./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:03:36,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:03:36,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:03:36,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:03:36,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:03:36,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:03:36,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:03:36,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:03:36,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:03:36,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:03:36,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:03:36,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:03:36,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:03:36,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:03:36,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:03:36,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:03:36,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:03:36,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:03:36,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:03:36,713 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:03:36,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:03:36,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:03:36,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:03:36,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:03:36,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:03:36,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:03:36,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:03:36,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:03:36,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:03:36,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:03:36,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:03:36,734 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:03:36,735 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:03:36,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:03:36,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:03:36,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:03:36,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:03:36,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:03:36,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:03:36,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:03:36,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:03:36,752 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:03:36,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:03:36,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:03:36,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:03:36,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:03:36,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:03:36,810 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:03:36,814 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:03:36,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:03:36,815 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:03:36,815 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:03:36,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:03:36,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:03:36,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:03:36,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:03:36,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:03:36,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:03:36,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:03:36,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:03:36,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:03:36,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:03:36,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:03:36,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:03:36,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:03:36,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:03:36,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:03:36,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:03:36,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:03:36,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:03:36,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:03:36,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:03:36,824 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:03:36,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:03:36,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:03:36,825 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_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-20 11:03:37,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:03:37,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:03:37,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:03:37,295 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:03:37,296 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:03:37,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-20 11:03:41,309 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:03:41,570 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:03:41,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-20 11:03:41,582 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/data/de2765e6a/e439fa2aac03402087f544412879adab/FLAGfc7691be4 [2022-11-20 11:03:41,615 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/data/de2765e6a/e439fa2aac03402087f544412879adab [2022-11-20 11:03:41,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:03:41,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:03:41,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:03:41,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:03:41,637 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:03:41,638 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:41,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ccf91eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41, skipping insertion in model container [2022-11-20 11:03:41,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:41,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:03:41,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:03:41,896 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-20 11:03:41,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:03:41,921 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:03:41,947 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-20 11:03:41,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:03:41,967 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:03:41,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41 WrapperNode [2022-11-20 11:03:41,968 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:03:41,970 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:03:41,970 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:03:41,970 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:03:41,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:41,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,025 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-20 11:03:42,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:03:42,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:03:42,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:03:42,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:03:42,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,054 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:03:42,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:03:42,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:03:42,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:03:42,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (1/1) ... [2022-11-20 11:03:42,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:03:42,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:42,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:03:42,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:03:42,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:03:42,159 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:03:42,159 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:03:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:03:42,160 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:03:42,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:03:42,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:03:42,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:03:42,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:03:42,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:03:42,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:03:42,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:03:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:03:42,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:03:42,168 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:03:42,294 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:03:42,296 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:03:42,579 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:03:42,672 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:03:42,672 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:03:42,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:03:42 BoogieIcfgContainer [2022-11-20 11:03:42,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:03:42,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:03:42,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:03:42,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:03:42,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:03:41" (1/3) ... [2022-11-20 11:03:42,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28980416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:03:42, skipping insertion in model container [2022-11-20 11:03:42,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:03:41" (2/3) ... [2022-11-20 11:03:42,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28980416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:03:42, skipping insertion in model container [2022-11-20 11:03:42,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:03:42" (3/3) ... [2022-11-20 11:03:42,702 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-20 11:03:42,716 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:03:42,733 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:03:42,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:03:42,733 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:03:42,890 