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.9375) internal successors, (1519), 16 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,969 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,969 INFO L186 Difference]: Start difference. First operand has 172 places, 158 transitions, 615 flow. Second operand 16 states and 1519 transitions. [2021-12-06 22:59:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 195 transitions, 1077 flow [2021-12-06 22:59:53,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 195 transitions, 1016 flow, removed 15 selfloop flow, removed 9 redundant places. [2021-12-06 22:59:53,977 INFO L242 Difference]: Finished difference. Result has 183 places, 171 transitions, 815 flow [2021-12-06 22:59:53,978 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=815, PETRI_PLACES=183, PETRI_TRANSITIONS=171} [2021-12-06 22:59:53,978 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 53 predicate places. [2021-12-06 22:59:53,978 INFO L470 AbstractCegarLoop]: Abstraction has has 183 places, 171 transitions, 815 flow [2021-12-06 22:59:53,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:53,979 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:53,979 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:53,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:59:53,979 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash 496787528, now seen corresponding path program 6 times [2021-12-06 22:59:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:53,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639017125] [2021-12-06 22:59:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:53,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:54,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:54,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639017125] [2021-12-06 22:59:54,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639017125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:54,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:54,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:54,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117639974] [2021-12-06 22:59:54,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:54,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:54,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:54,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:54,238 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:54,239 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 171 transitions, 815 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,239 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:54,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:54,240 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:54,536 INFO L129 PetriNetUnfolder]: 146/545 cut-off events. [2021-12-06 22:59:54,537 INFO L130 PetriNetUnfolder]: For 1213/1213 co-relation queries the response was YES. [2021-12-06 22:59:54,541 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1681 conditions, 545 events. 146/545 cut-off events. For 1213/1213 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2805 event pairs, 43 based on Foata normal form. 1/536 useless extension candidates. Maximal degree in co-relation 1652. Up to 255 conditions per place. [2021-12-06 22:59:54,544 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 78 selfloop transitions, 30 changer transitions 7/195 dead transitions. [2021-12-06 22:59:54,545 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 195 transitions, 1186 flow [2021-12-06 22:59:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1512 transitions. [2021-12-06 22:59:54,550 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6517241379310345 [2021-12-06 22:59:54,550 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1512 transitions. [2021-12-06 22:59:54,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1512 transitions. [2021-12-06 22:59:54,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:54,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1512 transitions. [2021-12-06 22:59:54,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.5) internal successors, (1512), 16 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,561 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,561 INFO L186 Difference]: Start difference. First operand has 183 places, 171 transitions, 815 flow. Second operand 16 states and 1512 transitions. [2021-12-06 22:59:54,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 195 transitions, 1186 flow [2021-12-06 22:59:54,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 195 transitions, 1105 flow, removed 36 selfloop flow, removed 7 redundant places. [2021-12-06 22:59:54,570 INFO L242 Difference]: Finished difference. Result has 192 places, 173 transitions, 832 flow [2021-12-06 22:59:54,570 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=832, PETRI_PLACES=192, PETRI_TRANSITIONS=173} [2021-12-06 22:59:54,571 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 62 predicate places. [2021-12-06 22:59:54,571 INFO L470 AbstractCegarLoop]: Abstraction has has 192 places, 173 transitions, 832 flow [2021-12-06 22:59:54,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:54,572 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:54,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:59:54,572 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:54,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:54,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1259341386, now seen corresponding path program 7 times [2021-12-06 22:59:54,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:54,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439359506] [2021-12-06 22:59:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:54,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:54,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:54,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439359506] [2021-12-06 22:59:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439359506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:54,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:54,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:54,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723148656] [2021-12-06 22:59:54,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:54,865 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:54,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 173 transitions, 832 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:54,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:54,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:54,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:55,165 INFO L129 PetriNetUnfolder]: 149/551 cut-off events. [2021-12-06 22:59:55,166 INFO L130 PetriNetUnfolder]: For 1324/1324 co-relation queries the response was YES. [2021-12-06 22:59:55,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1713 conditions, 551 events. 149/551 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2866 event pairs, 45 based on Foata normal form. 1/543 useless extension candidates. Maximal degree in co-relation 1683. Up to 255 conditions per place. [2021-12-06 22:59:55,170 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 31 changer transitions 6/197 dead transitions. [2021-12-06 22:59:55,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 197 transitions, 1212 flow [2021-12-06 22:59:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:55,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:55,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-12-06 22:59:55,174 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-12-06 22:59:55,174 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-12-06 22:59:55,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-12-06 22:59:55,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:55,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-12-06 22:59:55,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,182 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,182 INFO L186 Difference]: Start difference. First operand has 192 places, 173 transitions, 832 flow. Second operand 16 states and 1514 transitions. [2021-12-06 22:59:55,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 197 transitions, 1212 flow [2021-12-06 22:59:55,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1141 flow, removed 11 selfloop flow, removed 12 redundant places. [2021-12-06 22:59:55,190 INFO L242 Difference]: Finished difference. Result has 195 places, 174 transitions, 855 flow [2021-12-06 22:59:55,191 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=855, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2021-12-06 22:59:55,191 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 65 predicate places. [2021-12-06 22:59:55,191 INFO L470 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 855 flow [2021-12-06 22:59:55,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,192 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:55,192 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:55,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:59:55,192 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2033596040, now seen corresponding path program 8 times [2021-12-06 22:59:55,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:55,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287925548] [2021-12-06 22:59:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:55,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:55,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:55,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287925548] [2021-12-06 22:59:55,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287925548] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:55,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:55,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:55,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108070964] [2021-12-06 22:59:55,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:55,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:55,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:55,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:55,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:55,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:55,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 855 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:55,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:55,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:55,829 INFO L129 PetriNetUnfolder]: 153/574 cut-off events. [2021-12-06 22:59:55,829 INFO L130 PetriNetUnfolder]: For 1672/1672 co-relation queries the response was YES. [2021-12-06 22:59:55,831 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 574 events. 153/574 cut-off events. For 1672/1672 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3089 event pairs, 47 based on Foata normal form. 1/566 useless extension candidates. Maximal degree in co-relation 1785. Up to 247 conditions per place. [2021-12-06 22:59:55,835 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 80 selfloop transitions, 36 changer transitions 6/202 dead transitions. [2021-12-06 22:59:55,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 202 transitions, 1285 flow [2021-12-06 22:59:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:59:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 22:59:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1607 transitions. [2021-12-06 22:59:55,837 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6519269776876268 [2021-12-06 22:59:55,837 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1607 transitions. [2021-12-06 22:59:55,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1607 transitions. [2021-12-06 22:59:55,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:55,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1607 transitions. [2021-12-06 22:59:55,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.52941176470588) internal successors, (1607), 17 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:55,844 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:55,844 INFO L186 Difference]: Start difference. First operand has 195 places, 174 transitions, 855 flow. Second operand 17 states and 1607 transitions. [2021-12-06 22:59:55,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 202 transitions, 1285 flow [2021-12-06 22:59:55,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 202 transitions, 1201 flow, removed 12 selfloop flow, removed 14 redundant places. [2021-12-06 22:59:55,852 INFO L242 Difference]: Finished difference. Result has 200 places, 177 transitions, 908 flow [2021-12-06 22:59:55,853 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=908, PETRI_PLACES=200, PETRI_TRANSITIONS=177} [2021-12-06 22:59:55,853 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 70 predicate places. [2021-12-06 22:59:55,854 INFO L470 AbstractCegarLoop]: Abstraction has has 200 places, 177 transitions, 908 flow [2021-12-06 22:59:55,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:55,854 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:55,854 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:55,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:59:55,855 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1724094068, now seen corresponding path program 9 times [2021-12-06 22:59:55,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:55,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663981072] [2021-12-06 22:59:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:55,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:56,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663981072] [2021-12-06 22:59:56,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663981072] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:56,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:56,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:56,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160263065] [2021-12-06 22:59:56,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:56,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:56,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:56,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:56,101 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 177 transitions, 908 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,101 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:56,101 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:56,101 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:56,424 INFO L129 PetriNetUnfolder]: 154/581 cut-off events. [2021-12-06 22:59:56,424 INFO L130 PetriNetUnfolder]: For 2009/2009 co-relation queries the response was YES. [2021-12-06 22:59:56,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 581 events. 