./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:11:07,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:11:07,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:11:07,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:11:07,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:11:07,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:11:07,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:11:07,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:11:07,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:11:07,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:11:07,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:11:07,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:11:07,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:11:07,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:11:07,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:11:07,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:11:07,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:11:07,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:11:07,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:11:07,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:11:07,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:11:07,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:11:07,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:11:07,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:11:07,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:11:07,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:11:07,974 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:11:07,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:11:07,976 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:11:07,977 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:11:07,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:11:07,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:11:07,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:11:07,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:11:07,982 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:11:07,982 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:11:07,983 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:11:07,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:11:07,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:11:07,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:11:07,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:11:07,990 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:11:08,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:11:08,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:11:08,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:11:08,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:11:08,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:11:08,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:11:08,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:11:08,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:11:08,030 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:11:08,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:11:08,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:11:08,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:11:08,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:11:08,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:11:08,032 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:11:08,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:11:08,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:11:08,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:11:08,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:11:08,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:11:08,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:11:08,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:11:08,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:11:08,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:11:08,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:11:08,034 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:11:08,034 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:11:08,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:11:08,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:11:08,034 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_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2021-11-20 06:11:08,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:11:08,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:11:08,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:11:08,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:11:08,359 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:11:08,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-11-20 06:11:08,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/data/f733d3b22/5f80871df0944da39dd097c71e856762/FLAG2ff0ae36a [2021-11-20 06:11:08,958 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:11:08,959 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-11-20 06:11:08,966 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/data/f733d3b22/5f80871df0944da39dd097c71e856762/FLAG2ff0ae36a [2021-11-20 06:11:09,295 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/data/f733d3b22/5f80871df0944da39dd097c71e856762 [2021-11-20 06:11:09,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:11:09,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:11:09,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:11:09,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:11:09,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:11:09,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c033ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09, skipping insertion in model container [2021-11-20 06:11:09,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:11:09,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:11:09,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2021-11-20 06:11:09,553 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:11:09,561 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:11:09,585 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c[2947,2960] [2021-11-20 06:11:09,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:11:09,603 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:11:09,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09 WrapperNode [2021-11-20 06:11:09,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:11:09,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:11:09,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:11:09,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:11:09,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,650 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2021-11-20 06:11:09,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:11:09,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:11:09,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:11:09,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:11:09,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:11:09,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:11:09,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:11:09,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:11:09,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (1/1) ... [2021-11-20 06:11:09,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:11:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:09,751 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:11:09,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:11:09,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:11:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-20 06:11:09,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-20 06:11:09,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-20 06:11:09,803 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-20 06:11:09,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:11:09,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:11:09,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:11:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-20 06:11:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-20 06:11:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:11:09,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:11:09,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:11:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:11:09,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:11:09,807 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:11:09,909 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:11:09,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:11:10,281 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:11:10,359 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:11:10,359 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:11:10,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:11:10 BoogieIcfgContainer [2021-11-20 06:11:10,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:11:10,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:11:10,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:11:10,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:11:10,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:11:09" (1/3) ... [2021-11-20 06:11:10,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d62de85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:11:10, skipping insertion in model container [2021-11-20 06:11:10,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:11:09" (2/3) ... [2021-11-20 06:11:10,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d62de85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:11:10, skipping insertion in model container [2021-11-20 06:11:10,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:11:10" (3/3) ... [2021-11-20 06:11:10,371 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2021-11-20 06:11:10,376 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:11:10,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:11:10,377 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:11:10,377 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:11:10,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,413 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,414 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,415 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,416 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,416 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,417 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,418 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,419 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,423 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,423 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,427 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,428 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,437 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,438 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,439 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,440 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,443 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,444 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,445 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,446 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,446 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,447 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,449 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,454 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,454 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,454 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,454 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,454 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,455 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,456 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:11:10,458 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:11:10,514 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:11:10,521 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:11:10,521 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 06:11:10,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2021-11-20 06:11:10,618 INFO L129 PetriNetUnfolder]: 11/140 cut-off events. [2021-11-20 06:11:10,618 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:11:10,622 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2021-11-20 06:11:10,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2021-11-20 06:11:10,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2021-11-20 06:11:10,682 INFO L129 PetriNetUnfolder]: 11/130 cut-off events. [2021-11-20 06:11:10,682 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-20 06:11:10,683 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:10,683 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:10,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:10,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1559977782, now seen corresponding path program 1 times [2021-11-20 06:11:10,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:10,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414131113] [2021-11-20 06:11:10,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:10,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:10,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:10,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414131113] [2021-11-20 06:11:10,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414131113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:10,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:10,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:11:10,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347769735] [2021-11-20 06:11:10,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:10,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:11:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:10,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:11:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:11:10,946 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2021-11-20 06:11:10,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:10,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:10,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2021-11-20 06:11:10,953 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:11,018 INFO L129 PetriNetUnfolder]: 11/144 cut-off events. [2021-11-20 06:11:11,018 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-11-20 06:11:11,020 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 144 events. 