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:03:42,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-20 11:03:43,041 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-20 11:03:43,041 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:03:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-20 11:03:43,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-20 11:03:43,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-20 11:03:43,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:03:43,080 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6e69b576, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:03:43,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 11:03:43,116 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-20 11:03:43,117 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:03:43,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:43,118 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:43,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash 737481402, now seen corresponding path program 1 times [2022-11-20 11:03:43,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:43,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914376413] [2022-11-20 11:03:43,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:43,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:43,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914376413] [2022-11-20 11:03:43,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914376413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:03:43,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:03:43,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:03:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707084885] [2022-11-20 11:03:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:43,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:03:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:03:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:03:43,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-11-20 11:03:43,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:43,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:43,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-11-20 11:03:43,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:43,668 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2022-11-20 11:03:43,668 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-20 11:03:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-11-20 11:03:43,671 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-20 11:03:43,672 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-11-20 11:03:43,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:03:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:03:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-20 11:03:43,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-11-20 11:03:43,695 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-20 11:03:43,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-20 11:03:43,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:43,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-20 11:03:43,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:43,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:43,723 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:43,726 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-11-20 11:03:43,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-11-20 11:03:43,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 11:03:43,746 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-20 11:03:43,749 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-20 11:03:43,759 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-20 11:03:43,760 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-20 11:03:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:43,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:43,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:43,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:03:43,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:43,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1997320056, now seen corresponding path program 1 times [2022-11-20 11:03:43,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:43,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955277731] [2022-11-20 11:03:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:43,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:44,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955277731] [2022-11-20 11:03:44,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955277731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:03:44,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:03:44,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:03:44,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556171258] [2022-11-20 11:03:44,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:44,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:03:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:03:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:03:44,553 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-20 11:03:44,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:44,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:44,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-20 11:03:44,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:44,758 INFO L130 PetriNetUnfolder]: 8/111 cut-off events. [2022-11-20 11:03:44,758 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-20 11:03:44,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-11-20 11:03:44,761 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-11-20 11:03:44,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-11-20 11:03:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:03:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 11:03:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-11-20 11:03:44,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-11-20 11:03:44,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-11-20 11:03:44,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-11-20 11:03:44,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:44,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-11-20 11:03:44,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:44,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:44,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:44,776 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-11-20 11:03:44,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-11-20 11:03:44,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:03:44,780 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-11-20 11:03:44,780 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-20 11:03:44,781 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-11-20 11:03:44,782 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-11-20 11:03:44,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:44,782 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:44,783 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:44,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:03:44,783 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:44,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:44,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1767965212, now seen corresponding path program 1 times [2022-11-20 11:03:44,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:44,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211948102] [2022-11-20 11:03:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:44,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:45,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211948102] [2022-11-20 11:03:45,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211948102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:03:45,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:03:45,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:03:45,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680428986] [2022-11-20 11:03:45,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:45,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:03:45,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:45,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:03:45,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:03:45,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-20 11:03:45,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:45,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-20 11:03:45,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:45,532 INFO L130 PetriNetUnfolder]: 76/289 cut-off events. [2022-11-20 11:03:45,533 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-20 11:03:45,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 289 events. 76/289 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1273 event pairs, 32 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 496. Up to 89 conditions per place. [2022-11-20 11:03:45,544 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 28 selfloop transitions, 5 changer transitions 4/91 dead transitions. [2022-11-20 11:03:45,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 91 transitions, 283 flow [2022-11-20 11:03:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:03:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 11:03:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-11-20 11:03:45,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-11-20 11:03:45,554 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-11-20 11:03:45,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-11-20 11:03:45,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:45,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-11-20 11:03:45,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,564 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,565 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 6 states and 429 transitions. [2022-11-20 11:03:45,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 91 transitions, 283 flow [2022-11-20 11:03:45,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 277 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-20 11:03:45,574 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 184 flow [2022-11-20 11:03:45,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2022-11-20 11:03:45,578 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-11-20 11:03:45,578 