154/581 cut-off events. For 2009/2009 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3154 event pairs, 53 based on Foata normal form. 1/570 useless extension candidates. Maximal degree in co-relation 1867. Up to 275 conditions per place. [2021-12-06 22:59:56,429 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 83 selfloop transitions, 32 changer transitions 7/202 dead transitions. [2021-12-06 22:59:56,430 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 202 transitions, 1346 flow [2021-12-06 22:59:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1514 transitions. [2021-12-06 22:59:56,432 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6525862068965518 [2021-12-06 22:59:56,432 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1514 transitions. [2021-12-06 22:59:56,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1514 transitions. [2021-12-06 22:59:56,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:56,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1514 transitions. [2021-12-06 22:59:56,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,437 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,437 INFO L186 Difference]: Start difference. First operand has 200 places, 177 transitions, 908 flow. Second operand 16 states and 1514 transitions. [2021-12-06 22:59:56,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 202 transitions, 1346 flow [2021-12-06 22:59:56,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 202 transitions, 1234 flow, removed 24 selfloop flow, removed 13 redundant places. [2021-12-06 22:59:56,447 INFO L242 Difference]: Finished difference. Result has 203 places, 179 transitions, 921 flow [2021-12-06 22:59:56,448 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=921, PETRI_PLACES=203, PETRI_TRANSITIONS=179} [2021-12-06 22:59:56,448 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 73 predicate places. [2021-12-06 22:59:56,448 INFO L470 AbstractCegarLoop]: Abstraction has has 203 places, 179 transitions, 921 flow [2021-12-06 22:59:56,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,449 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:56,449 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:56,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:59:56,449 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:56,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1551141820, now seen corresponding path program 10 times [2021-12-06 22:59:56,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:56,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224426877] [2021-12-06 22:59:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:56,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:56,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224426877] [2021-12-06 22:59:56,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224426877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:56,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:56,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834508960] [2021-12-06 22:59:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:56,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:56,745 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:56,746 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 179 transitions, 921 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:56,746 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:56,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:56,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:57,066 INFO L129 PetriNetUnfolder]: 157/584 cut-off events. [2021-12-06 22:59:57,066 INFO L130 PetriNetUnfolder]: For 1973/1973 co-relation queries the response was YES. [2021-12-06 22:59:57,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 584 events. 157/584 cut-off events. For 1973/1973 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3188 event pairs, 47 based on Foata normal form. 1/573 useless extension candidates. Maximal degree in co-relation 1878. Up to 275 conditions per place. [2021-12-06 22:59:57,073 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 33 changer transitions 6/204 dead transitions. [2021-12-06 22:59:57,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 204 transitions, 1348 flow [2021-12-06 22:59:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-12-06 22:59:57,076 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-12-06 22:59:57,076 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-12-06 22:59:57,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-12-06 22:59:57,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:57,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-12-06 22:59:57,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,083 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,083 INFO L186 Difference]: Start difference. First operand has 203 places, 179 transitions, 921 flow. Second operand 16 states and 1516 transitions. [2021-12-06 22:59:57,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 204 transitions, 1348 flow [2021-12-06 22:59:57,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 204 transitions, 1270 flow, removed 13 selfloop flow, removed 12 redundant places. [2021-12-06 22:59:57,092 INFO L242 Difference]: Finished difference. Result has 206 places, 180 transitions, 945 flow [2021-12-06 22:59:57,093 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=945, PETRI_PLACES=206, PETRI_TRANSITIONS=180} [2021-12-06 22:59:57,093 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 76 predicate places. [2021-12-06 22:59:57,093 INFO L470 AbstractCegarLoop]: Abstraction has has 206 places, 180 transitions, 945 flow [2021-12-06 22:59:57,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,094 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:57,094 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:57,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:59:57,094 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:57,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:57,094 INFO L85 PathProgramCache]: Analyzing trace with hash -292756896, now seen corresponding path program 11 times [2021-12-06 22:59:57,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:57,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312620551] [2021-12-06 22:59:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:57,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:57,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:57,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312620551] [2021-12-06 22:59:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312620551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:57,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:57,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:57,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951614146] [2021-12-06 22:59:57,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:57,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:57,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:57,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:57,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:57,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:57,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 180 transitions, 945 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:57,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:57,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:57,691 INFO L129 PetriNetUnfolder]: 159/598 cut-off events. [2021-12-06 22:59:57,691 INFO L130 PetriNetUnfolder]: For 2405/2405 co-relation queries the response was YES. [2021-12-06 22:59:57,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1989 conditions, 598 events. 159/598 cut-off events. For 2405/2405 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3307 event pairs, 51 based on Foata normal form. 1/588 useless extension candidates. Maximal degree in co-relation 1953. Up to 261 conditions per place. [2021-12-06 22:59:57,698 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 82 selfloop transitions, 39 changer transitions 6/207 dead transitions. [2021-12-06 22:59:57,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 207 transitions, 1407 flow [2021-12-06 22:59:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:59:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-06 22:59:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1609 transitions. [2021-12-06 22:59:57,701 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.652738336713996 [2021-12-06 22:59:57,702 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1609 transitions. [2021-12-06 22:59:57,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1609 transitions. [2021-12-06 22:59:57,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:57,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1609 transitions. [2021-12-06 22:59:57,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.6470588235294) internal successors, (1609), 17 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:57,709 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 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) [2021-12-06 22:59:57,709 INFO L186 Difference]: Start difference. First operand has 206 places, 180 transitions, 945 flow. Second operand 17 states and 1609 transitions. [2021-12-06 22:59:57,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 207 transitions, 1407 flow [2021-12-06 22:59:57,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 207 transitions, 1315 flow, removed 14 selfloop flow, removed 14 redundant places. [2021-12-06 22:59:57,725 INFO L242 Difference]: Finished difference. Result has 210 places, 182 transitions, 986 flow [2021-12-06 22:59:57,725 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=986, PETRI_PLACES=210, PETRI_TRANSITIONS=182} [2021-12-06 22:59:57,726 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 80 predicate places. [2021-12-06 22:59:57,726 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 182 transitions, 986 flow [2021-12-06 22:59:57,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:57,727 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:57,727 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:59:57,727 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:57,728 INFO L85 PathProgramCache]: Analyzing trace with hash 789017708, now seen corresponding path program 12 times [2021-12-06 22:59:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:57,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292121247] [2021-12-06 22:59:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:57,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:57,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:58,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292121247] [2021-12-06 22:59:58,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292121247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:58,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:58,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:58,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108803916] [2021-12-06 22:59:58,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:58,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:58,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:58,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:58,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:58,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:58,005 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 182 transitions, 986 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,005 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:58,005 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:58,005 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:58,335 INFO L129 PetriNetUnfolder]: 160/599 cut-off events. [2021-12-06 22:59:58,336 INFO L130 PetriNetUnfolder]: For 2745/2745 co-relation queries the response was YES. [2021-12-06 22:59:58,339 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 599 events. 160/599 cut-off events. For 2745/2745 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3272 event pairs, 79 based on Foata normal form. 1/585 useless extension candidates. Maximal degree in co-relation 2016. Up to 289 conditions per place. [2021-12-06 22:59:58,343 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 85 selfloop transitions, 35 changer transitions 7/207 dead transitions. [2021-12-06 22:59:58,343 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 207 transitions, 1465 flow [2021-12-06 22:59:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1516 transitions. [2021-12-06 22:59:58,346 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.653448275862069 [2021-12-06 22:59:58,346 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1516 transitions. [2021-12-06 22:59:58,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1516 transitions. [2021-12-06 22:59:58,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:58,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1516 transitions. [2021-12-06 22:59:58,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.75) internal successors, (1516), 16 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,353 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,353 INFO L186 Difference]: Start difference. First operand has 210 places, 182 transitions, 986 flow. Second operand 16 states and 1516 transitions. [2021-12-06 22:59:58,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 207 transitions, 1465 flow [2021-12-06 22:59:58,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 207 transitions, 1334 flow, removed 28 selfloop flow, removed 14 redundant places. [2021-12-06 22:59:58,370 INFO L242 Difference]: Finished difference. Result has 212 places, 184 transitions, 991 flow [2021-12-06 22:59:58,370 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=991, PETRI_PLACES=212, PETRI_TRANSITIONS=184} [2021-12-06 22:59:58,371 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 82 predicate places. [2021-12-06 22:59:58,371 INFO L470 AbstractCegarLoop]: Abstraction has has 212 places, 184 transitions, 991 flow [2021-12-06 22:59:58,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,371 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:58,371 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:59:58,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1447154114, now seen corresponding path program 13 times [2021-12-06 22:59:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438622865] [2021-12-06 22:59:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:58,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:58,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438622865] [2021-12-06 22:59:58,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438622865] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:58,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:58,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 22:59:58,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309196429] [2021-12-06 22:59:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:58,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:59:58,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:59:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:59:58,689 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 145 [2021-12-06 22:59:58,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 184 transitions, 991 flow. Second operand has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:58,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 145 [2021-12-06 22:59:58,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:58,967 INFO L129 PetriNetUnfolder]: 163/605 cut-off events. [2021-12-06 22:59:58,967 INFO L130 PetriNetUnfolder]: For 2717/2717 co-relation queries the response was YES. [2021-12-06 22:59:58,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 605 events. 