11/144 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 4 based on Foata normal form. 18/152 useless extension candidates. Maximal degree in co-relation 95. Up to 21 conditions per place. [2021-11-20 06:11:11,022 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 9 selfloop transitions, 0 changer transitions 3/124 dead transitions. [2021-11-20 06:11:11,022 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 278 flow [2021-11-20 06:11:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:11:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:11:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2021-11-20 06:11:11,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9366197183098591 [2021-11-20 06:11:11,039 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2021-11-20 06:11:11,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2021-11-20 06:11:11,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:11,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2021-11-20 06:11:11,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,056 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,058 INFO L186 Difference]: Start difference. First operand has 127 places, 131 transitions, 274 flow. Second operand 2 states and 266 transitions. [2021-11-20 06:11:11,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 278 flow [2021-11-20 06:11:11,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-20 06:11:11,070 INFO L242 Difference]: Finished difference. Result has 124 places, 121 transitions, 246 flow [2021-11-20 06:11:11,073 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2021-11-20 06:11:11,077 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, -3 predicate places. [2021-11-20 06:11:11,077 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 246 flow [2021-11-20 06:11:11,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,078 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:11,079 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:11,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:11:11,079 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:11,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1317567152, now seen corresponding path program 1 times [2021-11-20 06:11:11,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:11,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472661968] [2021-11-20 06:11:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:11,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:11,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:11,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472661968] [2021-11-20 06:11:11,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472661968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:11,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:11,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:11,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361600804] [2021-11-20 06:11:11,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:11,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:11,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:11,372 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2021-11-20 06:11:11,374 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,374 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:11,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2021-11-20 06:11:11,374 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:11,546 INFO L129 PetriNetUnfolder]: 27/291 cut-off events. [2021-11-20 06:11:11,546 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-11-20 06:11:11,552 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 291 events. 27/291 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1037 event pairs, 4 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 359. Up to 34 conditions per place. [2021-11-20 06:11:11,555 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 29 selfloop transitions, 2 changer transitions 4/133 dead transitions. [2021-11-20 06:11:11,555 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 133 transitions, 343 flow [2021-11-20 06:11:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:11:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2021-11-20 06:11:11,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8112676056338028 [2021-11-20 06:11:11,566 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2021-11-20 06:11:11,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2021-11-20 06:11:11,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:11,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2021-11-20 06:11:11,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,580 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,580 INFO L186 Difference]: Start difference. First operand has 124 places, 121 transitions, 246 flow. Second operand 5 states and 576 transitions. [2021-11-20 06:11:11,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 133 transitions, 343 flow [2021-11-20 06:11:11,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:11:11,586 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 262 flow [2021-11-20 06:11:11,587 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2021-11-20 06:11:11,588 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-11-20 06:11:11,588 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 262 flow [2021-11-20 06:11:11,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,589 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:11,589 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:11,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:11:11,590 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:11,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:11,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1193186558, now seen corresponding path program 1 times [2021-11-20 06:11:11,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:11,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078517779] [2021-11-20 06:11:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:11,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:11,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:11,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078517779] [2021-11-20 06:11:11,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078517779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:11,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:11,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:11:11,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621338779] [2021-11-20 06:11:11,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:11,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:11,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:11,844 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-11-20 06:11:11,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:11,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:11,846 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-11-20 06:11:11,846 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:12,048 INFO L129 PetriNetUnfolder]: 105/445 cut-off events. [2021-11-20 06:11:12,049 INFO L130 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2021-11-20 06:11:12,051 INFO L84 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 445 events. 105/445 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1678 event pairs, 46 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 659. Up to 163 conditions per place. [2021-11-20 06:11:12,054 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 27 selfloop transitions, 6 changer transitions 3/137 dead transitions. [2021-11-20 06:11:12,054 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 367 flow [2021-11-20 06:11:12,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:11:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2021-11-20 06:11:12,058 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8609154929577465 [2021-11-20 06:11:12,058 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2021-11-20 06:11:12,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2021-11-20 06:11:12,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:12,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2021-11-20 06:11:12,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,064 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,064 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 262 flow. Second operand 4 states and 489 transitions. [2021-11-20 06:11:12,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 367 flow [2021-11-20 06:11:12,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 137 transitions, 361 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 06:11:12,072 INFO L242 Difference]: Finished difference. Result has 128 places, 127 transitions, 293 flow [2021-11-20 06:11:12,072 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2021-11-20 06:11:12,073 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-11-20 06:11:12,074 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 293 flow [2021-11-20 06:11:12,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,074 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:12,075 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:12,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:11:12,075 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:12,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:12,076 INFO L85 PathProgramCache]: Analyzing trace with hash -152225810, now seen corresponding path program 1 times [2021-11-20 06:11:12,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:12,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237736342] [2021-11-20 06:11:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:12,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:12,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:12,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:12,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237736342] [2021-11-20 06:11:12,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237736342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:12,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:12,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:11:12,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474870397] [2021-11-20 06:11:12,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:12,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:11:12,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:12,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:11:12,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:11:12,304 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-11-20 06:11:12,304 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,304 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:12,305 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-11-20 06:11:12,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:12,388 INFO L129 PetriNetUnfolder]: 30/232 cut-off events. [2021-11-20 06:11:12,388 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-11-20 06:11:12,389 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 232 events. 30/232 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 703 event pairs, 13 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 331. Up to 56 conditions per place. [2021-11-20 06:11:12,391 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 18 selfloop transitions, 2 changer transitions 1/131 dead transitions. [2021-11-20 06:11:12,391 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 131 transitions, 339 flow [2021-11-20 06:11:12,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:11:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-20 06:11:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2021-11-20 06:11:12,394 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014084507042254 [2021-11-20 06:11:12,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2021-11-20 06:11:12,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2021-11-20 06:11:12,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:12,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2021-11-20 06:11:12,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,400 INFO L186 Difference]: Start difference. First operand has 128 places, 127 transitions, 293 flow. Second operand 3 states and 384 transitions. [2021-11-20 06:11:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 131 transitions, 339 flow [2021-11-20 06:11:12,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 131 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-11-20 06:11:12,407 INFO L242 Difference]: Finished difference. Result has 131 places, 126 transitions, 293 flow [2021-11-20 06:11:12,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2021-11-20 06:11:12,410 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 4 predicate places. [2021-11-20 06:11:12,411 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 293 flow [2021-11-20 06:11:12,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,412 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:12,412 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:12,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:11:12,413 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash -873764727, now seen corresponding path program 1 times [2021-11-20 06:11:12,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:12,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470666830] [2021-11-20 06:11:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:12,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:12,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:12,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470666830] [2021-11-20 06:11:12,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470666830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:12,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:12,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:12,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870301479] [2021-11-20 06:11:12,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:12,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:12,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:12,695 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-11-20 06:11:12,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:12,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-11-20 06:11:12,698 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:12,893 INFO L129 PetriNetUnfolder]: 130/564 cut-off events. [2021-11-20 06:11:12,894 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-11-20 06:11:12,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 564 events. 