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 184 flow [2022-11-20 11:03:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:45,579 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:45,580 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:03:45,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash 929170576, now seen corresponding path program 2 times [2022-11-20 11:03:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049347744] [2022-11-20 11:03:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:45,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049347744] [2022-11-20 11:03:45,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049347744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:45,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103785121] [2022-11-20 11:03:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:45,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:45,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:45,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:03:46,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:46,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:46,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:03:46,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:46,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:46,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103785121] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:46,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:03:46,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-20 11:03:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616924406] [2022-11-20 11:03:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:03:46,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:03:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:03:46,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:03:46,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-11-20 11:03:46,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:46,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:46,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-11-20 11:03:46,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:46,414 INFO L130 PetriNetUnfolder]: 53/239 cut-off events. [2022-11-20 11:03:46,414 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2022-11-20 11:03:46,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 239 events. 53/239 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1009 event pairs, 16 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 457. Up to 59 conditions per place. [2022-11-20 11:03:46,417 INFO L137 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 6 changer transitions 4/85 dead transitions. [2022-11-20 11:03:46,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 283 flow [2022-11-20 11:03:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:03:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:03:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-11-20 11:03:46,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-11-20 11:03:46,420 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-11-20 11:03:46,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-11-20 11:03:46,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:46,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-11-20 11:03:46,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:46,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 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) [2022-11-20 11:03:46,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 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) [2022-11-20 11:03:46,424 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 184 flow. Second operand 4 states and 299 transitions. [2022-11-20 11:03:46,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 283 flow [2022-11-20 11:03:46,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 270 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-20 11:03:46,428 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 220 flow [2022-11-20 11:03:46,429 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-11-20 11:03:46,429 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2022-11-20 11:03:46,430 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 220 flow [2022-11-20 11:03:46,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:46,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:46,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:46,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:46,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:46,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1285977232, now seen corresponding path program 3 times [2022-11-20 11:03:46,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:46,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027806462] [2022-11-20 11:03:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:46,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027806462] [2022-11-20 11:03:46,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027806462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891798596] [2022-11-20 11:03:46,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:03:46,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:46,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:47,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:03:47,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 11:03:47,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:47,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:03:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:47,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:47,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891798596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:47,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:47,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-20 11:03:47,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247810317] [2022-11-20 11:03:47,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:47,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:03:47,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:47,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:03:47,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:03:47,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-20 11:03:47,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:47,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:47,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-20 11:03:47,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:47,705 INFO L130 PetriNetUnfolder]: 98/349 cut-off events. [2022-11-20 11:03:47,705 INFO L131 PetriNetUnfolder]: For 295/295 co-relation queries the response was YES. [2022-11-20 11:03:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 349 events. 98/349 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1614 event pairs, 21 based on Foata normal form. 9/353 useless extension candidates. Maximal degree in co-relation 803. Up to 67 conditions per place. [2022-11-20 11:03:47,712 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 17 changer transitions 7/118 dead transitions. [2022-11-20 11:03:47,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 508 flow [2022-11-20 11:03:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:03:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:03:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 582 transitions. [2022-11-20 11:03:47,715 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8362068965517241 [2022-11-20 11:03:47,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 582 transitions. [2022-11-20 11:03:47,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 582 transitions. [2022-11-20 11:03:47,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:47,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 582 transitions. [2022-11-20 11:03:47,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:47,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:47,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:47,723 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 220 flow. Second operand 8 states and 582 transitions. [2022-11-20 11:03:47,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 508 flow [2022-11-20 11:03:47,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:03:47,734 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 350 flow [2022-11-20 11:03:47,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-11-20 11:03:47,738 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-11-20 11:03:47,738 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 350 flow [2022-11-20 11:03:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:47,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:47,740 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:47,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:47,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:47,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:47,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1621783018, now seen corresponding path program 1 times [2022-11-20 11:03:47,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:47,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467421020] [2022-11-20 11:03:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:47,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:48,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:48,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467421020] [2022-11-20 11:03:48,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467421020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:48,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725881158] [2022-11-20 11:03:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:48,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:48,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:03:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:48,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:03:48,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:48,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725881158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:48,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:48,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-11-20 11:03:48,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074128787] [2022-11-20 11:03:48,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:03:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:03:48,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:03:48,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 87 [2022-11-20 11:03:48,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:48,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:48,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 87 [2022-11-20 11:03:48,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:49,246 INFO L130 PetriNetUnfolder]: 77/429 cut-off events. [2022-11-20 11:03:49,246 INFO L131 PetriNetUnfolder]: For 628/647 co-relation queries the response was YES. [2022-11-20 11:03:49,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 429 events. 