163/605 cut-off events. For 2717/2717 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3286 event pairs, 82 based on Foata normal form. 1/592 useless extension candidates. Maximal degree in co-relation 2024. Up to 289 conditions per place. [2021-12-06 22:59:58,972 INFO L132 encePairwiseOnDemand]: 128/145 looper letters, 87 selfloop transitions, 36 changer transitions 6/209 dead transitions. [2021-12-06 22:59:58,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 209 transitions, 1457 flow [2021-12-06 22:59:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:59:58,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-12-06 22:59:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1518 transitions. [2021-12-06 22:59:58,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6543103448275862 [2021-12-06 22:59:58,974 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1518 transitions. [2021-12-06 22:59:58,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1518 transitions. [2021-12-06 22:59:58,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:58,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1518 transitions. [2021-12-06 22:59:58,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.875) internal successors, (1518), 16 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,985 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 145.0) internal successors, (2465), 17 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:58,986 INFO L186 Difference]: Start difference. First operand has 212 places, 184 transitions, 991 flow. Second operand 16 states and 1518 transitions. [2021-12-06 22:59:58,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 209 transitions, 1457 flow [2021-12-06 22:59:58,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 209 transitions, 1370 flow, removed 15 selfloop flow, removed 12 redundant places. [2021-12-06 22:59:59,002 INFO L242 Difference]: Finished difference. Result has 215 places, 185 transitions, 1016 flow [2021-12-06 22:59:59,003 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1016, PETRI_PLACES=215, PETRI_TRANSITIONS=185} [2021-12-06 22:59:59,003 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 85 predicate places. [2021-12-06 22:59:59,003 INFO L470 AbstractCegarLoop]: Abstraction has has 215 places, 185 transitions, 1016 flow [2021-12-06 22:59:59,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 91.3125) internal successors, (1461), 16 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,004 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:59,004 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:59,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:59:59,005 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:59,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash -414570916, now seen corresponding path program 1 times [2021-12-06 22:59:59,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:59,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471775141] [2021-12-06 22:59:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:59,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:59:59,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:59,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471775141] [2021-12-06 22:59:59,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471775141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:59,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:59,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:59:59,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574653978] [2021-12-06 22:59:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:59,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:59:59,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:59:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:59:59,046 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 145 [2021-12-06 22:59:59,047 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 185 transitions, 1016 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,047 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:59,047 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 145 [2021-12-06 22:59:59,047 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 22:59:59,139 INFO L129 PetriNetUnfolder]: 42/481 cut-off events. [2021-12-06 22:59:59,139 INFO L130 PetriNetUnfolder]: For 3209/3285 co-relation queries the response was YES. [2021-12-06 22:59:59,142 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 481 events. 42/481 cut-off events. For 3209/3285 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2554 event pairs, 7 based on Foata normal form. 49/523 useless extension candidates. Maximal degree in co-relation 1339. Up to 48 conditions per place. [2021-12-06 22:59:59,144 INFO L132 encePairwiseOnDemand]: 141/145 looper letters, 16 selfloop transitions, 7 changer transitions 36/181 dead transitions. [2021-12-06 22:59:59,144 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 181 transitions, 1014 flow [2021-12-06 22:59:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:59:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-06 22:59:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 523 transitions. [2021-12-06 22:59:59,145 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9017241379310345 [2021-12-06 22:59:59,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 523 transitions. [2021-12-06 22:59:59,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 523 transitions. [2021-12-06 22:59:59,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 22:59:59,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 523 transitions. [2021-12-06 22:59:59,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.75) internal successors, (523), 4 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,148 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,148 INFO L186 Difference]: Start difference. First operand has 215 places, 185 transitions, 1016 flow. Second operand 4 states and 523 transitions. [2021-12-06 22:59:59,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 181 transitions, 1014 flow [2021-12-06 22:59:59,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 181 transitions, 920 flow, removed 3 selfloop flow, removed 19 redundant places. [2021-12-06 22:59:59,161 INFO L242 Difference]: Finished difference. Result has 198 places, 139 transitions, 538 flow [2021-12-06 22:59:59,161 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=538, PETRI_PLACES=198, PETRI_TRANSITIONS=139} [2021-12-06 22:59:59,162 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 68 predicate places. [2021-12-06 22:59:59,162 INFO L470 AbstractCegarLoop]: Abstraction has has 198 places, 139 transitions, 538 flow [2021-12-06 22:59:59,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,162 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 22:59:59,162 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:59:59,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 22:59:59,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 22:59:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:59,163 INFO L85 PathProgramCache]: Analyzing trace with hash 764234139, now seen corresponding path program 1 times [2021-12-06 22:59:59,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:59,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664597901] [2021-12-06 22:59:59,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:59,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:59,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664597901] [2021-12-06 22:59:59,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664597901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214306172] [2021-12-06 22:59:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:59,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:59,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:59,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:59,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:59:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:59:59,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:59,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:59,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214306172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:59,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:59,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-12-06 22:59:59,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996784636] [2021-12-06 22:59:59,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:59,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:59:59,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:59:59,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:59:59,862 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2021-12-06 22:59:59,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 139 transitions, 538 flow. Second operand has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:59,864 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 22:59:59,864 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2021-12-06 22:59:59,864 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:00,051 INFO L129 PetriNetUnfolder]: 40/411 cut-off events. [2021-12-06 23:00:00,051 INFO L130 PetriNetUnfolder]: For 2331/2390 co-relation queries the response was YES. [2021-12-06 23:00:00,053 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 411 events. 40/411 cut-off events. For 2331/2390 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1513 event pairs, 11 based on Foata normal form. 12/416 useless extension candidates. Maximal degree in co-relation 1145. Up to 58 conditions per place. [2021-12-06 23:00:00,054 INFO L132 encePairwiseOnDemand]: 133/145 looper letters, 28 selfloop transitions, 11 changer transitions 6/153 dead transitions. [2021-12-06 23:00:00,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 153 transitions, 697 flow [2021-12-06 23:00:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 23:00:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-06 23:00:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1385 transitions. [2021-12-06 23:00:00,055 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2021-12-06 23:00:00,056 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1385 transitions. [2021-12-06 23:00:00,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1385 transitions. [2021-12-06 23:00:00,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:00,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1385 transitions. [2021-12-06 23:00:00,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.41666666666667) internal successors, (1385), 12 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:00,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:00,059 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 145.0) internal successors, (1885), 13 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:00,059 INFO L186 Difference]: Start difference. First operand has 198 places, 139 transitions, 538 flow. Second operand 12 states and 1385 transitions. [2021-12-06 23:00:00,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 153 transitions, 697 flow [2021-12-06 23:00:00,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 153 transitions, 558 flow, removed 57 selfloop flow, removed 23 redundant places. [2021-12-06 23:00:00,066 INFO L242 Difference]: Finished difference. Result has 162 places, 143 transitions, 484 flow [2021-12-06 23:00:00,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=484, PETRI_PLACES=162, PETRI_TRANSITIONS=143} [2021-12-06 23:00:00,067 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 32 predicate places. [2021-12-06 23:00:00,067 INFO L470 AbstractCegarLoop]: Abstraction has has 162 places, 143 transitions, 484 flow [2021-12-06 23:00:00,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 114.73684210526316) internal successors, (2180), 19 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:00,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:00,068 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:00,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:00:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:00:00,270 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash 59982, now seen corresponding path program 2 times [2021-12-06 23:00:00,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:00,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560771680] [2021-12-06 23:00:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:00,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560771680] [2021-12-06 23:00:00,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560771680] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:00,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718301492] [2021-12-06 23:00:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:00:00,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:00,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:00,772 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:00,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:00:00,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:00:00,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:00:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:01,401 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:01,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:01,610 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:00:01,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 16 [2021-12-06 23:00:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718301492] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:02,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:02,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 14] total 45 [2021-12-06 23:00:02,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217170736] [2021-12-06 23:00:02,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:02,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 23:00:02,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 23:00:02,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1688, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 23:00:02,162 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2021-12-06 23:00:02,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 143 transitions, 484 flow. Second operand has 45 states, 45 states have (on average 76.4888888888889) internal successors, (3442), 45 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:02,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:02,164 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2021-12-06 23:00:02,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:04,065 INFO L129 PetriNetUnfolder]: 691/2484 cut-off events. [2021-12-06 23:00:04,066 INFO L130 PetriNetUnfolder]: For 2187/2257 co-relation queries the response was YES. [2021-12-06 23:00:04,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5693 conditions, 2484 events. 