130/564 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2594 event pairs, 64 based on Foata normal form. 5/537 useless extension candidates. Maximal degree in co-relation 899. Up to 190 conditions per place. [2021-11-20 06:11:12,906 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 22 selfloop transitions, 2 changer transitions 16/142 dead transitions. [2021-11-20 06:11:12,906 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 412 flow [2021-11-20 06:11:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:12,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:11:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2021-11-20 06:11:12,912 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535211267605634 [2021-11-20 06:11:12,912 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2021-11-20 06:11:12,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2021-11-20 06:11:12,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:12,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2021-11-20 06:11:12,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,921 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,921 INFO L186 Difference]: Start difference. First operand has 131 places, 126 transitions, 293 flow. Second operand 5 states and 606 transitions. [2021-11-20 06:11:12,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 412 flow [2021-11-20 06:11:12,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 142 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-20 06:11:12,929 INFO L242 Difference]: Finished difference. Result has 135 places, 124 transitions, 286 flow [2021-11-20 06:11:12,929 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2021-11-20 06:11:12,934 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2021-11-20 06:11:12,934 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 286 flow [2021-11-20 06:11:12,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:12,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:12,937 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:12,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:11:12,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1127355725, now seen corresponding path program 2 times [2021-11-20 06:11:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946721170] [2021-11-20 06:11:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:12,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:13,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:13,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946721170] [2021-11-20 06:11:13,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946721170] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:13,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:13,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:11:13,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594968108] [2021-11-20 06:11:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:13,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:11:13,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:11:13,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:13,230 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 142 [2021-11-20 06:11:13,232 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:13,232 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:13,232 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 142 [2021-11-20 06:11:13,232 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:13,451 INFO L129 PetriNetUnfolder]: 45/406 cut-off events. [2021-11-20 06:11:13,451 INFO L130 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2021-11-20 06:11:13,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 406 events. 45/406 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1497 event pairs, 24 based on Foata normal form. 1/381 useless extension candidates. Maximal degree in co-relation 567. Up to 80 conditions per place. [2021-11-20 06:11:13,456 INFO L132 encePairwiseOnDemand]: 133/142 looper letters, 28 selfloop transitions, 7 changer transitions 3/133 dead transitions. [2021-11-20 06:11:13,456 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 133 transitions, 382 flow [2021-11-20 06:11:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:11:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-20 06:11:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 675 transitions. [2021-11-20 06:11:13,460 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7922535211267606 [2021-11-20 06:11:13,461 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 675 transitions. [2021-11-20 06:11:13,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 675 transitions. [2021-11-20 06:11:13,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:13,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 675 transitions. [2021-11-20 06:11:13,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.5) internal successors, (675), 6 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:13,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:13,471 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:13,471 INFO L186 Difference]: Start difference. First operand has 135 places, 124 transitions, 286 flow. Second operand 6 states and 675 transitions. [2021-11-20 06:11:13,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 133 transitions, 382 flow [2021-11-20 06:11:13,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 133 transitions, 374 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-11-20 06:11:13,479 INFO L242 Difference]: Finished difference. Result has 135 places, 125 transitions, 304 flow [2021-11-20 06:11:13,479 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=135, PETRI_TRANSITIONS=125} [2021-11-20 06:11:13,483 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2021-11-20 06:11:13,483 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 125 transitions, 304 flow [2021-11-20 06:11:13,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.66666666666667) internal successors, (658), 6 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:13,484 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:13,485 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:13,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:11:13,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:13,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:13,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1841994065, now seen corresponding path program 1 times [2021-11-20 06:11:13,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:13,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146077243] [2021-11-20 06:11:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:13,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:14,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:14,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146077243] [2021-11-20 06:11:14,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146077243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:14,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738945964] [2021-11-20 06:11:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:14,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:14,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:14,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:11:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:14,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:11:14,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:15,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:11:16,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:11:16,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:11:17,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-20 06:11:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:17,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:26,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:11:26,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1444 treesize of output 1412 [2021-11-20 06:11:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:41,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738945964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:41,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:11:41,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 25] total 67 [2021-11-20 06:11:41,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848645533] [2021-11-20 06:11:41,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:41,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-20 06:11:41,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-20 06:11:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=3851, Unknown=6, NotChecked=0, Total=4422 [2021-11-20 06:11:41,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 142 [2021-11-20 06:11:41,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 125 transitions, 304 flow. Second operand has 67 states, 67 states have (on average 58.53731343283582) internal successors, (3922), 67 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:41,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:41,652 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 142 [2021-11-20 06:11:41,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:51,315 INFO L129 PetriNetUnfolder]: 1081/2353 cut-off events. [2021-11-20 06:11:51,315 INFO L130 PetriNetUnfolder]: For 366/366 co-relation queries the response was YES. [2021-11-20 06:11:51,325 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4680 conditions, 2353 events. 1081/2353 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 14438 event pairs, 19 based on Foata normal form. 12/2261 useless extension candidates. Maximal degree in co-relation 4670. Up to 348 conditions per place. [2021-11-20 06:11:51,345 INFO L132 encePairwiseOnDemand]: 105/142 looper letters, 244 selfloop transitions, 115 changer transitions 10/420 dead transitions. [2021-11-20 06:11:51,345 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 420 transitions, 1760 flow [2021-11-20 06:11:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-20 06:11:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-11-20 06:11:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 4071 transitions. [2021-11-20 06:11:51,368 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.43437900128040974 [2021-11-20 06:11:51,369 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 4071 transitions. [2021-11-20 06:11:51,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 4071 transitions. [2021-11-20 06:11:51,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:51,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 4071 transitions. [2021-11-20 06:11:51,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 61.68181818181818) internal successors, (4071), 66 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:51,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 142.0) internal successors, (9514), 67 states have internal predecessors, (9514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:51,417 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 142.0) internal successors, (9514), 67 states have internal predecessors, (9514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:51,417 INFO L186 Difference]: Start difference. First operand has 135 places, 125 transitions, 304 flow. Second operand 66 states and 4071 transitions. [2021-11-20 06:11:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 420 transitions, 1760 flow [2021-11-20 06:11:51,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 420 transitions, 1704 flow, removed 21 selfloop flow, removed 5 redundant places. [2021-11-20 06:11:51,431 INFO L242 Difference]: Finished difference. Result has 234 places, 252 transitions, 1143 flow [2021-11-20 06:11:51,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=1143, PETRI_PLACES=234, PETRI_TRANSITIONS=252} [2021-11-20 06:11:51,432 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 107 predicate places. [2021-11-20 06:11:51,432 INFO L470 AbstractCegarLoop]: Abstraction has has 234 places, 252 transitions, 1143 flow [2021-11-20 06:11:51,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 58.53731343283582) internal successors, (3922), 67 states have internal predecessors, (3922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:51,435 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:51,435 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:51,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:51,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:51,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:51,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:51,650 INFO L85 PathProgramCache]: Analyzing trace with hash -876286103, now seen corresponding path program 2 times [2021-11-20 06:11:51,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:51,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384118699] [2021-11-20 06:11:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:51,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:51,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:51,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:51,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384118699] [2021-11-20 06:11:51,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384118699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:51,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664168667] [2021-11-20 06:11:51,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:51,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:51,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:51,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:51,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:11:51,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:51,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:11:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:52,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:52,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664168667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:52,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:11:52,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 9 [2021-11-20 06:11:52,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599293793] [2021-11-20 06:11:52,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:52,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:11:52,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:11:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:11:52,876 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 142 [2021-11-20 06:11:52,878 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 252 transitions, 1143 flow. Second operand has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:52,878 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:52,878 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 142 [2021-11-20 06:11:52,878 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:53,928 INFO L129 PetriNetUnfolder]: 786/2368 cut-off events. [2021-11-20 06:11:53,928 INFO L130 PetriNetUnfolder]: For 5655/5677 co-relation queries the response was YES. [2021-11-20 06:11:53,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6612 conditions, 2368 events. 