77/429 cut-off events. For 628/647 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2258 event pairs, 13 based on Foata normal form. 14/431 useless extension candidates. Maximal degree in co-relation 1065. Up to 73 conditions per place. [2022-11-20 11:03:49,254 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 44 selfloop transitions, 10 changer transitions 9/120 dead transitions. [2022-11-20 11:03:49,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 608 flow [2022-11-20 11:03:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:03:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 11:03:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 517 transitions. [2022-11-20 11:03:49,259 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.742816091954023 [2022-11-20 11:03:49,259 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 517 transitions. [2022-11-20 11:03:49,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 517 transitions. [2022-11-20 11:03:49,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:49,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 517 transitions. [2022-11-20 11:03:49,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 64.625) internal successors, (517), 8 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,266 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,266 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 350 flow. Second operand 8 states and 517 transitions. [2022-11-20 11:03:49,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 608 flow [2022-11-20 11:03:49,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 120 transitions, 561 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-20 11:03:49,279 INFO L231 Difference]: Finished difference. Result has 102 places, 91 transitions, 371 flow [2022-11-20 11:03:49,280 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=102, PETRI_TRANSITIONS=91} [2022-11-20 11:03:49,283 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-11-20 11:03:49,283 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 91 transitions, 371 flow [2022-11-20 11:03:49,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:49,284 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:49,285 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:49,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:49,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:03:49,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1614141052, now seen corresponding path program 2 times [2022-11-20 11:03:49,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514143386] [2022-11-20 11:03:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:49,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:49,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514143386] [2022-11-20 11:03:49,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514143386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:49,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203345241] [2022-11-20 11:03:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:03:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:49,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:49,858 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:49,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:03:50,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:03:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:03:50,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:50,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:50,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203345241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:50,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:50,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-20 11:03:50,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178734086] [2022-11-20 11:03:50,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:50,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:03:50,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:50,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:03:50,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:03:50,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:03:50,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 91 transitions, 371 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:50,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:50,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:03:50,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:52,875 INFO L130 PetriNetUnfolder]: 438/1183 cut-off events. [2022-11-20 11:03:52,875 INFO L131 PetriNetUnfolder]: For 1752/1776 co-relation queries the response was YES. [2022-11-20 11:03:52,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3509 conditions, 1183 events. 438/1183 cut-off events. For 1752/1776 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7396 event pairs, 23 based on Foata normal form. 21/1196 useless extension candidates. Maximal degree in co-relation 3493. Up to 139 conditions per place. [2022-11-20 11:03:52,891 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 125 selfloop transitions, 134 changer transitions 9/322 dead transitions. [2022-11-20 11:03:52,891 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 322 transitions, 2215 flow [2022-11-20 11:03:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-20 11:03:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-20 11:03:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3177 transitions. [2022-11-20 11:03:52,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.776962582538518 [2022-11-20 11:03:52,902 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3177 transitions. [2022-11-20 11:03:52,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3177 transitions. [2022-11-20 11:03:52,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:52,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3177 transitions. [2022-11-20 11:03:52,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.59574468085107) internal successors, (3177), 47 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:52,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:52,930 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:52,930 INFO L175 Difference]: Start difference. First operand has 102 places, 91 transitions, 371 flow. Second operand 47 states and 3177 transitions. [2022-11-20 11:03:52,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 322 transitions, 2215 flow [2022-11-20 11:03:52,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 322 transitions, 2173 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-20 11:03:52,948 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 1625 flow [2022-11-20 11:03:52,948 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1625, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2022-11-20 11:03:52,950 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 88 predicate places. [2022-11-20 11:03:52,950 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 1625 flow [2022-11-20 11:03:52,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:52,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:52,951 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:52,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:03:53,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:53,158 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:53,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1524011940, now seen corresponding path program 3 times [2022-11-20 11:03:53,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:53,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36573462] [2022-11-20 11:03:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:53,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:53,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36573462] [2022-11-20 11:03:53,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36573462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476912970] [2022-11-20 11:03:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:03:53,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:53,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:53,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:03:53,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:03:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:03:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:53,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476912970] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:54,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:54,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-20 11:03:54,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411041256] [2022-11-20 11:03:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:03:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:54,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:03:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:03:54,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:03:54,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 1625 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:54,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:54,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:03:54,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:03:55,652 INFO L130 PetriNetUnfolder]: 514/1456 cut-off events. [2022-11-20 11:03:55,652 INFO L131 PetriNetUnfolder]: For 6487/6504 co-relation queries the response was YES. [2022-11-20 11:03:55,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6053 conditions, 1456 events. 