691/2484 cut-off events. For 2187/2257 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 20149 event pairs, 67 based on Foata normal form. 39/2370 useless extension candidates. Maximal degree in co-relation 5671. Up to 302 conditions per place. [2021-12-06 23:00:04,085 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 182 selfloop transitions, 113 changer transitions 0/366 dead transitions. [2021-12-06 23:00:04,085 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 366 transitions, 2033 flow [2021-12-06 23:00:04,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 23:00:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-06 23:00:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3616 transitions. [2021-12-06 23:00:04,090 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5421289355322338 [2021-12-06 23:00:04,090 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3616 transitions. [2021-12-06 23:00:04,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3616 transitions. [2021-12-06 23:00:04,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:04,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3616 transitions. [2021-12-06 23:00:04,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 78.6086956521739) internal successors, (3616), 46 states have internal predecessors, (3616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:04,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:04,101 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:04,101 INFO L186 Difference]: Start difference. First operand has 162 places, 143 transitions, 484 flow. Second operand 46 states and 3616 transitions. [2021-12-06 23:00:04,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 366 transitions, 2033 flow [2021-12-06 23:00:04,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 366 transitions, 1932 flow, removed 46 selfloop flow, removed 6 redundant places. [2021-12-06 23:00:04,110 INFO L242 Difference]: Finished difference. Result has 226 places, 243 transitions, 1508 flow [2021-12-06 23:00:04,110 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=461, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1508, PETRI_PLACES=226, PETRI_TRANSITIONS=243} [2021-12-06 23:00:04,110 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 96 predicate places. [2021-12-06 23:00:04,110 INFO L470 AbstractCegarLoop]: Abstraction has has 226 places, 243 transitions, 1508 flow [2021-12-06 23:00:04,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 76.4888888888889) internal successors, (3442), 45 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:04,111 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:04,111 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:04,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:00:04,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:00:04,312 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash 740015920, now seen corresponding path program 3 times [2021-12-06 23:00:04,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510731556] [2021-12-06 23:00:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:04,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:04,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510731556] [2021-12-06 23:00:04,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510731556] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:04,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20823239] [2021-12-06 23:00:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:00:04,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:04,731 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:04,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:00:04,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 23:00:04,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:00:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:05,206 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:05,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:00:05,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:00:05,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20823239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:00:05,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:00:05,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [22] total 24 [2021-12-06 23:00:05,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841382512] [2021-12-06 23:00:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:00:05,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 23:00:05,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:05,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 23:00:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-12-06 23:00:05,244 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 145 [2021-12-06 23:00:05,244 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 243 transitions, 1508 flow. Second operand has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:05,244 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:05,244 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 145 [2021-12-06 23:00:05,244 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:05,599 INFO L129 PetriNetUnfolder]: 787/2628 cut-off events. [2021-12-06 23:00:05,599 INFO L130 PetriNetUnfolder]: For 14526/14984 co-relation queries the response was YES. [2021-12-06 23:00:05,612 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9284 conditions, 2628 events. 787/2628 cut-off events. For 14526/14984 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21288 event pairs, 205 based on Foata normal form. 96/2569 useless extension candidates. Maximal degree in co-relation 9238. Up to 931 conditions per place. [2021-12-06 23:00:05,628 INFO L132 encePairwiseOnDemand]: 138/145 looper letters, 124 selfloop transitions, 27 changer transitions 0/270 dead transitions. [2021-12-06 23:00:05,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 270 transitions, 2060 flow [2021-12-06 23:00:05,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:00:05,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-06 23:00:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2021-12-06 23:00:05,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8344827586206897 [2021-12-06 23:00:05,629 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2021-12-06 23:00:05,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2021-12-06 23:00:05,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:05,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2021-12-06 23:00:05,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:05,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:05,631 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 145.0) internal successors, (870), 6 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:05,632 INFO L186 Difference]: Start difference. First operand has 226 places, 243 transitions, 1508 flow. Second operand 5 states and 605 transitions. [2021-12-06 23:00:05,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 270 transitions, 2060 flow [2021-12-06 23:00:05,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 270 transitions, 1942 flow, removed 43 selfloop flow, removed 13 redundant places. [2021-12-06 23:00:05,660 INFO L242 Difference]: Finished difference. Result has 219 places, 249 transitions, 1553 flow [2021-12-06 23:00:05,660 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1553, PETRI_PLACES=219, PETRI_TRANSITIONS=249} [2021-12-06 23:00:05,661 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 89 predicate places. [2021-12-06 23:00:05,661 INFO L470 AbstractCegarLoop]: Abstraction has has 219 places, 249 transitions, 1553 flow [2021-12-06 23:00:05,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.6) internal successors, (583), 5 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:05,661 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:05,661 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:05,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:00:05,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:05,862 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:05,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash 377668342, now seen corresponding path program 4 times [2021-12-06 23:00:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:05,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440043954] [2021-12-06 23:00:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:05,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:06,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440043954] [2021-12-06 23:00:06,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440043954] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:06,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099900100] [2021-12-06 23:00:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:00:06,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:06,317 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:06,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:00:06,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:00:06,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:00:06,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:07,001 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:07,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:07,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:07,122 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:00:07,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 16 [2021-12-06 23:00:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:07,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099900100] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:07,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:07,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 14] total 44 [2021-12-06 23:00:07,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914086482] [2021-12-06 23:00:07,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:07,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 23:00:07,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 23:00:07,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:00:07,645 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2021-12-06 23:00:07,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 249 transitions, 1553 flow. Second operand has 44 states, 44 states have (on average 76.5909090909091) internal successors, (3370), 44 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:07,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:07,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2021-12-06 23:00:07,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:09,059 INFO L129 PetriNetUnfolder]: 897/3202 cut-off events. [2021-12-06 23:00:09,060 INFO L130 PetriNetUnfolder]: For 16441/16941 co-relation queries the response was YES. [2021-12-06 23:00:09,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10952 conditions, 3202 events. 897/3202 cut-off events. For 16441/16941 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 28097 event pairs, 140 based on Foata normal form. 242/3321 useless extension candidates. Maximal degree in co-relation 10903. Up to 827 conditions per place. [2021-12-06 23:00:09,089 INFO L132 encePairwiseOnDemand]: 112/145 looper letters, 147 selfloop transitions, 149 changer transitions 0/367 dead transitions. [2021-12-06 23:00:09,089 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 367 transitions, 3054 flow [2021-12-06 23:00:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 23:00:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-12-06 23:00:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2883 transitions. [2021-12-06 23:00:09,092 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5373718546132339 [2021-12-06 23:00:09,092 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2883 transitions. [2021-12-06 23:00:09,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2883 transitions. [2021-12-06 23:00:09,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:09,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2883 transitions. [2021-12-06 23:00:09,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.91891891891892) internal successors, (2883), 37 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:09,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 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) [2021-12-06 23:00:09,115 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 145.0) internal successors, (5510), 38 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) [2021-12-06 23:00:09,115 INFO L186 Difference]: Start difference. First operand has 219 places, 249 transitions, 1553 flow. Second operand 37 states and 2883 transitions. [2021-12-06 23:00:09,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 367 transitions, 3054 flow [2021-12-06 23:00:09,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 367 transitions, 3004 flow, removed 4 selfloop flow, removed 4 redundant places. [2021-12-06 23:00:09,152 INFO L242 Difference]: Finished difference. Result has 259 places, 313 transitions, 2673 flow [2021-12-06 23:00:09,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2673, PETRI_PLACES=259, PETRI_TRANSITIONS=313} [2021-12-06 23:00:09,153 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 129 predicate places. [2021-12-06 23:00:09,153 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 313 transitions, 2673 flow [2021-12-06 23:00:09,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 76.5909090909091) internal successors, (3370), 44 states have internal predecessors, (3370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:09,153 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:09,153 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:09,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:00:09,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:09,355 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash -849077682, now seen corresponding path program 5 times [2021-12-06 23:00:09,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:09,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091208449] [2021-12-06 23:00:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:09,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:09,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091208449] [2021-12-06 23:00:09,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091208449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:09,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342569271] [2021-12-06 23:00:09,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:00:09,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:09,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:09,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:00:09,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 23:00:09,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:09,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 23:00:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:10,328 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:10,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:10,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:10,442 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:00:10,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 16 [2021-12-06 23:00:10,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342569271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:10,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:10,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 39 [2021-12-06 23:00:10,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143473581] [2021-12-06 23:00:10,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:10,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:00:10,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:00:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1150, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 23:00:10,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2021-12-06 23:00:10,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 313 transitions, 2673 flow. Second operand has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:10,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:10,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2021-12-06 23:00:10,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:12,193 INFO L129 PetriNetUnfolder]: 1042/3664 cut-off events. [2021-12-06 23:00:12,193 INFO L130 PetriNetUnfolder]: For 27401/27985 co-relation queries the response was YES. [2021-12-06 23:00:12,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14108 conditions, 3664 events. 