786/2368 cut-off events. For 5655/5677 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 15484 event pairs, 49 based on Foata normal form. 13/2285 useless extension candidates. Maximal degree in co-relation 6565. Up to 491 conditions per place. [2021-11-20 06:11:53,965 INFO L132 encePairwiseOnDemand]: 133/142 looper letters, 229 selfloop transitions, 130 changer transitions 44/542 dead transitions. [2021-11-20 06:11:53,966 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 542 transitions, 3581 flow [2021-11-20 06:11:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:11:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-20 06:11:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1435 transitions. [2021-11-20 06:11:53,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8421361502347418 [2021-11-20 06:11:53,974 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1435 transitions. [2021-11-20 06:11:53,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1435 transitions. [2021-11-20 06:11:53,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:53,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1435 transitions. [2021-11-20 06:11:53,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 119.58333333333333) internal successors, (1435), 12 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,990 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:53,990 INFO L186 Difference]: Start difference. First operand has 234 places, 252 transitions, 1143 flow. Second operand 12 states and 1435 transitions. [2021-11-20 06:11:53,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 542 transitions, 3581 flow [2021-11-20 06:11:54,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 542 transitions, 3366 flow, removed 90 selfloop flow, removed 18 redundant places. [2021-11-20 06:11:54,079 INFO L242 Difference]: Finished difference. Result has 229 places, 389 transitions, 2255 flow [2021-11-20 06:11:54,080 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2255, PETRI_PLACES=229, PETRI_TRANSITIONS=389} [2021-11-20 06:11:54,082 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 102 predicate places. [2021-11-20 06:11:54,083 INFO L470 AbstractCegarLoop]: Abstraction has has 229 places, 389 transitions, 2255 flow [2021-11-20 06:11:54,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:54,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:54,084 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:54,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:54,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:54,301 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:54,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:54,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1975908202, now seen corresponding path program 3 times [2021-11-20 06:11:54,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:54,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041485898] [2021-11-20 06:11:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:54,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:11:54,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041485898] [2021-11-20 06:11:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041485898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:54,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:11:54,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619647884] [2021-11-20 06:11:54,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:54,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:11:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:11:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:11:54,467 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-11-20 06:11:54,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 389 transitions, 2255 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:54,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:54,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-11-20 06:11:54,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:11:55,114 INFO L129 PetriNetUnfolder]: 390/1907 cut-off events. [2021-11-20 06:11:55,115 INFO L130 PetriNetUnfolder]: For 3264/3496 co-relation queries the response was YES. [2021-11-20 06:11:55,133 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4868 conditions, 1907 events. 390/1907 cut-off events. For 3264/3496 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 13596 event pairs, 37 based on Foata normal form. 142/1936 useless extension candidates. Maximal degree in co-relation 4820. Up to 390 conditions per place. [2021-11-20 06:11:55,145 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 164 selfloop transitions, 4 changer transitions 33/368 dead transitions. [2021-11-20 06:11:55,145 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 368 transitions, 2391 flow [2021-11-20 06:11:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:11:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:11:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-11-20 06:11:55,148 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8855633802816901 [2021-11-20 06:11:55,148 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-11-20 06:11:55,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-11-20 06:11:55,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:11:55,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-11-20 06:11:55,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:55,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:55,153 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:55,153 INFO L186 Difference]: Start difference. First operand has 229 places, 389 transitions, 2255 flow. Second operand 4 states and 503 transitions. [2021-11-20 06:11:55,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 368 transitions, 2391 flow [2021-11-20 06:11:55,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 368 transitions, 2380 flow, removed 4 selfloop flow, removed 1 redundant places. [2021-11-20 06:11:55,187 INFO L242 Difference]: Finished difference. Result has 233 places, 317 transitions, 1754 flow [2021-11-20 06:11:55,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1754, PETRI_PLACES=233, PETRI_TRANSITIONS=317} [2021-11-20 06:11:55,189 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 106 predicate places. [2021-11-20 06:11:55,189 INFO L470 AbstractCegarLoop]: Abstraction has has 233 places, 317 transitions, 1754 flow [2021-11-20 06:11:55,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:55,190 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:11:55,190 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:55,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:11:55,191 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:11:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash -389948585, now seen corresponding path program 1 times [2021-11-20 06:11:55,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:55,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097403080] [2021-11-20 06:11:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:55,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:55,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:11:55,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:55,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097403080] [2021-11-20 06:11:55,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097403080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:55,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296327310] [2021-11-20 06:11:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:55,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:55,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:55,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:55,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:11:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:11:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:11:56,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:57,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296327310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:57,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:11:57,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 15] total 39 [2021-11-20 06:11:57,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66612740] [2021-11-20 06:11:57,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:57,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 06:11:57,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 06:11:57,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:11:57,948 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 142 [2021-11-20 06:11:57,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 317 transitions, 1754 flow. Second operand has 39 states, 39 states have (on average 97.8974358974359) internal successors, (3818), 39 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:11:57,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:11:57,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 142 [2021-11-20 06:11:57,954 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:00,188 INFO L129 PetriNetUnfolder]: 526/2000 cut-off events. [2021-11-20 06:12:00,188 INFO L130 PetriNetUnfolder]: For 4150/4164 co-relation queries the response was YES. [2021-11-20 06:12:00,208 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5825 conditions, 2000 events. 526/2000 cut-off events. For 4150/4164 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 12681 event pairs, 137 based on Foata normal form. 25/1943 useless extension candidates. Maximal degree in co-relation 5774. Up to 680 conditions per place. [2021-11-20 06:12:00,222 INFO L132 encePairwiseOnDemand]: 122/142 looper letters, 128 selfloop transitions, 18 changer transitions 75/317 dead transitions. [2021-11-20 06:12:00,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 317 transitions, 2079 flow [2021-11-20 06:12:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:12:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-20 06:12:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2392 transitions. [2021-11-20 06:12:00,229 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7018779342723005 [2021-11-20 06:12:00,229 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2392 transitions. [2021-11-20 06:12:00,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2392 transitions. [2021-11-20 06:12:00,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:00,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2392 transitions. [2021-11-20 06:12:00,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 99.66666666666667) internal successors, (2392), 24 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:00,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:00,248 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:00,248 INFO L186 Difference]: Start difference. First operand has 233 places, 317 transitions, 1754 flow. Second operand 24 states and 2392 transitions. [2021-11-20 06:12:00,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 317 transitions, 2079 flow [2021-11-20 06:12:00,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 317 transitions, 2034 flow, removed 22 selfloop flow, removed 8 redundant places. [2021-11-20 06:12:00,284 INFO L242 Difference]: Finished difference. Result has 239 places, 231 transitions, 1192 flow [2021-11-20 06:12:00,285 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1192, PETRI_PLACES=239, PETRI_TRANSITIONS=231} [2021-11-20 06:12:00,286 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 112 predicate places. [2021-11-20 06:12:00,286 INFO L470 AbstractCegarLoop]: Abstraction has has 239 places, 231 transitions, 1192 flow [2021-11-20 06:12:00,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 97.8974358974359) internal successors, (3818), 39 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:00,303 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:00,304 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:00,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:00,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:12:00,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:12:00,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:00,507 INFO L85 PathProgramCache]: Analyzing trace with hash 699321437, now seen corresponding path