514/1456 cut-off events. For 6487/6504 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9887 event pairs, 49 based on Foata normal form. 13/1458 useless extension candidates. Maximal degree in co-relation 6015. Up to 278 conditions per place. [2022-11-20 11:03:55,675 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 191 selfloop transitions, 97 changer transitions 22/364 dead transitions. [2022-11-20 11:03:55,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 364 transitions, 3487 flow [2022-11-20 11:03:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:03:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-20 11:03:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1494 transitions. [2022-11-20 11:03:55,682 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.780564263322884 [2022-11-20 11:03:55,682 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1494 transitions. [2022-11-20 11:03:55,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1494 transitions. [2022-11-20 11:03:55,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:03:55,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1494 transitions. [2022-11-20 11:03:55,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.9090909090909) internal successors, (1494), 22 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:55,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 87.0) internal successors, (2001), 23 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:55,701 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 87.0) internal successors, (2001), 23 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:55,702 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 1625 flow. Second operand 22 states and 1494 transitions. [2022-11-20 11:03:55,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 364 transitions, 3487 flow [2022-11-20 11:03:55,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 364 transitions, 3267 flow, removed 54 selfloop flow, removed 3 redundant places. [2022-11-20 11:03:55,769 INFO L231 Difference]: Finished difference. Result has 195 places, 264 transitions, 2159 flow [2022-11-20 11:03:55,769 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2159, PETRI_PLACES=195, PETRI_TRANSITIONS=264} [2022-11-20 11:03:55,773 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 118 predicate places. [2022-11-20 11:03:55,773 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 264 transitions, 2159 flow [2022-11-20 11:03:55,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:55,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:03:55,774 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:03:55,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:03:55,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:55,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:03:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:03:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash -941164102, now seen corresponding path program 4 times [2022-11-20 11:03:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:03:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133275697] [2022-11-20 11:03:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:03:55,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:03:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:03:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:03:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133275697] [2022-11-20 11:03:56,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133275697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:03:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766052660] [2022-11-20 11:03:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:03:56,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:03:56,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:03:56,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:03:56,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:03:56,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:03:56,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:03:56,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:03:56,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:03:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:56,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:03:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:03:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766052660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:03:56,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:03:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-20 11:03:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509302696] [2022-11-20 11:03:56,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:03:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:03:56,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:03:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:03:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:03:56,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:03:56,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 264 transitions, 2159 flow. Second operand has 20 states, 20 states have (on average 65.65) internal successors, (1313), 20 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:03:56,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:03:56,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:03:56,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:03,323 INFO L130 PetriNetUnfolder]: 1012/2888 cut-off events. [2022-11-20 11:04:03,323 INFO L131 PetriNetUnfolder]: For 17866/17877 co-relation queries the response was YES. [2022-11-20 11:04:03,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12357 conditions, 2888 events. 1012/2888 cut-off events. For 17866/17877 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24065 event pairs, 16 based on Foata normal form. 30/2906 useless extension candidates. Maximal degree in co-relation 12306. Up to 294 conditions per place. [2022-11-20 11:04:03,374 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 218 selfloop transitions, 442 changer transitions 39/753 dead transitions. [2022-11-20 11:04:03,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 753 transitions, 8023 flow [2022-11-20 11:04:03,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-20 11:04:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-11-20 11:04:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 7571 transitions. [2022-11-20 11:04:03,408 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7701149425287356 [2022-11-20 11:04:03,408 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 7571 transitions. [2022-11-20 11:04:03,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 7571 transitions. [2022-11-20 11:04:03,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:03,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 7571 transitions. [2022-11-20 11:04:03,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 67.0) internal successors, (7571), 113 states have internal predecessors, (7571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:03,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 87.0) internal successors, (9918), 114 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:03,481 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 87.0) internal successors, (9918), 114 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:03,481 INFO L175 Difference]: Start difference. First operand has 195 places, 264 transitions, 2159 flow. Second operand 113 states and 7571 transitions. [2022-11-20 11:04:03,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 753 transitions, 8023 flow [2022-11-20 11:04:03,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 753 transitions, 7798 flow, removed 105 selfloop flow, removed 5 redundant places. [2022-11-20 11:04:03,866 INFO L231 Difference]: Finished difference. Result has 339 places, 557 transitions, 6207 flow [2022-11-20 11:04:03,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=6207, PETRI_PLACES=339, PETRI_TRANSITIONS=557} [2022-11-20 11:04:03,868 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 262 predicate places. [2022-11-20 11:04:03,869 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 557 transitions, 6207 flow [2022-11-20 11:04:03,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.65) internal successors, (1313), 20 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:03,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:03,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:03,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 11:04:04,080 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:04:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash -768640732, now seen corresponding path program 5 times [2022-11-20 11:04:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:04,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165417819] [2022-11-20 11:04:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165417819] [2022-11-20 11:04:04,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165417819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:04,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567210845] [2022-11-20 11:04:04,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:04:04,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:04,462 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:04:04,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:04,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:04,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:04:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:04,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:05,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567210845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:05,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:05,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-20 11:04:05,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3978688] [2022-11-20 11:04:05,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:05,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:04:05,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:05,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:04:05,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:04:05,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:04:05,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 557 transitions, 6207 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:05,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:05,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:04:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:12,141 INFO L130 PetriNetUnfolder]: 1690/5060 cut-off events. [2022-11-20 11:04:12,141 INFO L131 PetriNetUnfolder]: For 100098/100112 co-relation queries the response was YES. [2022-11-20 11:04:12,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29152 conditions, 5060 events. 