1042/3664 cut-off events. For 27401/27985 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33004 event pairs, 169 based on Foata normal form. 282/3807 useless extension candidates. Maximal degree in co-relation 14054. Up to 831 conditions per place. [2021-12-06 23:00:12,227 INFO L132 encePairwiseOnDemand]: 118/145 looper letters, 149 selfloop transitions, 175 changer transitions 0/409 dead transitions. [2021-12-06 23:00:12,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 409 transitions, 4228 flow [2021-12-06 23:00:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 23:00:12,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-12-06 23:00:12,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3167 transitions. [2021-12-06 23:00:12,231 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6618599791013584 [2021-12-06 23:00:12,231 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3167 transitions. [2021-12-06 23:00:12,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3167 transitions. [2021-12-06 23:00:12,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:12,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3167 transitions. [2021-12-06 23:00:12,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.96969696969697) internal successors, (3167), 33 states have internal predecessors, (3167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:12,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 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) [2021-12-06 23:00:12,239 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 145.0) internal successors, (4930), 34 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) [2021-12-06 23:00:12,239 INFO L186 Difference]: Start difference. First operand has 259 places, 313 transitions, 2673 flow. Second operand 33 states and 3167 transitions. [2021-12-06 23:00:12,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 409 transitions, 4228 flow [2021-12-06 23:00:12,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 409 transitions, 4063 flow, removed 43 selfloop flow, removed 26 redundant places. [2021-12-06 23:00:12,316 INFO L242 Difference]: Finished difference. Result has 273 places, 352 transitions, 3642 flow [2021-12-06 23:00:12,316 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2512, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3642, PETRI_PLACES=273, PETRI_TRANSITIONS=352} [2021-12-06 23:00:12,316 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 143 predicate places. [2021-12-06 23:00:12,316 INFO L470 AbstractCegarLoop]: Abstraction has has 273 places, 352 transitions, 3642 flow [2021-12-06 23:00:12,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 94.0) internal successors, (3666), 39 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:12,317 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:12,317 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:12,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:00:12,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 23:00:12,518 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:12,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1139448948, now seen corresponding path program 6 times [2021-12-06 23:00:12,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:12,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856103304] [2021-12-06 23:00:12,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:12,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:12,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856103304] [2021-12-06 23:00:12,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856103304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:12,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998353178] [2021-12-06 23:00:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 23:00:12,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:12,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:12,906 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:12,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:00:12,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 23:00:12,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:12,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 23:00:12,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:13,427 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:13,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:13,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:13,588 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:00:13,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 16 [2021-12-06 23:00:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:14,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998353178] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:14,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:14,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 42 [2021-12-06 23:00:14,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887083387] [2021-12-06 23:00:14,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 23:00:14,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 23:00:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:00:14,167 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 145 [2021-12-06 23:00:14,169 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 352 transitions, 3642 flow. Second operand has 42 states, 42 states have (on average 93.92857142857143) internal successors, (3945), 42 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:14,169 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:14,169 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 145 [2021-12-06 23:00:14,169 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:15,934 INFO L129 PetriNetUnfolder]: 1141/4010 cut-off events. [2021-12-06 23:00:15,934 INFO L130 PetriNetUnfolder]: For 39070/39706 co-relation queries the response was YES. [2021-12-06 23:00:15,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16681 conditions, 4010 events. 1141/4010 cut-off events. For 39070/39706 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 37244 event pairs, 194 based on Foata normal form. 279/4126 useless extension candidates. Maximal degree in co-relation 16619. Up to 946 conditions per place. [2021-12-06 23:00:15,971 INFO L132 encePairwiseOnDemand]: 119/145 looper letters, 160 selfloop transitions, 205 changer transitions 0/450 dead transitions. [2021-12-06 23:00:15,971 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 5440 flow [2021-12-06 23:00:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 23:00:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-06 23:00:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3066 transitions. [2021-12-06 23:00:15,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6607758620689655 [2021-12-06 23:00:15,974 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3066 transitions. [2021-12-06 23:00:15,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3066 transitions. [2021-12-06 23:00:15,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:15,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3066 transitions. [2021-12-06 23:00:15,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.8125) internal successors, (3066), 32 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:15,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 145.0) internal successors, (4785), 33 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:15,999 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 145.0) internal successors, (4785), 33 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:15,999 INFO L186 Difference]: Start difference. First operand has 273 places, 352 transitions, 3642 flow. Second operand 32 states and 3066 transitions. [2021-12-06 23:00:15,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 5440 flow [2021-12-06 23:00:16,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 450 transitions, 5258 flow, removed 48 selfloop flow, removed 23 redundant places. [2021-12-06 23:00:16,152 INFO L242 Difference]: Finished difference. Result has 290 places, 399 transitions, 4917 flow [2021-12-06 23:00:16,153 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3489, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=4917, PETRI_PLACES=290, PETRI_TRANSITIONS=399} [2021-12-06 23:00:16,153 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 160 predicate places. [2021-12-06 23:00:16,153 INFO L470 AbstractCegarLoop]: Abstraction has has 290 places, 399 transitions, 4917 flow [2021-12-06 23:00:16,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 93.92857142857143) internal successors, (3945), 42 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:16,154 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:16,154 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:16,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:00:16,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 23:00:16,355 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1035882360, now seen corresponding path program 7 times [2021-12-06 23:00:16,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:16,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540469633] [2021-12-06 23:00:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:16,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:16,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:16,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540469633] [2021-12-06 23:00:16,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540469633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:16,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689339775] [2021-12-06 23:00:16,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 23:00:16,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:16,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:16,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:16,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:00:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:16,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 23:00:16,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:17,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:00:17,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:00:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 10 [2021-12-06 23:00:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:17,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:17,756 INFO L354 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2021-12-06 23:00:17,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 16 [2021-12-06 23:00:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:18,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689339775] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:18,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:18,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 17] total 48 [2021-12-06 23:00:18,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484227606] [2021-12-06 23:00:18,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:18,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:00:18,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:00:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=1729, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:00:18,224 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 145 [2021-12-06 23:00:18,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 399 transitions, 4917 flow. Second operand has 48 states, 48 states have (on average 76.16666666666667) internal successors, (3656), 48 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:18,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:18,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 145 [2021-12-06 23:00:18,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:21,048 INFO L129 PetriNetUnfolder]: 2220/7261 cut-off events. [2021-12-06 23:00:21,049 INFO L130 PetriNetUnfolder]: For 110023/111714 co-relation queries the response was YES. [2021-12-06 23:00:21,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35247 conditions, 7261 events. 