program 2 times [2021-11-20 06:12:00,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:00,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517601951] [2021-11-20 06:12:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:00,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:02,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:02,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517601951] [2021-11-20 06:12:02,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517601951] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:02,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133652238] [2021-11-20 06:12:02,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:12:02,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:02,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:02,940 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:02,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:12:03,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:12:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:03,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 06:12:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:05,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:12:05,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:12:06,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:12:08,312 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:12:08,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:12:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:08,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:27,409 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:12:27,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19554 treesize of output 18484 [2021-11-20 06:12:27,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:12:27,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:27,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-11-20 06:12:27,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966222810] [2021-11-20 06:12:27,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:27,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:12:27,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:27,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:12:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=8656, Unknown=4, NotChecked=0, Total=9506 [2021-11-20 06:12:27,534 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2021-11-20 06:12:27,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 231 transitions, 1192 flow. Second operand has 36 states, 36 states have (on average 64.38888888888889) internal successors, (2318), 36 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:27,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:27,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2021-11-20 06:12:27,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:35,514 INFO L129 PetriNetUnfolder]: 2552/6206 cut-off events. [2021-11-20 06:12:35,514 INFO L130 PetriNetUnfolder]: For 9853/9891 co-relation queries the response was YES. [2021-11-20 06:12:35,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18949 conditions, 6206 events. 2552/6206 cut-off events. For 9853/9891 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 47784 event pairs, 393 based on Foata normal form. 16/6015 useless extension candidates. Maximal degree in co-relation 18899. Up to 1926 conditions per place. [2021-11-20 06:12:35,618 INFO L132 encePairwiseOnDemand]: 109/142 looper letters, 343 selfloop transitions, 71 changer transitions 17/488 dead transitions. [2021-11-20 06:12:35,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 488 transitions, 3508 flow [2021-11-20 06:12:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 06:12:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-20 06:12:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3050 transitions. [2021-11-20 06:12:35,628 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.47730829420970267 [2021-11-20 06:12:35,628 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3050 transitions. [2021-11-20 06:12:35,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3050 transitions. [2021-11-20 06:12:35,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:35,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3050 transitions. [2021-11-20 06:12:35,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 67.77777777777777) internal successors, (3050), 45 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,654 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,654 INFO L186 Difference]: Start difference. First operand has 239 places, 231 transitions, 1192 flow. Second operand 45 states and 3050 transitions. [2021-11-20 06:12:35,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 488 transitions, 3508 flow [2021-11-20 06:12:35,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 488 transitions, 3299 flow, removed 86 selfloop flow, removed 28 redundant places. [2021-11-20 06:12:35,721 INFO L242 Difference]: Finished difference. Result has 258 places, 287 transitions, 1817 flow [2021-11-20 06:12:35,722 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1817, PETRI_PLACES=258, PETRI_TRANSITIONS=287} [2021-11-20 06:12:35,722 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 131 predicate places. [2021-11-20 06:12:35,723 INFO L470 AbstractCegarLoop]: Abstraction has has 258 places, 287 transitions, 1817 flow [2021-11-20 06:12:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 64.38888888888889) internal successors, (2318), 36 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,723 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:35,724 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:35,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:35,925 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:12:35,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2067564439, now seen corresponding path program 3 times [2021-11-20 06:12:35,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461792205] [2021-11-20 06:12:35,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:12:36,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461792205] [2021-11-20 06:12:36,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461792205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:36,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086364397] [2021-11-20 06:12:36,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:12:36,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:36,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:36,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:36,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:12:36,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 06:12:36,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-20 06:12:36,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:37,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:12:38,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:12:38,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:12:40,111 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-11-20 06:12:40,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 27 [2021-11-20 06:12:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:40,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:50,464 INFO L354 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-11-20 06:12:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19266 treesize of output 18206 [2021-11-20 06:12:50,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:12:50,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:50,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:12:50,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86720666] [2021-11-20 06:12:50,533 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:50,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:12:50,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:12:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=4116, Unknown=2, NotChecked=0, Total=4556 [2021-11-20 06:12:50,538 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2021-11-20 06:12:50,540 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 287 transitions, 1817 flow. Second operand has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:50,540 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:50,540 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2021-11-20 06:12:50,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:53,447 INFO L129 PetriNetUnfolder]: 2870/7682 cut-off events. [2021-11-20 06:12:53,447 INFO L130 PetriNetUnfolder]: For 11903/11967 co-relation queries the response was YES. [2021-11-20 06:12:53,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23014 conditions, 7682 events. 2870/7682 cut-off events. For 11903/11967 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 66140 event pairs, 505 based on Foata normal form. 32/7379 useless extension candidates. Maximal degree in co-relation 22951. Up to 2822 conditions per place. [2021-11-20 06:12:53,560 INFO L132 encePairwiseOnDemand]: 126/142 looper letters, 283 selfloop transitions, 89 changer transitions 15/482 dead transitions. [2021-11-20 06:12:53,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 482 transitions, 3848 flow [2021-11-20 06:12:53,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:12:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-20 06:12:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2222 transitions. [2021-11-20 06:12:53,566 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6519953051643192 [2021-11-20 06:12:53,566 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2222 transitions. [2021-11-20 06:12:53,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2222 transitions. [2021-11-20 06:12:53,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:53,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2222 transitions. [2021-11-20 06:12:53,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.58333333333333) internal successors, (2222), 24 states have internal predecessors, (2222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:53,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:53,686 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 142.0) internal successors, (3550), 25 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:53,686 INFO L186 Difference]: Start difference. First operand has 258 places, 287 transitions, 1817 flow. Second operand 24 states and 2222 transitions. [2021-11-20 06:12:53,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 482 transitions, 3848 flow [2021-11-20 06:12:53,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 482 transitions, 3721 flow, removed 48 selfloop flow, removed 12 redundant places. [2021-11-20 06:12:53,796 INFO L242 Difference]: Finished difference. Result has 283 places, 328 transitions, 2463 flow [2021-11-20 06:12:53,798 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2463, PETRI_PLACES=283, PETRI_TRANSITIONS=328} [2021-11-20 06:12:53,799 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 156 predicate places. [2021-11-20 06:12:53,799 INFO L470 AbstractCegarLoop]: Abstraction has has 283 places, 328 transitions, 2463 flow [2021-11-20 06:12:53,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:53,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:53,802 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:53,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:54,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:12:54,029 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:12:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash 429202925, now seen corresponding path program 4 times [2021-11-20 06:12:54,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:54,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015557597] [2021-11-20 06:12:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:54,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:56,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015557597] [2021-11-20 06:12:56,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015557597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:56,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553182221] [2021-11-20 06:12:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:12:56,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:56,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:56,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:12:56,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:12:56,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 06:12:56,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:12:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:12:58,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:13:00,680 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:13:00,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:13:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:13:00,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:27,195 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:13:27,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19554 treesize of output 18484 [2021-11-20 06:13:27,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:13:27,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:13:27,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-20 06:13:27,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494566807] [2021-11-20 06:13:27,307 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:27,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:13:27,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:13:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=833, Invalid=8277, Unknown=10, NotChecked=0, Total=9120 [2021-11-20 06:13:27,314 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2021-11-20 06:13:27,317 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 328 transitions, 2463 flow. Second operand has 34 states, 34 states have (on average 64.52941176470588) internal successors, (2194), 34 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:27,317 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:13:27,317 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2021-11-20 06:13:27,317 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:13:35,287 INFO L129 PetriNetUnfolder]: 4967/12181 cut-off events. [2021-11-20 06:13:35,287 INFO L130 PetriNetUnfolder]: For 24415/24495 co-relation queries the response was YES. [2021-11-20 06:13:35,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38549 conditions, 12181 events. 