1690/5060 cut-off events. For 100098/100112 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49411 event pairs, 118 based on Foata normal form. 34/5034 useless extension candidates. Maximal degree in co-relation 29062. Up to 528 conditions per place. [2022-11-20 11:04:12,237 INFO L137 encePairwiseOnDemand]: 72/87 looper letters, 263 selfloop transitions, 789 changer transitions 18/1124 dead transitions. [2022-11-20 11:04:12,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1124 transitions, 15310 flow [2022-11-20 11:04:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 11:04:12,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-20 11:04:12,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4173 transitions. [2022-11-20 11:04:12,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7736373748609566 [2022-11-20 11:04:12,266 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4173 transitions. [2022-11-20 11:04:12,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4173 transitions. [2022-11-20 11:04:12,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:12,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4173 transitions. [2022-11-20 11:04:12,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.30645161290323) internal successors, (4173), 62 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,323 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:12,323 INFO L175 Difference]: Start difference. First operand has 339 places, 557 transitions, 6207 flow. Second operand 62 states and 4173 transitions. [2022-11-20 11:04:12,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1124 transitions, 15310 flow [2022-11-20 11:04:13,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1124 transitions, 13695 flow, removed 754 selfloop flow, removed 7 redundant places. [2022-11-20 11:04:13,062 INFO L231 Difference]: Finished difference. Result has 404 places, 973 transitions, 12639 flow [2022-11-20 11:04:13,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=12639, PETRI_PLACES=404, PETRI_TRANSITIONS=973} [2022-11-20 11:04:13,064 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 327 predicate places. [2022-11-20 11:04:13,064 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 973 transitions, 12639 flow [2022-11-20 11:04:13,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:13,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:13,066 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:13,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:13,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:13,273 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:04:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash 894328634, now seen corresponding path program 6 times [2022-11-20 11:04:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:13,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086695156] [2022-11-20 11:04:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:13,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:13,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:13,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:13,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086695156] [2022-11-20 11:04:13,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086695156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:13,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013294690] [2022-11-20 11:04:13,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 11:04:13,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:13,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:13,612 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:13,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:04:13,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-20 11:04:13,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:04:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:13,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:14,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013294690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:14,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:14,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:04:14,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424399802] [2022-11-20 11:04:14,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:14,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:04:14,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:14,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:04:14,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:04:14,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:04:14,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 973 transitions, 12639 flow. Second operand has 19 states, 19 states have (on average 65.94736842105263) internal successors, (1253), 19 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:14,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:14,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:04:14,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:20,786 INFO L130 PetriNetUnfolder]: 2237/6436 cut-off events. [2022-11-20 11:04:20,786 INFO L131 PetriNetUnfolder]: For 117830/117848 co-relation queries the response was YES. [2022-11-20 11:04:20,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38470 conditions, 6436 events. 2237/6436 cut-off events. For 117830/117848 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 65279 event pairs, 84 based on Foata normal form. 38/6439 useless extension candidates. Maximal degree in co-relation 38368. Up to 705 conditions per place. [2022-11-20 11:04:20,912 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 264 selfloop transitions, 1174 changer transitions 16/1508 dead transitions. [2022-11-20 11:04:20,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1508 transitions, 22538 flow [2022-11-20 11:04:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 11:04:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-20 11:04:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5274 transitions. [2022-11-20 11:04:20,922 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7673505019642077 [2022-11-20 11:04:20,923 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5274 transitions. [2022-11-20 11:04:20,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5274 transitions. [2022-11-20 11:04:20,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:20,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5274 transitions. [2022-11-20 11:04:20,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.75949367088607) internal successors, (5274), 79 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:20,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:20,955 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:20,955 INFO L175 Difference]: Start difference. First operand has 404 places, 973 transitions, 12639 flow. Second operand 79 states and 5274 transitions. [2022-11-20 11:04:20,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1508 transitions, 22538 flow [2022-11-20 11:04:22,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1508 transitions, 21518 flow, removed 441 selfloop flow, removed 11 redundant places. [2022-11-20 11:04:22,521 INFO L231 Difference]: Finished difference. Result has 504 places, 1405 transitions, 21611 flow [2022-11-20 11:04:22,522 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=11956, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=21611, PETRI_PLACES=504, PETRI_TRANSITIONS=1405} [2022-11-20 11:04:22,523 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 427 predicate places. [2022-11-20 11:04:22,523 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1405 transitions, 21611 flow [2022-11-20 11:04:22,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.94736842105263) internal successors, (1253), 19 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:22,524 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:22,525 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:22,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:22,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:22,733 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:04:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash -889065066, now seen corresponding path program 7 times [2022-11-20 11:04:22,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:22,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302836165] [2022-11-20 11:04:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:22,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:23,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302836165] [2022-11-20 11:04:23,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302836165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:23,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407790025] [2022-11-20 11:04:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 11:04:23,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:23,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:23,103 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:23,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:04:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:04:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:23,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:23,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407790025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:23,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:23,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:04:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898893118] [2022-11-20 11:04:23,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:04:23,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:04:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:04:23,582 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:04:23,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1405 transitions, 21611 flow. Second operand has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:23,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:23,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:04:23,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:30,833 INFO L130 PetriNetUnfolder]: 2355/6884 cut-off events. [2022-11-20 11:04:30,833 INFO L131 PetriNetUnfolder]: For 113642/113662 co-relation queries the response was YES. [2022-11-20 11:04:30,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43543 conditions, 6884 events. 