2220/7261 cut-off events. For 110023/111714 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 77525 event pairs, 404 based on Foata normal form. 580/7490 useless extension candidates. Maximal degree in co-relation 35176. Up to 923 conditions per place. [2021-12-06 23:00:21,128 INFO L132 encePairwiseOnDemand]: 113/145 looper letters, 394 selfloop transitions, 353 changer transitions 1/819 dead transitions. [2021-12-06 23:00:21,128 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 819 transitions, 12685 flow [2021-12-06 23:00:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 23:00:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-12-06 23:00:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3939 transitions. [2021-12-06 23:00:21,158 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5433103448275862 [2021-12-06 23:00:21,158 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3939 transitions. [2021-12-06 23:00:21,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3939 transitions. [2021-12-06 23:00:21,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:21,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3939 transitions. [2021-12-06 23:00:21,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 78.78) internal successors, (3939), 50 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:21,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:21,169 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 145.0) internal successors, (7395), 51 states have internal predecessors, (7395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:21,169 INFO L186 Difference]: Start difference. First operand has 290 places, 399 transitions, 4917 flow. Second operand 50 states and 3939 transitions. [2021-12-06 23:00:21,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 819 transitions, 12685 flow [2021-12-06 23:00:21,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 819 transitions, 12389 flow, removed 116 selfloop flow, removed 23 redundant places. [2021-12-06 23:00:21,557 INFO L242 Difference]: Finished difference. Result has 335 places, 600 transitions, 9944 flow [2021-12-06 23:00:21,558 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4675, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=9944, PETRI_PLACES=335, PETRI_TRANSITIONS=600} [2021-12-06 23:00:21,558 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 205 predicate places. [2021-12-06 23:00:21,558 INFO L470 AbstractCegarLoop]: Abstraction has has 335 places, 600 transitions, 9944 flow [2021-12-06 23:00:21,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 76.16666666666667) internal successors, (3656), 48 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:21,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:21,559 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:21,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:00:21,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 23:00:21,760 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:21,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2002982176, now seen corresponding path program 8 times [2021-12-06 23:00:21,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:21,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366572383] [2021-12-06 23:00:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:21,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:22,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366572383] [2021-12-06 23:00:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366572383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257370329] [2021-12-06 23:00:22,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:00:22,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:22,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:22,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:22,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:00:22,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:00:22,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:22,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 23:00:22,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:00:22,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:00:22,949 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:00:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:00:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:23,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:23,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:00:23,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2021-12-06 23:00:23,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 18 [2021-12-06 23:00:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257370329] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:24,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:24,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 53 [2021-12-06 23:00:24,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070545018] [2021-12-06 23:00:24,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:24,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 23:00:24,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 23:00:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2416, Unknown=2, NotChecked=0, Total=2756 [2021-12-06 23:00:24,106 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 145 [2021-12-06 23:00:24,109 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 600 transitions, 9944 flow. Second operand has 53 states, 53 states have (on average 88.30188679245283) internal successors, (4680), 53 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:24,109 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:24,109 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 145 [2021-12-06 23:00:24,109 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:28,152 INFO L129 PetriNetUnfolder]: 3226/10478 cut-off events. [2021-12-06 23:00:28,152 INFO L130 PetriNetUnfolder]: For 252195/256490 co-relation queries the response was YES. [2021-12-06 23:00:28,252 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58305 conditions, 10478 events. 3226/10478 cut-off events. For 252195/256490 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 116338 event pairs, 675 based on Foata normal form. 1117/11046 useless extension candidates. Maximal degree in co-relation 58213. Up to 2401 conditions per place. [2021-12-06 23:00:28,304 INFO L132 encePairwiseOnDemand]: 119/145 looper letters, 428 selfloop transitions, 443 changer transitions 0/953 dead transitions. [2021-12-06 23:00:28,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 953 transitions, 18834 flow [2021-12-06 23:00:28,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 23:00:28,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-06 23:00:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3804 transitions. [2021-12-06 23:00:28,309 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6246305418719211 [2021-12-06 23:00:28,309 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3804 transitions. [2021-12-06 23:00:28,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3804 transitions. [2021-12-06 23:00:28,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:28,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3804 transitions. [2021-12-06 23:00:28,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 90.57142857142857) internal successors, (3804), 42 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:28,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:28,319 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:28,319 INFO L186 Difference]: Start difference. First operand has 335 places, 600 transitions, 9944 flow. Second operand 42 states and 3804 transitions. [2021-12-06 23:00:28,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 953 transitions, 18834 flow [2021-12-06 23:00:29,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 953 transitions, 18192 flow, removed 288 selfloop flow, removed 27 redundant places. [2021-12-06 23:00:29,401 INFO L242 Difference]: Finished difference. Result has 355 places, 796 transitions, 15700 flow [2021-12-06 23:00:29,401 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=9371, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15700, PETRI_PLACES=355, PETRI_TRANSITIONS=796} [2021-12-06 23:00:29,401 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 225 predicate places. [2021-12-06 23:00:29,401 INFO L470 AbstractCegarLoop]: Abstraction has has 355 places, 796 transitions, 15700 flow [2021-12-06 23:00:29,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 88.30188679245283) internal successors, (4680), 53 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:29,402 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:29,402 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:29,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:00:29,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 23:00:29,604 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1402128076, now seen corresponding path program 9 times [2021-12-06 23:00:29,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:29,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745281740] [2021-12-06 23:00:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:29,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:30,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:30,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:30,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745281740] [2021-12-06 23:00:30,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745281740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:30,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67754264] [2021-12-06 23:00:30,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:00:30,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:30,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:30,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:30,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:00:30,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 23:00:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:00:30,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 23:00:30,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 [2021-12-06 23:00:30,174 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:00:30,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:00:30,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 23:00:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-06 23:00:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:00:30,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:30,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_439) c_~q~0.base) (+ c_~q~0.offset (* c_~q_front~0 4))) 0))) is different from false [2021-12-06 23:00:30,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:00:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 45 [2021-12-06 23:00:30,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 18 [2021-12-06 23:00:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:00:30,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67754264] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:30,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12, 12] total 35 [2021-12-06 23:00:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436904304] [2021-12-06 23:00:30,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:30,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 23:00:30,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:30,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 23:00:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1024, Unknown=1, NotChecked=64, Total=1190 [2021-12-06 23:00:30,759 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 145 [2021-12-06 23:00:30,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 796 transitions, 15700 flow. Second operand has 35 states, 35 states have (on average 85.14285714285714) internal successors, (2980), 35 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:30,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:30,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 145 [2021-12-06 23:00:30,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:00:36,220 INFO L129 PetriNetUnfolder]: 4335/14033 cut-off events. [2021-12-06 23:00:36,220 INFO L130 PetriNetUnfolder]: For 445616/453966 co-relation queries the response was YES. [2021-12-06 23:00:36,352 INFO L84 FinitePrefix]: Finished finitePrefix Result has 84253 conditions, 14033 events. 4335/14033 cut-off events. For 445616/453966 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 161969 event pairs, 867 based on Foata normal form. 2047/15399 useless extension candidates. Maximal degree in co-relation 84156. Up to 1971 conditions per place. [2021-12-06 23:00:36,414 INFO L132 encePairwiseOnDemand]: 124/145 looper letters, 550 selfloop transitions, 610 changer transitions 0/1239 dead transitions. [2021-12-06 23:00:36,414 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1239 transitions, 27867 flow [2021-12-06 23:00:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 23:00:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-06 23:00:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3381 transitions. [2021-12-06 23:00:36,418 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5978779840848807 [2021-12-06 23:00:36,418 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3381 transitions. [2021-12-06 23:00:36,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3381 transitions. [2021-12-06 23:00:36,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:00:36,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3381 transitions. [2021-12-06 23:00:36,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 86.6923076923077) internal successors, (3381), 39 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:36,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:36,454 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:36,455 INFO L186 Difference]: Start difference. First operand has 355 places, 796 transitions, 15700 flow. Second operand 39 states and 3381 transitions. [2021-12-06 23:00:36,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1239 transitions, 27867 flow [2021-12-06 23:00:38,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1239 transitions, 27239 flow, removed 270 selfloop flow, removed 31 redundant places. [2021-12-06 23:00:38,308 INFO L242 Difference]: Finished difference. Result has 371 places, 1035 transitions, 23477 flow [2021-12-06 23:00:38,309 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=15228, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=23477, PETRI_PLACES=371, PETRI_TRANSITIONS=1035} [2021-12-06 23:00:38,309 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 241 predicate places. [2021-12-06 23:00:38,309 INFO L470 AbstractCegarLoop]: Abstraction has has 371 places, 1035 transitions, 23477 flow [2021-12-06 23:00:38,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.14285714285714) internal successors, (2980), 35 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:38,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:00:38,310 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:00:38,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 23:00:38,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 23:00:38,511 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:00:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:38,511 INFO L85 PathProgramCache]: Analyzing trace with hash 456223768, now seen corresponding path program 1 times [2021-12-06 23:00:38,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:38,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453579501] [2021-12-06 23:00:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:38,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:39,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453579501] [2021-12-06 23:00:39,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453579501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:00:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687836141] [2021-12-06 23:00:39,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:39,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:00:39,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:00:39,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:00:39,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:00:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 23:00:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:00:40,604 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 23:00:40,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 10 [2021-12-06 23:00:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:00:42,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:00:42,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 43 treesize of output 43 [2021-12-06 23:00:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:43,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687836141] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:00:43,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:00:43,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 30] total 88 [2021-12-06 23:00:43,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493328473] [2021-12-06 23:00:43,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:00:43,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-12-06 23:00:43,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-12-06 23:00:43,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=773, Invalid=6883, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 23:00:43,521 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-06 23:00:43,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1035 transitions, 23477 flow. Second operand has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:00:43,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:00:43,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-06 23:00:43,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:01:11,768 INFO L129 PetriNetUnfolder]: 21894/44530 cut-off events. [2021-12-06 23:01:11,768 INFO L130 PetriNetUnfolder]: For 1375980/1376079 co-relation queries the response was YES. [2021-12-06 23:01:12,476 INFO L84 FinitePrefix]: Finished finitePrefix Result has 306591 conditions, 44530 events. 