4967/12181 cut-off events. For 24415/24495 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 111569 event pairs, 1114 based on Foata normal form. 24/11714 useless extension candidates. Maximal degree in co-relation 38472. Up to 5082 conditions per place. [2021-11-20 06:13:35,529 INFO L132 encePairwiseOnDemand]: 108/142 looper letters, 399 selfloop transitions, 165 changer transitions 22/643 dead transitions. [2021-11-20 06:13:35,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 643 transitions, 5877 flow [2021-11-20 06:13:35,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 06:13:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-20 06:13:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3077 transitions. [2021-11-20 06:13:35,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4815336463223787 [2021-11-20 06:13:35,537 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3077 transitions. [2021-11-20 06:13:35,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3077 transitions. [2021-11-20 06:13:35,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:13:35,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3077 transitions. [2021-11-20 06:13:35,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 68.37777777777778) internal successors, (3077), 45 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:35,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:35,561 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:35,561 INFO L186 Difference]: Start difference. First operand has 283 places, 328 transitions, 2463 flow. Second operand 45 states and 3077 transitions. [2021-11-20 06:13:35,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 643 transitions, 5877 flow [2021-11-20 06:13:35,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 643 transitions, 5757 flow, removed 48 selfloop flow, removed 4 redundant places. [2021-11-20 06:13:35,849 INFO L242 Difference]: Finished difference. Result has 343 places, 432 transitions, 4103 flow [2021-11-20 06:13:35,850 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4103, PETRI_PLACES=343, PETRI_TRANSITIONS=432} [2021-11-20 06:13:35,851 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 216 predicate places. [2021-11-20 06:13:35,852 INFO L470 AbstractCegarLoop]: Abstraction has has 343 places, 432 transitions, 4103 flow [2021-11-20 06:13:35,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 64.52941176470588) internal successors, (2194), 34 states have internal predecessors, (2194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:35,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:13:35,853 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:35,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:36,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:36,069 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:13:36,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:36,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1356573271, now seen corresponding path program 5 times [2021-11-20 06:13:36,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:36,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932314641] [2021-11-20 06:13:36,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:36,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:13:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:13:36,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932314641] [2021-11-20 06:13:36,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932314641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:13:36,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616185583] [2021-11-20 06:13:36,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:13:36,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:36,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:36,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:13:36,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-20 06:13:36,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:13:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 06:13:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:13:37,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:13:38,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:13:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:13:41,277 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-11-20 06:13:41,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 35 [2021-11-20 06:13:41,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:13:41,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:19,431 INFO L354 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-11-20 06:14:19,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2332736 treesize of output 2263006 [2021-11-20 06:14:26,577 WARN L227 SmtUtils]: Spent 7.14s on a formula simplification that was a NOOP. DAG size: 1452 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:14:26,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:14:26,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:14:26,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:14:26,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703615036] [2021-11-20 06:14:26,609 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:26,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:14:26,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:14:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=5630, Unknown=12, NotChecked=0, Total=6642 [2021-11-20 06:14:26,614 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2021-11-20 06:14:26,615 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 432 transitions, 4103 flow. Second operand has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:26,615 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:14:26,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2021-11-20 06:14:26,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:14:32,463 INFO L129 PetriNetUnfolder]: 5805/15264 cut-off events. [2021-11-20 06:14:32,464 INFO L130 PetriNetUnfolder]: For 45089/45225 co-relation queries the response was YES. [2021-11-20 06:14:32,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51285 conditions, 15264 events. 5805/15264 cut-off events. For 45089/45225 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 153660 event pairs, 1058 based on Foata normal form. 72/14644 useless extension candidates. Maximal degree in co-relation 51188. Up to 4856 conditions per place. [2021-11-20 06:14:32,753 INFO L132 encePairwiseOnDemand]: 126/142 looper letters, 360 selfloop transitions, 149 changer transitions 19/625 dead transitions. [2021-11-20 06:14:32,753 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 625 transitions, 6764 flow [2021-11-20 06:14:32,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:14:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-20 06:14:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1947 transitions. [2021-11-20 06:14:32,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6529175050301811 [2021-11-20 06:14:32,769 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1947 transitions. [2021-11-20 06:14:32,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1947 transitions. [2021-11-20 06:14:32,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:14:32,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1947 transitions. [2021-11-20 06:14:32,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.71428571428571) internal successors, (1947), 21 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:32,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:32,787 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:32,787 INFO L186 Difference]: Start difference. First operand has 343 places, 432 transitions, 4103 flow. Second operand 21 states and 1947 transitions. [2021-11-20 06:14:32,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 625 transitions, 6764 flow [2021-11-20 06:14:33,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 625 transitions, 6493 flow, removed 117 selfloop flow, removed 20 redundant places. [2021-11-20 06:14:33,237 INFO L242 Difference]: Finished difference. Result has 357 places, 487 transitions, 5245 flow [2021-11-20 06:14:33,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5245, PETRI_PLACES=357, PETRI_TRANSITIONS=487} [2021-11-20 06:14:33,238 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 230 predicate places. [2021-11-20 06:14:33,238 INFO L470 AbstractCegarLoop]: Abstraction has has 357 places, 487 transitions, 5245 flow [2021-11-20 06:14:33,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:14:33,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:14:33,239 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:33,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:33,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:14:33,453 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:14:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1884245543, now seen corresponding path program 6 times [2021-11-20 06:14:33,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:33,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628027789] [2021-11-20 06:14:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:33,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:35,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628027789] [2021-11-20 06:14:35,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628027789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:14:35,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986848017] [2021-11-20 06:14:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:14:35,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:35,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:35,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:14:35,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-20 06:14:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:35,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-20 06:14:35,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:37,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:14:37,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:14:38,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:14:40,135 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:14:40,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:14:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:14:40,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:04,836 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:15:04,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19554 treesize of output 18484 [2021-11-20 06:15:04,910 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:15:04,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:04,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 06:15:04,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65741707] [2021-11-20 06:15:04,911 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:04,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:15:04,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:04,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:15:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=836, Invalid=6467, Unknown=7, NotChecked=0, Total=7310 [2021-11-20 06:15:04,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 142 [2021-11-20 06:15:04,919 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 487 transitions, 5245 flow. Second operand has 32 states, 32 states have (on average 68.5) internal successors, (2192), 32 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:04,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:04,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 142 [2021-11-20 06:15:04,920 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:15:15,419 INFO L129 PetriNetUnfolder]: 6685/17376 cut-off events. [2021-11-20 06:15:15,419 INFO L130 PetriNetUnfolder]: For 62398/62614 co-relation queries the response was YES. [2021-11-20 06:15:15,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60594 conditions, 17376 events. 