2355/6884 cut-off events. For 113642/113662 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 71402 event pairs, 109 based on Foata normal form. 17/6816 useless extension candidates. Maximal degree in co-relation 43413. Up to 840 conditions per place. [2022-11-20 11:04:30,987 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 477 selfloop transitions, 1125 changer transitions 41/1697 dead transitions. [2022-11-20 11:04:30,988 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 1697 transitions, 29281 flow [2022-11-20 11:04:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 11:04:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-20 11:04:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4643 transitions. [2022-11-20 11:04:31,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7734466100283192 [2022-11-20 11:04:31,000 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4643 transitions. [2022-11-20 11:04:31,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4643 transitions. [2022-11-20 11:04:31,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:31,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4643 transitions. [2022-11-20 11:04:31,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 67.28985507246377) internal successors, (4643), 69 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:31,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 87.0) internal successors, (6090), 70 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:31,033 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 87.0) internal successors, (6090), 70 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:31,033 INFO L175 Difference]: Start difference. First operand has 504 places, 1405 transitions, 21611 flow. Second operand 69 states and 4643 transitions. [2022-11-20 11:04:31,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 1697 transitions, 29281 flow [2022-11-20 11:04:32,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1697 transitions, 28971 flow, removed 80 selfloop flow, removed 15 redundant places. [2022-11-20 11:04:32,633 INFO L231 Difference]: Finished difference. Result has 572 places, 1540 transitions, 26980 flow [2022-11-20 11:04:32,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21148, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=975, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=26980, PETRI_PLACES=572, PETRI_TRANSITIONS=1540} [2022-11-20 11:04:32,635 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 495 predicate places. [2022-11-20 11:04:32,635 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1540 transitions, 26980 flow [2022-11-20 11:04:32,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:32,636 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:32,637 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:32,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:32,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:04:32,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash -522049182, now seen corresponding path program 8 times [2022-11-20 11:04:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:32,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233862254] [2022-11-20 11:04:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233862254] [2022-11-20 11:04:33,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233862254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:33,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602962946] [2022-11-20 11:04:33,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:04:33,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:33,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:33,245 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:33,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:04:33,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:04:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:33,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:04:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:33,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602962946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:33,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:33,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-20 11:04:33,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817295319] [2022-11-20 11:04:33,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:33,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 11:04:33,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 11:04:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-20 11:04:33,857 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:04:33,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1540 transitions, 26980 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:33,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:33,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:04:33,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:04:45,029 INFO L130 PetriNetUnfolder]: 3422/9442 cut-off events. [2022-11-20 11:04:45,030 INFO L131 PetriNetUnfolder]: For 211925/211950 co-relation queries the response was YES. [2022-11-20 11:04:45,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69848 conditions, 9442 events. 3422/9442 cut-off events. For 211925/211950 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 99917 event pairs, 358 based on Foata normal form. 42/9368 useless extension candidates. Maximal degree in co-relation 69705. Up to 1497 conditions per place. [2022-11-20 11:04:45,413 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 811 selfloop transitions, 1554 changer transitions 0/2419 dead transitions. [2022-11-20 11:04:45,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 2419 transitions, 46845 flow [2022-11-20 11:04:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 11:04:45,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-20 11:04:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-11-20 11:04:45,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-11-20 11:04:45,428 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-11-20 11:04:45,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-11-20 11:04:45,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:04:45,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-11-20 11:04:45,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:45,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:45,457 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:45,457 INFO L175 Difference]: Start difference. First operand has 572 places, 1540 transitions, 26980 flow. Second operand 74 states and 4991 transitions. [2022-11-20 11:04:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 2419 transitions, 46845 flow [2022-11-20 11:04:48,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2419 transitions, 45577 flow, removed 226 selfloop flow, removed 29 redundant places. [2022-11-20 11:04:48,850 INFO L231 Difference]: Finished difference. Result has 638 places, 2188 transitions, 43491 flow [2022-11-20 11:04:48,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=26180, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=956, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=43491, PETRI_PLACES=638, PETRI_TRANSITIONS=2188} [2022-11-20 11:04:48,852 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 561 predicate places. [2022-11-20 11:04:48,852 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 2188 transitions, 43491 flow [2022-11-20 11:04:48,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:48,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:48,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:04:48,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:04:49,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:49,061 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:04:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash 729574440, now seen corresponding path program 9 times [2022-11-20 11:04:49,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:49,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105448631] [2022-11-20 11:04:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:49,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:04:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:04:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:49,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:04:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105448631] [2022-11-20 11:04:49,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105448631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:04:49,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572121949] [2022-11-20 11:04:49,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:04:49,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:04:49,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:49,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:04:49,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:04:49,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 11:04:49,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:04:49,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:04:49,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:04:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:49,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:04:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:04:50,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572121949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:04:50,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:04:50,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:04:50,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471529430] [2022-11-20 11:04:50,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:04:50,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:04:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:04:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:04:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:04:50,095 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:04:50,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2188 transitions, 43491 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:04:50,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:04:50,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:04:50,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:07,775 INFO L130 PetriNetUnfolder]: 4688/12581 cut-off events. [2022-11-20 11:05:07,776 INFO L131 PetriNetUnfolder]: For 406550/406582 co-relation queries the response was YES. [2022-11-20 11:05:08,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105516 conditions, 12581 events. 