21894/44530 cut-off events. For 1375980/1376079 co-relation queries the response was YES. Maximal size of possible extension queue 1560. Compared 459066 event pairs, 6057 based on Foata normal form. 78/44532 useless extension candidates. Maximal degree in co-relation 306489. Up to 24553 conditions per place. [2021-12-06 23:01:12,754 INFO L132 encePairwiseOnDemand]: 103/145 looper letters, 639 selfloop transitions, 2307 changer transitions 79/3071 dead transitions. [2021-12-06 23:01:12,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 3071 transitions, 78048 flow [2021-12-06 23:01:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-06 23:01:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-12-06 23:01:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 6601 transitions. [2021-12-06 23:01:12,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4176526415691237 [2021-12-06 23:01:12,761 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 6601 transitions. [2021-12-06 23:01:12,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 6601 transitions. [2021-12-06 23:01:12,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:01:12,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 6601 transitions. [2021-12-06 23:01:12,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 60.559633027522935) internal successors, (6601), 109 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:12,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 145.0) internal successors, (15950), 110 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:12,789 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 145.0) internal successors, (15950), 110 states have internal predecessors, (15950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:12,789 INFO L186 Difference]: Start difference. First operand has 371 places, 1035 transitions, 23477 flow. Second operand 109 states and 6601 transitions. [2021-12-06 23:01:12,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 3071 transitions, 78048 flow [2021-12-06 23:01:25,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 3071 transitions, 76835 flow, removed 544 selfloop flow, removed 26 redundant places. [2021-12-06 23:01:25,578 INFO L242 Difference]: Finished difference. Result has 477 places, 2734 transitions, 72953 flow [2021-12-06 23:01:25,579 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22959, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=829, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=72953, PETRI_PLACES=477, PETRI_TRANSITIONS=2734} [2021-12-06 23:01:25,579 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 347 predicate places. [2021-12-06 23:01:25,579 INFO L470 AbstractCegarLoop]: Abstraction has has 477 places, 2734 transitions, 72953 flow [2021-12-06 23:01:25,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 58.51136363636363) internal successors, (5149), 88 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:25,580 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:01:25,580 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:01:25,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 23:01:25,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 23:01:25,780 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:01:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1747004360, now seen corresponding path program 2 times [2021-12-06 23:01:25,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:25,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561390460] [2021-12-06 23:01:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:25,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:26,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561390460] [2021-12-06 23:01:26,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561390460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708574041] [2021-12-06 23:01:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:01:26,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:26,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:26,922 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:26,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:01:27,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:01:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:01:27,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-06 23:01:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:27,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:01:27,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 23:01:28,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 23:01:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 23:01:28,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 7 [2021-12-06 23:01:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:29,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:33,381 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-12-06 23:01:33,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 129 treesize of output 94 [2021-12-06 23:01:33,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:01:33,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 225 treesize of output 217 [2021-12-06 23:01:33,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:01:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 201 treesize of output 199 [2021-12-06 23:01:33,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:01:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 183 treesize of output 163 [2021-12-06 23:01:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:35,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708574041] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:35,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:35,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 38] total 107 [2021-12-06 23:01:35,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114322186] [2021-12-06 23:01:35,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:35,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 23:01:35,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:35,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 23:01:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=10236, Unknown=71, NotChecked=0, Total=11342 [2021-12-06 23:01:35,522 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 145 [2021-12-06 23:01:35,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 2734 transitions, 72953 flow. Second operand has 107 states, 107 states have (on average 51.177570093457945) internal successors, (5476), 107 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:01:35,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:01:35,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 145 [2021-12-06 23:01:35,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:01:45,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:01:59,762 WARN L227 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 77 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:02:17,468 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 79 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:02:20,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:28,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:02:38,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-06 23:03:45,987 INFO L129 PetriNetUnfolder]: 28561/57768 cut-off events. [2021-12-06 23:03:45,987 INFO L130 PetriNetUnfolder]: For 1839274/1839367 co-relation queries the response was YES. [2021-12-06 23:03:47,191 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442941 conditions, 57768 events. 28561/57768 cut-off events. For 1839274/1839367 co-relation queries the response was YES. Maximal size of possible extension queue 2072. Compared 615708 event pairs, 2035 based on Foata normal form. 84/57706 useless extension candidates. Maximal degree in co-relation 442817. Up to 19380 conditions per place. [2021-12-06 23:03:47,562 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 1218 selfloop transitions, 3640 changer transitions 20/4921 dead transitions. [2021-12-06 23:03:47,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 4921 transitions, 125670 flow [2021-12-06 23:03:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2021-12-06 23:03:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-12-06 23:03:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 8586 transitions. [2021-12-06 23:03:47,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.3820244716351502 [2021-12-06 23:03:47,572 INFO L72 ComplementDD]: Start complementDD. Operand 155 states and 8586 transitions. [2021-12-06 23:03:47,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 155 states and 8586 transitions. [2021-12-06 23:03:47,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:03:47,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 155 states and 8586 transitions. [2021-12-06 23:03:47,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 156 states, 155 states have (on average 55.39354838709677) internal successors, (8586), 155 states have internal predecessors, (8586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:47,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 156 states, 156 states have (on average 145.0) internal successors, (22620), 156 states have internal predecessors, (22620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:47,611 INFO L81 ComplementDD]: Finished complementDD. Result has 156 states, 156 states have (on average 145.0) internal successors, (22620), 156 states have internal predecessors, (22620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:03:47,611 INFO L186 Difference]: Start difference. First operand has 477 places, 2734 transitions, 72953 flow. Second operand 155 states and 8586 transitions. [2021-12-06 23:03:47,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 4921 transitions, 125670 flow [2021-12-06 23:04:13,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 4921 transitions, 123907 flow, removed 852 selfloop flow, removed 30 redundant places. [2021-12-06 23:04:14,105 INFO L242 Difference]: Finished difference. Result has 651 places, 4119 transitions, 118517 flow [2021-12-06 23:04:14,107 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=71784, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=118517, PETRI_PLACES=651, PETRI_TRANSITIONS=4119} [2021-12-06 23:04:14,108 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 521 predicate places. [2021-12-06 23:04:14,108 INFO L470 AbstractCegarLoop]: Abstraction has has 651 places, 4119 transitions, 118517 flow [2021-12-06 23:04:14,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 51.177570093457945) internal successors, (5476), 107 states have internal predecessors, (5476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:14,108 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:04:14,109 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:04:14,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:04:14,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:14,310 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:04:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:14,311 INFO L85 PathProgramCache]: Analyzing trace with hash 800771644, now seen corresponding path program 3 times [2021-12-06 23:04:14,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55291402] [2021-12-06 23:04:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:14,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:15,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55291402] [2021-12-06 23:04:15,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55291402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:15,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817960357] [2021-12-06 23:04:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:04:15,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:04:15,621 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:04:15,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:04:15,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 23:04:15,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:04:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-06 23:04:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:04:16,950 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:04:16,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:04:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:04:17,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:04:18,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:04:18,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 40 [2021-12-06 23:04:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 23:04:20,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817960357] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:04:20,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:04:20,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22, 22] total 71 [2021-12-06 23:04:20,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994008585] [2021-12-06 23:04:20,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:04:20,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-12-06 23:04:20,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-12-06 23:04:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=4637, Unknown=0, NotChecked=0, Total=4970 [2021-12-06 23:04:20,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-06 23:04:20,459 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 4119 transitions, 118517 flow. Second operand has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:04:20,459 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:04:20,459 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-06 23:04:20,459 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:05:40,856 INFO L129 PetriNetUnfolder]: 30821/61937 cut-off events. [2021-12-06 23:05:40,856 INFO L130 PetriNetUnfolder]: For 2799863/2800022 co-relation queries the response was YES. [2021-12-06 23:05:42,789 INFO L84 FinitePrefix]: Finished finitePrefix Result has 600816 conditions, 61937 events. 30821/61937 cut-off events. For 2799863/2800022 co-relation queries the response was YES. Maximal size of possible extension queue 2236. Compared 663545 event pairs, 7339 based on Foata normal form. 88/61841 useless extension candidates. Maximal degree in co-relation 600639. Up to 41229 conditions per place. [2021-12-06 23:05:43,192 INFO L132 encePairwiseOnDemand]: 106/145 looper letters, 2659 selfloop transitions, 2345 changer transitions 17/5067 dead transitions. [2021-12-06 23:05:43,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 5067 transitions, 154107 flow [2021-12-06 23:05:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-06 23:05:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-12-06 23:05:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4192 transitions. [2021-12-06 23:05:43,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41899050474762617 [2021-12-06 23:05:43,196 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4192 transitions. [2021-12-06 23:05:43,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4192 transitions. [2021-12-06 23:05:43,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:05:43,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4192 transitions. [2021-12-06 23:05:43,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 60.7536231884058) internal successors, (4192), 69 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:43,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 145.0) internal successors, (10150), 70 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:43,212 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 145.0) internal successors, (10150), 70 states have internal predecessors, (10150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:05:43,212 INFO L186 Difference]: Start difference. First operand has 651 places, 4119 transitions, 118517 flow. Second operand 69 states and 4192 transitions. [2021-12-06 23:05:43,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 5067 transitions, 154107 flow [2021-12-06 23:06:39,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 5067 transitions, 151230 flow, removed 1317 selfloop flow, removed 33 redundant places. [2021-12-06 23:06:39,136 INFO L242 Difference]: Finished difference. Result has 707 places, 4731 transitions, 143994 flow [2021-12-06 23:06:39,139 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=115944, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=143994, PETRI_PLACES=707, PETRI_TRANSITIONS=4731} [2021-12-06 23:06:39,140 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 577 predicate places. [2021-12-06 23:06:39,140 INFO L470 AbstractCegarLoop]: Abstraction has has 707 places, 4731 transitions, 143994 flow [2021-12-06 23:06:39,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 58.971830985915496) internal successors, (4187), 71 states have internal predecessors, (4187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:39,140 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:06:39,140 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:39,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:06:39,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 23:06:39,342 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:06:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1462775322, now seen corresponding path program 4 times [2021-12-06 23:06:39,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:39,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383430936] [2021-12-06 23:06:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:39,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:40,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383430936] [2021-12-06 23:06:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383430936] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508250630] [2021-12-06 23:06:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:06:40,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:40,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:40,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:06:40,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:06:40,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:06:40,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 23:06:40,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:42,613 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:06:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:06:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:43,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:45,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:06:45,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-12-06 23:06:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:06:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508250630] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:47,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:06:47,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 32, 32] total 92 [2021-12-06 23:06:47,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980739572] [2021-12-06 23:06:47,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:47,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 23:06:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 23:06:47,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=7671, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 23:06:47,419 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-06 23:06:47,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 4731 transitions, 143994 flow. Second operand has 92 states, 92 states have (on average 58.40217391304348) internal successors, (5373), 92 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:06:47,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:06:47,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-06 23:06:47,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:08:30,909 INFO L129 PetriNetUnfolder]: 33381/67416 cut-off events. [2021-12-06 23:08:30,909 INFO L130 PetriNetUnfolder]: For 3304707/3304862 co-relation queries the response was YES. [2021-12-06 23:08:33,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 682537 conditions, 67416 events. 33381/67416 cut-off events. For 3304707/3304862 co-relation queries the response was YES. Maximal size of possible extension queue 2397. Compared 733545 event pairs, 7717 based on Foata normal form. 84/67259 useless extension candidates. Maximal degree in co-relation 682342. Up to 49381 conditions per place. [2021-12-06 23:08:33,854 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 3608 selfloop transitions, 2138 changer transitions 16/5808 dead transitions. [2021-12-06 23:08:33,854 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 772 places, 5808 transitions, 184328 flow [2021-12-06 23:08:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 23:08:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-12-06 23:08:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4426 transitions. [2021-12-06 23:08:33,858 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4239463601532567 [2021-12-06 23:08:33,858 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4426 transitions. [2021-12-06 23:08:33,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4426 transitions. [2021-12-06 23:08:33,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:08:33,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4426 transitions. [2021-12-06 23:08:33,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.47222222222222) internal successors, (4426), 72 states have internal predecessors, (4426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:33,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 145.0) internal successors, (10585), 73 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:33,868 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 145.0) internal successors, (10585), 73 states have internal predecessors, (10585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:08:33,868 INFO L186 Difference]: Start difference. First operand has 707 places, 4731 transitions, 143994 flow. Second operand 72 states and 4426 transitions. [2021-12-06 23:08:33,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 772 places, 5808 transitions, 184328 flow [2021-12-06 23:09:47,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 742 places, 5808 transitions, 183755 flow, removed 252 selfloop flow, removed 30 redundant places. [2021-12-06 23:09:47,957 INFO L242 Difference]: Finished difference. Result has 771 places, 5509 transitions, 176958 flow [2021-12-06 23:09:47,960 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=143532, PETRI_DIFFERENCE_MINUEND_PLACES=671, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=176958, PETRI_PLACES=771, PETRI_TRANSITIONS=5509} [2021-12-06 23:09:47,961 INFO L334 CegarLoopForPetriNet]: 130 programPoint places, 641 predicate places. [2021-12-06 23:09:47,961 INFO L470 AbstractCegarLoop]: Abstraction has has 771 places, 5509 transitions, 176958 flow [2021-12-06 23:09:47,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 58.40217391304348) internal successors, (5373), 92 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:09:47,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-06 23:09:47,962 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:09:47,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:09:48,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 23:09:48,163 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-06 23:09:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:09:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash -324348688, now seen corresponding path program 5 times [2021-12-06 23:09:48,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:09:48,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019928050] [2021-12-06 23:09:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:09:48,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:09:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:09:49,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:09:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019928050] [2021-12-06 23:09:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019928050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:09:49,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714226324] [2021-12-06 23:09:49,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:09:49,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:09:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:09:49,383 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:09:49,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a1791c6-8142-4852-9c41-59c2af64edcd/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:09:49,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-06 23:09:49,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:09:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 23:09:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:09:51,087 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-12-06 23:09:51,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 10 [2021-12-06 23:09:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:09:51,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:09:52,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:09:52,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 40 [2021-12-06 23:09:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:09:55,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714226324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:09:55,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:09:55,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 31, 31] total 89 [2021-12-06 23:09:55,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903166544] [2021-12-06 23:09:55,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:09:55,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-12-06 23:09:55,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:09:55,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-12-06 23:09:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=687, Invalid=7145, Unknown=0, NotChecked=0, Total=7832 [2021-12-06 23:09:55,406 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 145 [2021-12-06 23:09:55,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 5509 transitions, 176958 flow. Second operand has 89 states, 89 states have (on average 58.48314606741573) internal successors, (5205), 89 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:09:55,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-06 23:09:55,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 145 [2021-12-06 23:09:55,408 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-06 23:12:13,530 INFO L129 PetriNetUnfolder]: 35163/71239 cut-off events. [2021-12-06 23:12:13,530 INFO L130 PetriNetUnfolder]: For 4349461/4349827 co-relation queries the response was YES. [2021-12-06 23:12:16,470 INFO L84 FinitePrefix]: Finished finitePrefix Result has 809919 conditions, 71239 events. 35163/71239 cut-off events. For 4349461/4349827 co-relation queries the response was YES. Maximal size of possible extension queue 2516. Compared 776797 event pairs, 7993 based on Foata normal form. 111/71080 useless extension candidates. Maximal degree in co-relation 809701. Up to 51867 conditions per place. [2021-12-06 23:12:17,133 INFO L132 encePairwiseOnDemand]: 104/145 looper letters, 3897 selfloop transitions, 3120 changer transitions 18/7081 dead transitions. [2021-12-06 23:12:17,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 838 places, 7081 transitions, 240145 flow [2021-12-06 23:12:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-06 23:12:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-12-06 23:12:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4502 transitions. [2021-12-06 23:12:17,137 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4195712954333644 [2021-12-06 23:12:17,137 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4502 transitions. [2021-12-06 23:12:17,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4502 transitions. [2021-12-06 23:12:17,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 23:12:17,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4502 transitions. [2021-12-06 23:12:17,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 60.83783783783784) internal successors, (4502), 74 states have internal predecessors, (4502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:12:17,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 145.0) internal successors, (10875), 75 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:12:17,146 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 145.0) internal successors, (10875), 75 states have internal predecessors, (10875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 23:12:17,146 INFO L186 Difference]: Start difference. First operand has 771 places, 5509 transitions, 176958 flow. Second operand 74 states and 4502 transitions. [2021-12-06 23:12:17,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 838 places, 7081 transitions, 240145 flow