6685/17376 cut-off events. For 62398/62614 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 178625 event pairs, 1456 based on Foata normal form. 82/16612 useless extension candidates. Maximal degree in co-relation 60482. Up to 8361 conditions per place. [2021-11-20 06:15:15,901 INFO L132 encePairwiseOnDemand]: 111/142 looper letters, 435 selfloop transitions, 220 changer transitions 19/740 dead transitions. [2021-11-20 06:15:15,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 740 transitions, 8898 flow [2021-11-20 06:15:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-20 06:15:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-11-20 06:15:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3144 transitions. [2021-11-20 06:15:15,908 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5032010243277849 [2021-11-20 06:15:15,908 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3144 transitions. [2021-11-20 06:15:15,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3144 transitions. [2021-11-20 06:15:15,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:15:15,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3144 transitions. [2021-11-20 06:15:15,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 71.45454545454545) internal successors, (3144), 44 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:15,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 142.0) internal successors, (6390), 45 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:15,931 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 142.0) internal successors, (6390), 45 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:15,931 INFO L186 Difference]: Start difference. First operand has 357 places, 487 transitions, 5245 flow. Second operand 44 states and 3144 transitions. [2021-11-20 06:15:15,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 740 transitions, 8898 flow [2021-11-20 06:15:16,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 740 transitions, 8758 flow, removed 52 selfloop flow, removed 5 redundant places. [2021-11-20 06:15:16,382 INFO L242 Difference]: Finished difference. Result has 413 places, 572 transitions, 7193 flow [2021-11-20 06:15:16,382 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7193, PETRI_PLACES=413, PETRI_TRANSITIONS=572} [2021-11-20 06:15:16,383 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 286 predicate places. [2021-11-20 06:15:16,383 INFO L470 AbstractCegarLoop]: Abstraction has has 413 places, 572 transitions, 7193 flow [2021-11-20 06:15:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 68.5) internal successors, (2192), 32 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:16,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:15:16,384 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:16,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 06:15:16,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:15:16,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:15:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2136241019, now seen corresponding path program 7 times [2021-11-20 06:15:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:16,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622100354] [2021-11-20 06:15:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:16,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:20,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:20,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622100354] [2021-11-20 06:15:20,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622100354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:15:20,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127169791] [2021-11-20 06:15:20,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:15:20,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:20,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:20,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:20,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:15:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:15:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-20 06:15:20,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:22,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:15:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:15:23,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:15:24,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:15:27,237 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:15:27,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:15:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:15:27,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:48,694 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:15:48,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 342878 treesize of output 333166 [2021-11-20 06:15:49,832 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:15:49,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:15:49,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-11-20 06:15:49,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513037562] [2021-11-20 06:15:49,833 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:49,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 06:15:49,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:49,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 06:15:49,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=9969, Unknown=3, NotChecked=0, Total=10920 [2021-11-20 06:15:49,841 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 142 [2021-11-20 06:15:49,843 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 572 transitions, 7193 flow. Second operand has 42 states, 42 states have (on average 48.38095238095238) internal successors, (2032), 42 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:15:49,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:15:49,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 142 [2021-11-20 06:15:49,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:16:22,290 INFO L129 PetriNetUnfolder]: 16909/39030 cut-off events. [2021-11-20 06:16:22,291 INFO L130 PetriNetUnfolder]: For 156911/157169 co-relation queries the response was YES. [2021-11-20 06:16:23,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 137452 conditions, 39030 events. 16909/39030 cut-off events. For 156911/157169 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 411577 event pairs, 3610 based on Foata normal form. 46/37438 useless extension candidates. Maximal degree in co-relation 137322. Up to 18742 conditions per place. [2021-11-20 06:16:23,647 INFO L132 encePairwiseOnDemand]: 106/142 looper letters, 687 selfloop transitions, 214 changer transitions 35/981 dead transitions. [2021-11-20 06:16:23,647 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 981 transitions, 12376 flow [2021-11-20 06:16:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-20 06:16:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-20 06:16:23,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3174 transitions. [2021-11-20 06:16:23,656 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.37253521126760564 [2021-11-20 06:16:23,657 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3174 transitions. [2021-11-20 06:16:23,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3174 transitions. [2021-11-20 06:16:23,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:16:23,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3174 transitions. [2021-11-20 06:16:23,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.9) internal successors, (3174), 60 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:23,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 142.0) internal successors, (8662), 61 states have internal predecessors, (8662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:23,685 INFO L186 Difference]: Start difference. First operand has 413 places, 572 transitions, 7193 flow. Second operand 60 states and 3174 transitions. [2021-11-20 06:16:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 981 transitions, 12376 flow [2021-11-20 06:16:25,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 981 transitions, 12039 flow, removed 148 selfloop flow, removed 21 redundant places. [2021-11-20 06:16:25,654 INFO L242 Difference]: Finished difference. Result has 484 places, 673 transitions, 9225 flow [2021-11-20 06:16:25,654 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9225, PETRI_PLACES=484, PETRI_TRANSITIONS=673} [2021-11-20 06:16:25,655 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 357 predicate places. [2021-11-20 06:16:25,655 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 673 transitions, 9225 flow [2021-11-20 06:16:25,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 48.38095238095238) internal successors, (2032), 42 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:25,656 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:16:25,657 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:16:25,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-20 06:16:25,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:16:25,885 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:16:25,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:16:25,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1693539497, now seen corresponding path program 8 times [2021-11-20 06:16:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:16:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046086779] [2021-11-20 06:16:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:16:25,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:16:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:16:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:29,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:16:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046086779] [2021-11-20 06:16:29,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046086779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:16:29,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142955389] [2021-11-20 06:16:29,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:16:29,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:16:29,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:16:29,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:16:29,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:16:29,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:16:29,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:16:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 06:16:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:16:31,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:16:32,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:16:32,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:16:35,756 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:16:35,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:16:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:16:35,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:16:59,449 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:16:59,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19554 treesize of output 18484 [2021-11-20 06:16:59,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:16:59,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:16:59,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-11-20 06:16:59,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054395295] [2021-11-20 06:16:59,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:16:59,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 06:16:59,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:16:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 06:16:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=8275, Unknown=7, NotChecked=0, Total=9120 [2021-11-20 06:16:59,533 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 142 [2021-11-20 06:16:59,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 673 transitions, 9225 flow. Second operand has 34 states, 34 states have (on average 68.3529411764706) internal successors, (2324), 34 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:16:59,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:16:59,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 142 [2021-11-20 06:16:59,536 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:17:29,861 INFO L129 PetriNetUnfolder]: 9316/24606 cut-off events. [2021-11-20 06:17:29,861 INFO L130 PetriNetUnfolder]: For 146821/147101 co-relation queries the response was YES. [2021-11-20 06:17:30,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 97006 conditions, 24606 events. 9316/24606 cut-off events. For 146821/147101 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 267136 event pairs, 2052 based on Foata normal form. 169/23521 useless extension candidates. Maximal degree in co-relation 96842. Up to 11999 conditions per place. [2021-11-20 06:17:30,891 INFO L132 encePairwiseOnDemand]: 109/142 looper letters, 551 selfloop transitions, 353 changer transitions 52/1024 dead transitions. [2021-11-20 06:17:30,891 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1024 transitions, 14342 flow [2021-11-20 06:17:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-20 06:17:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-11-20 06:17:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 5125 transitions. [2021-11-20 06:17:30,898 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5012715179968701 [2021-11-20 06:17:30,898 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 5125 transitions. [2021-11-20 06:17:30,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 5125 transitions. [2021-11-20 06:17:30,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:17:30,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 5125 transitions. [2021-11-20 06:17:30,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 71.18055555555556) internal successors, (5125), 72 states have internal predecessors, (5125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,920 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 142.0) internal successors, (10366), 73 states have internal predecessors, (10366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:30,920 INFO L186 Difference]: Start difference. First operand has 484 places, 673 transitions, 9225 flow. Second operand 72 states and 5125 transitions. [2021-11-20 06:17:30,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1024 transitions, 14342 flow [2021-11-20 06:17:32,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1024 transitions, 13347 flow, removed 337 selfloop flow, removed 30 redundant places. [2021-11-20 06:17:32,442 INFO L242 Difference]: Finished difference. Result has 562 places, 809 transitions, 11503 flow [2021-11-20 06:17:32,442 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=8464, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=11503, PETRI_PLACES=562, PETRI_TRANSITIONS=809} [2021-11-20 06:17:32,443 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 435 predicate places. [2021-11-20 06:17:32,443 INFO L470 AbstractCegarLoop]: Abstraction has has 562 places, 809 transitions, 11503 flow [2021-11-20 06:17:32,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 68.3529411764706) internal successors, (2324), 34 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:32,444 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:17:32,444 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:17:32,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 06:17:32,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:17:32,644 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:17:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:17:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1899604327, now seen corresponding path program 9 times [2021-11-20 06:17:32,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:17:32,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022397436] [2021-11-20 06:17:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:17:32,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:17:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:17:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:17:33,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:17:33,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022397436] [2021-11-20 06:17:33,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022397436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:17:33,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752367121] [2021-11-20 06:17:33,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:17:33,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:17:33,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:17:33,550 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:17:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:17:33,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:17:33,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:17:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 06:17:33,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:17:35,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:17:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:17:36,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:17:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:17:39,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:17:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 29 [2021-11-20 06:17:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:17:40,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:17:54,232 INFO L354 Elim1Store]: treesize reduction 76, result has 24.0 percent of original size [2021-11-20 06:17:54,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19530 treesize of output 18433 [2021-11-20 06:17:54,516 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:17:54,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:17:54,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:17:54,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772373664] [2021-11-20 06:17:54,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:17:54,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:17:54,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:17:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:17:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=6778, Unknown=1, NotChecked=0, Total=7832 [2021-11-20 06:17:54,519 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2021-11-20 06:17:54,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 809 transitions, 11503 flow. Second operand has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:17:54,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:17:54,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2021-11-20 06:17:54,521 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:18:08,628 INFO L129 PetriNetUnfolder]: 9959/26120 cut-off events. [2021-11-20 06:18:08,628 INFO L130 PetriNetUnfolder]: For 244473/244789 co-relation queries the response was YES. [2021-11-20 06:18:09,435 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120649 conditions, 26120 events. 9959/26120 cut-off events. For 244473/244789 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 287337 event pairs, 1876 based on Foata normal form. 86/25050 useless extension candidates. Maximal degree in co-relation 120453. Up to 6498 conditions per place. [2021-11-20 06:18:09,754 INFO L132 encePairwiseOnDemand]: 126/142 looper letters, 599 selfloop transitions, 256 changer transitions 17/971 dead transitions. [2021-11-20 06:18:09,754 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 971 transitions, 14876 flow [2021-11-20 06:18:09,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:18:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-20 06:18:09,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1950 transitions. [2021-11-20 06:18:09,757 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6539235412474849 [2021-11-20 06:18:09,757 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1950 transitions. [2021-11-20 06:18:09,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1950 transitions. [2021-11-20 06:18:09,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:18:09,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1950 transitions. [2021-11-20 06:18:09,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.85714285714286) internal successors, (1950), 21 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:09,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:09,763 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 142.0) internal successors, (3124), 22 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:09,763 INFO L186 Difference]: Start difference. First operand has 562 places, 809 transitions, 11503 flow. Second operand 21 states and 1950 transitions. [2021-11-20 06:18:09,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 971 transitions, 14876 flow [2021-11-20 06:18:11,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 971 transitions, 14133 flow, removed 349 selfloop flow, removed 32 redundant places. [2021-11-20 06:18:11,822 INFO L242 Difference]: Finished difference. Result has 550 places, 825 transitions, 11927 flow [2021-11-20 06:18:11,824 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=10768, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11927, PETRI_PLACES=550, PETRI_TRANSITIONS=825} [2021-11-20 06:18:11,824 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 423 predicate places. [2021-11-20 06:18:11,824 INFO L470 AbstractCegarLoop]: Abstraction has has 550 places, 825 transitions, 11927 flow [2021-11-20 06:18:11,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:11,825 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:18:11,825 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:18:11,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:18:12,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:18:12,045 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:18:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:18:12,046 INFO L85 PathProgramCache]: Analyzing trace with hash -624083685, now seen corresponding path program 10 times [2021-11-20 06:18:12,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:18:12,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563740337] [2021-11-20 06:18:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:18:12,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:18:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:18:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:18:12,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:18:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563740337] [2021-11-20 06:18:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563740337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:18:12,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664194348] [2021-11-20 06:18:12,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:18:12,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:18:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:18:12,790 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:18:12,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:18:12,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:18:12,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:18:12,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-20 06:18:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:18:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:18:15,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:18:15,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:18:17,918 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-20 06:18:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 21 [2021-11-20 06:18:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:18:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:18:41,666 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-11-20 06:18:41,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19554 treesize of output 18484 [2021-11-20 06:18:41,734 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 06:18:41,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:18:41,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 06:18:41,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150737904] [2021-11-20 06:18:41,734 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:18:41,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:18:41,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:18:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:18:41,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=766, Invalid=5387, Unknown=9, NotChecked=0, Total=6162 [2021-11-20 06:18:41,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 142 [2021-11-20 06:18:41,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 825 transitions, 11927 flow. Second operand has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:41,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:18:41,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 142 [2021-11-20 06:18:41,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:18:56,355 INFO L129 PetriNetUnfolder]: 10753/28457 cut-off events. [2021-11-20 06:18:56,355 INFO L130 PetriNetUnfolder]: For 285432/285814 co-relation queries the response was YES. [2021-11-20 06:18:57,271 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131816 conditions, 28457 events. 10753/28457 cut-off events. For 285432/285814 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 319673 event pairs, 2596 based on Foata normal form. 74/27080 useless extension candidates. Maximal degree in co-relation 131622. Up to 14658 conditions per place. [2021-11-20 06:18:57,377 INFO L132 encePairwiseOnDemand]: 126/142 looper letters, 643 selfloop transitions, 225 changer transitions 21/988 dead transitions. [2021-11-20 06:18:57,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 988 transitions, 15386 flow [2021-11-20 06:18:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:18:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-11-20 06:18:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2044 transitions. [2021-11-20 06:18:57,380 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6542893725992317 [2021-11-20 06:18:57,380 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2044 transitions. [2021-11-20 06:18:57,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2044 transitions. [2021-11-20 06:18:57,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:18:57,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2044 transitions. [2021-11-20 06:18:57,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 92.9090909090909) internal successors, (2044), 22 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:57,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:57,384 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:18:57,384 INFO L186 Difference]: Start difference. First operand has 550 places, 825 transitions, 11927 flow. Second operand 22 states and 2044 transitions. [2021-11-20 06:18:57,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 988 transitions, 15386 flow [2021-11-20 06:19:00,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 988 transitions, 15065 flow, removed 55 selfloop flow, removed 12 redundant places. [2021-11-20 06:19:00,070 INFO L242 Difference]: Finished difference. Result has 566 places, 842 transitions, 12627 flow [2021-11-20 06:19:00,071 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=11645, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12627, PETRI_PLACES=566, PETRI_TRANSITIONS=842} [2021-11-20 06:19:00,072 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 439 predicate places. [2021-11-20 06:19:00,072 INFO L470 AbstractCegarLoop]: Abstraction has has 566 places, 842 transitions, 12627 flow [2021-11-20 06:19:00,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 88.29411764705883) internal successors, (1501), 17 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:19:00,072 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:19:00,072 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:19:00,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:19:00,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:19:00,273 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-20 06:19:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:19:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash -2121228949, now seen corresponding path program 11 times [2021-11-20 06:19:00,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:19:00,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513079224] [2021-11-20 06:19:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:19:00,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:19:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:19:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:19:00,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:19:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513079224] [2021-11-20 06:19:00,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513079224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:19:00,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964504798] [2021-11-20 06:19:00,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:19:00,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:19:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:19:00,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:19:00,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d607cbb2-3d8d-4b98-8b44-250ac8d8ab0e/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:19:01,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 06:19:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:19:01,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-20 06:19:01,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:19:02,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:19:02,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:19:02,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:19:05,411 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-11-20 06:19:05,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 43 [2021-11-20 06:19:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:19:05,555 INFO L328 TraceCheckSpWp]: Computing backward predicates...