4688/12581 cut-off events. For 406550/406582 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 136935 event pairs, 331 based on Foata normal form. 40/12480 useless extension candidates. Maximal degree in co-relation 105348. Up to 1572 conditions per place. [2022-11-20 11:05:08,287 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 656 selfloop transitions, 2405 changer transitions 4/3119 dead transitions. [2022-11-20 11:05:08,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 3119 transitions, 68517 flow [2022-11-20 11:05:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-20 11:05:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-20 11:05:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-11-20 11:05:08,300 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-11-20 11:05:08,301 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-11-20 11:05:08,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-11-20 11:05:08,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:08,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-11-20 11:05:08,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,337 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:08,338 INFO L175 Difference]: Start difference. First operand has 638 places, 2188 transitions, 43491 flow. Second operand 83 states and 5585 transitions. [2022-11-20 11:05:08,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 3119 transitions, 68517 flow [2022-11-20 11:05:16,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 3119 transitions, 67811 flow, removed 290 selfloop flow, removed 7 redundant places. [2022-11-20 11:05:16,835 INFO L231 Difference]: Finished difference. Result has 738 places, 2892 transitions, 66112 flow [2022-11-20 11:05:16,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=43078, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=66112, PETRI_PLACES=738, PETRI_TRANSITIONS=2892} [2022-11-20 11:05:16,839 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 661 predicate places. [2022-11-20 11:05:16,839 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2892 transitions, 66112 flow [2022-11-20 11:05:16,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:16,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:16,840 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:16,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:17,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 11:05:17,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:05:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -997640146, now seen corresponding path program 10 times [2022-11-20 11:05:17,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:17,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302908918] [2022-11-20 11:05:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:17,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302908918] [2022-11-20 11:05:17,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302908918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:17,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168419262] [2022-11-20 11:05:17,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:05:17,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:17,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:17,394 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:17,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:05:17,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:05:17,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:05:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 11:05:17,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:17,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:17,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168419262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:17,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-20 11:05:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731923903] [2022-11-20 11:05:17,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:05:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:05:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:05:17,931 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:05:17,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2892 transitions, 66112 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:17,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:05:17,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:46,625 INFO L130 PetriNetUnfolder]: 6374/17199 cut-off events. [2022-11-20 11:05:46,625 INFO L131 PetriNetUnfolder]: For 698681/698731 co-relation queries the response was YES. [2022-11-20 11:05:47,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156909 conditions, 17199 events. 6374/17199 cut-off events. For 698681/698731 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 197336 event pairs, 418 based on Foata normal form. 55/17086 useless extension candidates. Maximal degree in co-relation 156717. Up to 2081 conditions per place. [2022-11-20 11:05:47,137 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 698 selfloop transitions, 3558 changer transitions 2/4312 dead transitions. [2022-11-20 11:05:47,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 4312 transitions, 106891 flow [2022-11-20 11:05:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-20 11:05:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-11-20 11:05:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-11-20 11:05:47,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-11-20 11:05:47,150 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-11-20 11:05:47,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-11-20 11:05:47,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:47,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-11-20 11:05:47,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:47,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:47,190 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:47,191 INFO L175 Difference]: Start difference. First operand has 738 places, 2892 transitions, 66112 flow. Second operand 130 states and 8664 transitions. [2022-11-20 11:05:47,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 4312 transitions, 106891 flow [2022-11-20 11:06:03,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 4312 transitions, 106177 flow, removed 295 selfloop flow, removed 15 redundant places. [2022-11-20 11:06:03,909 INFO L231 Difference]: Finished difference. Result has 893 places, 4079 transitions, 105538 flow [2022-11-20 11:06:03,911 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=65534, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=105538, PETRI_PLACES=893, PETRI_TRANSITIONS=4079} [2022-11-20 11:06:03,912 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 816 predicate places. [2022-11-20 11:06:03,912 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 4079 transitions, 105538 flow [2022-11-20 11:06:03,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:03,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:06:03,913 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:06:03,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:06:04,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 11:06:04,118 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 11:06:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:06:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1040374314, now seen corresponding path program 11 times [2022-11-20 11:06:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:06:04,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146926244] [2022-11-20 11:06:04,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:06:04,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:06:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:06:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:04,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:06:04,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146926244] [2022-11-20 11:06:04,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146926244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:06:04,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260061488] [2022-11-20 11:06:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 11:06:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:06:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:06:04,366 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:06:04,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51990253-7926-4d63-8d15-997c33c43620/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:06:04,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:06:04,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:06:04,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 11:06:04,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:06:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:04,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:06:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:06:04,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260061488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:06:04,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:06:04,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-20 11:06:04,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622943584] [2022-11-20 11:06:04,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:06:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 11:06:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:06:04,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 11:06:04,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:06:04,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-20 11:06:04,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 4079 transitions, 105538 flow. Second operand has 21 states, 21 states have (on average 65.19047619047619) internal successors, (1369), 21 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:06:04,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:06:04,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-20 11:06:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand